/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-SemanticLbe.epf -i ../../../trunk/examples/svcomp/pthread/fib_bench_longest-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-7bb8cbd [2020-10-15 19:52:56,156 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-15 19:52:56,159 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-15 19:52:56,197 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-15 19:52:56,197 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-15 19:52:56,209 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-15 19:52:56,210 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-15 19:52:56,214 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-15 19:52:56,218 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-15 19:52:56,221 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-15 19:52:56,222 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-15 19:52:56,224 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-15 19:52:56,225 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-15 19:52:56,228 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-15 19:52:56,231 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-15 19:52:56,233 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-15 19:52:56,234 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-15 19:52:56,235 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-15 19:52:56,237 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-15 19:52:56,243 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-15 19:52:56,245 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-15 19:52:56,249 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-15 19:52:56,251 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-15 19:52:56,252 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-15 19:52:56,257 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-15 19:52:56,258 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-15 19:52:56,258 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-15 19:52:56,261 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-15 19:52:56,261 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-15 19:52:56,262 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-15 19:52:56,263 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-15 19:52:56,263 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-15 19:52:56,264 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-15 19:52:56,266 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-15 19:52:56,268 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-15 19:52:56,268 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-15 19:52:56,268 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-15 19:52:56,269 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-15 19:52:56,269 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-15 19:52:56,270 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-15 19:52:56,271 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-15 19:52:56,272 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-SemanticLbe.epf [2020-10-15 19:52:56,319 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-15 19:52:56,319 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-15 19:52:56,321 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-15 19:52:56,321 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-15 19:52:56,322 INFO L138 SettingsManager]: * Use SBE=true [2020-10-15 19:52:56,322 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-15 19:52:56,322 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-15 19:52:56,323 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-15 19:52:56,323 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-15 19:52:56,323 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-15 19:52:56,324 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-15 19:52:56,325 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-15 19:52:56,325 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-15 19:52:56,325 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-15 19:52:56,326 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-15 19:52:56,326 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-15 19:52:56,326 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-15 19:52:56,326 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-15 19:52:56,326 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-15 19:52:56,327 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-15 19:52:56,327 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-15 19:52:56,327 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-15 19:52:56,327 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-15 19:52:56,327 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-15 19:52:56,328 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-15 19:52:56,328 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-15 19:52:56,328 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-15 19:52:56,328 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-15 19:52:56,328 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-15 19:52:56,612 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-15 19:52:56,625 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-15 19:52:56,628 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-15 19:52:56,630 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-15 19:52:56,630 INFO L275 PluginConnector]: CDTParser initialized [2020-10-15 19:52:56,631 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench_longest-1.i [2020-10-15 19:52:56,710 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/16376d10d/a69e56093b8245239d94232248c4ede3/FLAGd2fa4fb99 [2020-10-15 19:52:57,266 INFO L306 CDTParser]: Found 1 translation units. [2020-10-15 19:52:57,266 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench_longest-1.i [2020-10-15 19:52:57,286 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/16376d10d/a69e56093b8245239d94232248c4ede3/FLAGd2fa4fb99 [2020-10-15 19:52:57,530 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/16376d10d/a69e56093b8245239d94232248c4ede3 [2020-10-15 19:52:57,539 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-15 19:52:57,541 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-15 19:52:57,542 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-15 19:52:57,542 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-15 19:52:57,546 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-15 19:52:57,547 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:52:57" (1/1) ... [2020-10-15 19:52:57,550 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31e0c050 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:52:57, skipping insertion in model container [2020-10-15 19:52:57,550 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:52:57" (1/1) ... [2020-10-15 19:52:57,558 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-15 19:52:57,609 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-15 19:52:58,022 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 19:52:58,038 INFO L203 MainTranslator]: Completed pre-run [2020-10-15 19:52:58,117 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 19:52:58,200 INFO L208 MainTranslator]: Completed translation [2020-10-15 19:52:58,202 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:52:58 WrapperNode [2020-10-15 19:52:58,203 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-15 19:52:58,204 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-15 19:52:58,204 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-15 19:52:58,204 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-15 19:52:58,213 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:52:58" (1/1) ... [2020-10-15 19:52:58,233 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:52:58" (1/1) ... [2020-10-15 19:52:58,252 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-15 19:52:58,252 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-15 19:52:58,252 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-15 19:52:58,252 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-15 19:52:58,259 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:52:58" (1/1) ... [2020-10-15 19:52:58,260 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:52:58" (1/1) ... [2020-10-15 19:52:58,262 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:52:58" (1/1) ... [2020-10-15 19:52:58,263 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:52:58" (1/1) ... [2020-10-15 19:52:58,268 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:52:58" (1/1) ... [2020-10-15 19:52:58,272 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:52:58" (1/1) ... [2020-10-15 19:52:58,274 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:52:58" (1/1) ... [2020-10-15 19:52:58,277 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-15 19:52:58,277 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-15 19:52:58,277 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-15 19:52:58,277 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-15 19:52:58,278 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:52:58" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-15 19:52:58,340 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-10-15 19:52:58,341 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-10-15 19:52:58,341 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-10-15 19:52:58,341 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-10-15 19:52:58,341 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-15 19:52:58,341 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-15 19:52:58,341 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-15 19:52:58,342 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-15 19:52:58,342 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-15 19:52:58,342 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-15 19:52:58,342 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-15 19:52:58,343 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-15 19:52:58,628 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-15 19:52:58,629 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-15 19:52:58,632 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:52:58 BoogieIcfgContainer [2020-10-15 19:52:58,632 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-15 19:52:58,634 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-15 19:52:58,634 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-15 19:52:58,638 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-15 19:52:58,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 07:52:57" (1/3) ... [2020-10-15 19:52:58,640 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@798cf277 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:52:58, skipping insertion in model container [2020-10-15 19:52:58,640 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:52:58" (2/3) ... [2020-10-15 19:52:58,640 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@798cf277 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:52:58, skipping insertion in model container [2020-10-15 19:52:58,640 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:52:58" (3/3) ... [2020-10-15 19:52:58,645 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_bench_longest-1.i [2020-10-15 19:52:58,667 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-15 19:52:58,668 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-15 19:52:58,679 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-15 19:52:58,681 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-15 19:52:58,712 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:58,713 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:58,713 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:58,713 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:58,714 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:58,729 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:58,730 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:58,730 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:58,730 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:58,731 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:58,731 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:58,731 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:58,731 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:58,732 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:58,732 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:58,732 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:58,733 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:58,733 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:58,736 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:58,738 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:58,739 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:58,739 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:58,739 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:58,743 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:58,743 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:58,743 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:58,744 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:58,744 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:58,744 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:58,744 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:58,749 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:58,749 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:58,750 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:58,750 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:58,750 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:58,750 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:58,761 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:58,761 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:58,762 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:58,762 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:58,762 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:58,762 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:58,778 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-15 19:52:58,798 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-15 19:52:58,798 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-15 19:52:58,798 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-15 19:52:58,798 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-15 19:52:58,799 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-15 19:52:58,799 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-15 19:52:58,799 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-15 19:52:58,799 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-15 19:52:58,811 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-15 19:52:58,813 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 59 places, 57 transitions, 124 flow [2020-10-15 19:52:58,816 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 59 places, 57 transitions, 124 flow [2020-10-15 19:52:58,818 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 59 places, 57 transitions, 124 flow [2020-10-15 19:52:58,859 INFO L129 PetriNetUnfolder]: 5/55 cut-off events. [2020-10-15 19:52:58,859 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-15 19:52:58,867 INFO L80 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 55 events. 5/55 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 84 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2020-10-15 19:52:58,870 INFO L117 LiptonReduction]: Number of co-enabled transitions 1032 [2020-10-15 19:52:59,992 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2020-10-15 19:53:00,119 INFO L132 LiptonReduction]: Checked pairs total: 1052 [2020-10-15 19:53:00,119 INFO L134 LiptonReduction]: Total number of compositions: 50 [2020-10-15 19:53:00,129 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 40 flow [2020-10-15 19:53:00,157 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-10-15 19:53:00,160 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-10-15 19:53:00,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-15 19:53:00,166 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:00,167 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-15 19:53:00,168 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:00,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:00,174 INFO L82 PathProgramCache]: Analyzing trace with hash -1563716626, now seen corresponding path program 1 times [2020-10-15 19:53:00,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:00,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680193276] [2020-10-15 19:53:00,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:00,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:00,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:00,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680193276] [2020-10-15 19:53:00,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 19:53:00,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-15 19:53:00,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057894747] [2020-10-15 19:53:00,419 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-15 19:53:00,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:00,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-15 19:53:00,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-15 19:53:00,438 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-10-15 19:53:00,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:00,515 INFO L93 Difference]: Finished difference Result 83 states and 212 transitions. [2020-10-15 19:53:00,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 19:53:00,518 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-10-15 19:53:00,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:00,533 INFO L225 Difference]: With dead ends: 83 [2020-10-15 19:53:00,533 INFO L226 Difference]: Without dead ends: 54 [2020-10-15 19:53:00,535 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-15 19:53:00,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-15 19:53:00,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2020-10-15 19:53:00,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-15 19:53:00,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 120 transitions. [2020-10-15 19:53:00,571 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 120 transitions. Word has length 6 [2020-10-15 19:53:00,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:00,572 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 120 transitions. [2020-10-15 19:53:00,572 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-15 19:53:00,572 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 120 transitions. [2020-10-15 19:53:00,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-15 19:53:00,573 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:00,573 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:00,574 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-15 19:53:00,574 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:00,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:00,574 INFO L82 PathProgramCache]: Analyzing trace with hash 956938306, now seen corresponding path program 1 times [2020-10-15 19:53:00,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:00,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847700541] [2020-10-15 19:53:00,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:00,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:00,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:00,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847700541] [2020-10-15 19:53:00,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 19:53:00,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-15 19:53:00,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839020311] [2020-10-15 19:53:00,702 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-15 19:53:00,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:00,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-15 19:53:00,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-15 19:53:00,704 INFO L87 Difference]: Start difference. First operand 50 states and 120 transitions. Second operand 5 states. [2020-10-15 19:53:00,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:00,756 INFO L93 Difference]: Finished difference Result 80 states and 186 transitions. [2020-10-15 19:53:00,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 19:53:00,757 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-15 19:53:00,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:00,759 INFO L225 Difference]: With dead ends: 80 [2020-10-15 19:53:00,759 INFO L226 Difference]: Without dead ends: 75 [2020-10-15 19:53:00,760 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-15 19:53:00,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-15 19:53:00,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 55. [2020-10-15 19:53:00,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-15 19:53:00,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 136 transitions. [2020-10-15 19:53:00,769 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 136 transitions. Word has length 8 [2020-10-15 19:53:00,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:00,770 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 136 transitions. [2020-10-15 19:53:00,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-15 19:53:00,771 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 136 transitions. [2020-10-15 19:53:00,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-15 19:53:00,772 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:00,772 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:00,772 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-15 19:53:00,772 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:00,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:00,773 INFO L82 PathProgramCache]: Analyzing trace with hash 507192011, now seen corresponding path program 1 times [2020-10-15 19:53:00,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:00,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631336766] [2020-10-15 19:53:00,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:00,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:00,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:00,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631336766] [2020-10-15 19:53:00,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 19:53:00,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-15 19:53:00,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154730612] [2020-10-15 19:53:00,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-15 19:53:00,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:00,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-15 19:53:00,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-15 19:53:00,858 INFO L87 Difference]: Start difference. First operand 55 states and 136 transitions. Second operand 5 states. [2020-10-15 19:53:00,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:00,882 INFO L93 Difference]: Finished difference Result 73 states and 170 transitions. [2020-10-15 19:53:00,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 19:53:00,883 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-15 19:53:00,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:00,884 INFO L225 Difference]: With dead ends: 73 [2020-10-15 19:53:00,884 INFO L226 Difference]: Without dead ends: 70 [2020-10-15 19:53:00,885 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-15 19:53:00,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-15 19:53:00,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2020-10-15 19:53:00,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-15 19:53:00,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 152 transitions. [2020-10-15 19:53:00,894 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 152 transitions. Word has length 8 [2020-10-15 19:53:00,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:00,894 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 152 transitions. [2020-10-15 19:53:00,894 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-15 19:53:00,894 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 152 transitions. [2020-10-15 19:53:00,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-15 19:53:00,896 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:00,896 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:00,896 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-15 19:53:00,896 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:00,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:00,896 INFO L82 PathProgramCache]: Analyzing trace with hash 507214331, now seen corresponding path program 2 times [2020-10-15 19:53:00,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:00,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408445162] [2020-10-15 19:53:00,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:00,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:00,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:00,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408445162] [2020-10-15 19:53:00,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 19:53:00,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-15 19:53:00,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138942137] [2020-10-15 19:53:00,958 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-15 19:53:00,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:00,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-15 19:53:00,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-15 19:53:00,959 INFO L87 Difference]: Start difference. First operand 64 states and 152 transitions. Second operand 5 states. [2020-10-15 19:53:01,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:01,028 INFO L93 Difference]: Finished difference Result 86 states and 202 transitions. [2020-10-15 19:53:01,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 19:53:01,029 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-15 19:53:01,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:01,030 INFO L225 Difference]: With dead ends: 86 [2020-10-15 19:53:01,030 INFO L226 Difference]: Without dead ends: 80 [2020-10-15 19:53:01,031 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-15 19:53:01,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-15 19:53:01,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 66. [2020-10-15 19:53:01,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-15 19:53:01,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 157 transitions. [2020-10-15 19:53:01,040 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 157 transitions. Word has length 8 [2020-10-15 19:53:01,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:01,041 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 157 transitions. [2020-10-15 19:53:01,041 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-15 19:53:01,041 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 157 transitions. [2020-10-15 19:53:01,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-15 19:53:01,042 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:01,043 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:01,043 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-15 19:53:01,043 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:01,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:01,044 INFO L82 PathProgramCache]: Analyzing trace with hash -399661872, now seen corresponding path program 2 times [2020-10-15 19:53:01,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:01,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672600062] [2020-10-15 19:53:01,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:01,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:01,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:01,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672600062] [2020-10-15 19:53:01,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037687104] [2020-10-15 19:53:01,177 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 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:01,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:53:01,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:01,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-15 19:53:01,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:01,306 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:53:01,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:01,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:01,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2020-10-15 19:53:01,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091906948] [2020-10-15 19:53:01,330 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 19:53:01,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:01,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 19:53:01,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-15 19:53:01,330 INFO L87 Difference]: Start difference. First operand 66 states and 157 transitions. Second operand 10 states. [2020-10-15 19:53:01,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:01,403 INFO L93 Difference]: Finished difference Result 101 states and 235 transitions. [2020-10-15 19:53:01,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 19:53:01,403 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2020-10-15 19:53:01,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:01,405 INFO L225 Difference]: With dead ends: 101 [2020-10-15 19:53:01,405 INFO L226 Difference]: Without dead ends: 96 [2020-10-15 19:53:01,405 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:01,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-15 19:53:01,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2020-10-15 19:53:01,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-15 19:53:01,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 173 transitions. [2020-10-15 19:53:01,413 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 173 transitions. Word has length 9 [2020-10-15 19:53:01,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:01,413 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 173 transitions. [2020-10-15 19:53:01,413 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 19:53:01,414 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 173 transitions. [2020-10-15 19:53:01,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-15 19:53:01,414 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:01,415 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:01,626 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:01,627 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:01,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:01,628 INFO L82 PathProgramCache]: Analyzing trace with hash -1456916488, now seen corresponding path program 3 times [2020-10-15 19:53:01,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:01,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628820268] [2020-10-15 19:53:01,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:01,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:01,725 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:01,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628820268] [2020-10-15 19:53:01,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165376962] [2020-10-15 19:53:01,726 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 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:01,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 19:53:01,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:01,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-15 19:53:01,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:01,836 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:01,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:01,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-15 19:53:01,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570376878] [2020-10-15 19:53:01,837 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 19:53:01,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:01,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 19:53:01,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-15 19:53:01,838 INFO L87 Difference]: Start difference. First operand 71 states and 173 transitions. Second operand 9 states. [2020-10-15 19:53:01,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:01,868 INFO L93 Difference]: Finished difference Result 84 states and 199 transitions. [2020-10-15 19:53:01,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-15 19:53:01,869 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-10-15 19:53:01,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:01,870 INFO L225 Difference]: With dead ends: 84 [2020-10-15 19:53:01,870 INFO L226 Difference]: Without dead ends: 81 [2020-10-15 19:53:01,871 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-15 19:53:01,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-15 19:53:01,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 74. [2020-10-15 19:53:01,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-15 19:53:01,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 179 transitions. [2020-10-15 19:53:01,878 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 179 transitions. Word has length 9 [2020-10-15 19:53:01,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:01,878 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 179 transitions. [2020-10-15 19:53:01,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 19:53:01,879 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 179 transitions. [2020-10-15 19:53:01,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-15 19:53:01,879 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:01,880 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:02,093 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:02,094 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:02,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:02,094 INFO L82 PathProgramCache]: Analyzing trace with hash -1456224568, now seen corresponding path program 4 times [2020-10-15 19:53:02,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:02,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396510915] [2020-10-15 19:53:02,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:02,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:02,151 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:02,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396510915] [2020-10-15 19:53:02,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286324988] [2020-10-15 19:53:02,152 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:02,197 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:53:02,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:02,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-15 19:53:02,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:02,272 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:02,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:02,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-15 19:53:02,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049661532] [2020-10-15 19:53:02,273 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 19:53:02,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:02,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 19:53:02,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-10-15 19:53:02,274 INFO L87 Difference]: Start difference. First operand 74 states and 179 transitions. Second operand 9 states. [2020-10-15 19:53:02,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:02,321 INFO L93 Difference]: Finished difference Result 90 states and 213 transitions. [2020-10-15 19:53:02,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 19:53:02,322 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-10-15 19:53:02,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:02,323 INFO L225 Difference]: With dead ends: 90 [2020-10-15 19:53:02,323 INFO L226 Difference]: Without dead ends: 87 [2020-10-15 19:53:02,323 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-15 19:53:02,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-15 19:53:02,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 76. [2020-10-15 19:53:02,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-15 19:53:02,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 186 transitions. [2020-10-15 19:53:02,330 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 186 transitions. Word has length 9 [2020-10-15 19:53:02,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:02,331 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 186 transitions. [2020-10-15 19:53:02,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 19:53:02,331 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 186 transitions. [2020-10-15 19:53:02,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-15 19:53:02,332 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:02,332 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:02,546 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:02,547 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:02,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:02,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1456202248, now seen corresponding path program 5 times [2020-10-15 19:53:02,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:02,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350803549] [2020-10-15 19:53:02,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:02,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:02,604 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:02,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350803549] [2020-10-15 19:53:02,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336612858] [2020-10-15 19:53:02,605 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:02,647 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:53:02,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:02,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-15 19:53:02,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:02,710 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:53:02,721 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:02,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:02,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-15 19:53:02,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547337569] [2020-10-15 19:53:02,723 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 19:53:02,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:02,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 19:53:02,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-15 19:53:02,724 INFO L87 Difference]: Start difference. First operand 76 states and 186 transitions. Second operand 9 states. [2020-10-15 19:53:02,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:02,823 INFO L93 Difference]: Finished difference Result 99 states and 237 transitions. [2020-10-15 19:53:02,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 19:53:02,824 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-10-15 19:53:02,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:02,825 INFO L225 Difference]: With dead ends: 99 [2020-10-15 19:53:02,825 INFO L226 Difference]: Without dead ends: 93 [2020-10-15 19:53:02,826 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2020-10-15 19:53:02,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-15 19:53:02,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 77. [2020-10-15 19:53:02,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-15 19:53:02,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 190 transitions. [2020-10-15 19:53:02,832 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 190 transitions. Word has length 9 [2020-10-15 19:53:02,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:02,832 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 190 transitions. [2020-10-15 19:53:02,832 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 19:53:02,832 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 190 transitions. [2020-10-15 19:53:02,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 19:53:02,833 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:02,834 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:03,034 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:03,035 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:03,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:03,036 INFO L82 PathProgramCache]: Analyzing trace with hash 483638869, now seen corresponding path program 1 times [2020-10-15 19:53:03,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:03,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614664019] [2020-10-15 19:53:03,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:03,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:03,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:03,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614664019] [2020-10-15 19:53:03,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 19:53:03,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 19:53:03,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40346945] [2020-10-15 19:53:03,103 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 19:53:03,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:03,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 19:53:03,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-15 19:53:03,104 INFO L87 Difference]: Start difference. First operand 77 states and 190 transitions. Second operand 6 states. [2020-10-15 19:53:03,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:03,152 INFO L93 Difference]: Finished difference Result 92 states and 220 transitions. [2020-10-15 19:53:03,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-15 19:53:03,153 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-15 19:53:03,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:03,154 INFO L225 Difference]: With dead ends: 92 [2020-10-15 19:53:03,154 INFO L226 Difference]: Without dead ends: 90 [2020-10-15 19:53:03,154 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-15 19:53:03,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-15 19:53:03,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 79. [2020-10-15 19:53:03,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-15 19:53:03,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 194 transitions. [2020-10-15 19:53:03,164 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 194 transitions. Word has length 10 [2020-10-15 19:53:03,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:03,165 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 194 transitions. [2020-10-15 19:53:03,165 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 19:53:03,166 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 194 transitions. [2020-10-15 19:53:03,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 19:53:03,168 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:03,168 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:03,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-15 19:53:03,169 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:03,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:03,170 INFO L82 PathProgramCache]: Analyzing trace with hash 484301959, now seen corresponding path program 2 times [2020-10-15 19:53:03,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:03,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409641194] [2020-10-15 19:53:03,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:03,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:03,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:03,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409641194] [2020-10-15 19:53:03,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 19:53:03,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 19:53:03,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137516862] [2020-10-15 19:53:03,268 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 19:53:03,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:03,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 19:53:03,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-15 19:53:03,269 INFO L87 Difference]: Start difference. First operand 79 states and 194 transitions. Second operand 6 states. [2020-10-15 19:53:03,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:03,318 INFO L93 Difference]: Finished difference Result 100 states and 234 transitions. [2020-10-15 19:53:03,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 19:53:03,318 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-15 19:53:03,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:03,319 INFO L225 Difference]: With dead ends: 100 [2020-10-15 19:53:03,319 INFO L226 Difference]: Without dead ends: 98 [2020-10-15 19:53:03,320 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-15 19:53:03,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-15 19:53:03,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 83. [2020-10-15 19:53:03,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-15 19:53:03,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 200 transitions. [2020-10-15 19:53:03,333 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 200 transitions. Word has length 10 [2020-10-15 19:53:03,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:03,333 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 200 transitions. [2020-10-15 19:53:03,333 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 19:53:03,334 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 200 transitions. [2020-10-15 19:53:03,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 19:53:03,338 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:03,338 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:03,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-15 19:53:03,338 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:03,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:03,339 INFO L82 PathProgramCache]: Analyzing trace with hash 484324279, now seen corresponding path program 3 times [2020-10-15 19:53:03,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:03,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817831628] [2020-10-15 19:53:03,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:03,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:03,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:03,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817831628] [2020-10-15 19:53:03,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 19:53:03,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 19:53:03,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415049188] [2020-10-15 19:53:03,421 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 19:53:03,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:03,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 19:53:03,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-15 19:53:03,422 INFO L87 Difference]: Start difference. First operand 83 states and 200 transitions. Second operand 6 states. [2020-10-15 19:53:03,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:03,491 INFO L93 Difference]: Finished difference Result 105 states and 246 transitions. [2020-10-15 19:53:03,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 19:53:03,492 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-15 19:53:03,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:03,493 INFO L225 Difference]: With dead ends: 105 [2020-10-15 19:53:03,493 INFO L226 Difference]: Without dead ends: 100 [2020-10-15 19:53:03,494 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-15 19:53:03,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-15 19:53:03,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2020-10-15 19:53:03,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-15 19:53:03,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 198 transitions. [2020-10-15 19:53:03,505 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 198 transitions. Word has length 10 [2020-10-15 19:53:03,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:03,505 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 198 transitions. [2020-10-15 19:53:03,505 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 19:53:03,505 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 198 transitions. [2020-10-15 19:53:03,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 19:53:03,506 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:03,506 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:03,506 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-15 19:53:03,506 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:03,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:03,507 INFO L82 PathProgramCache]: Analyzing trace with hash 484353109, now seen corresponding path program 4 times [2020-10-15 19:53:03,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:03,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277636104] [2020-10-15 19:53:03,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:03,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:03,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:03,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277636104] [2020-10-15 19:53:03,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 19:53:03,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 19:53:03,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159778742] [2020-10-15 19:53:03,554 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 19:53:03,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:03,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 19:53:03,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-15 19:53:03,555 INFO L87 Difference]: Start difference. First operand 82 states and 198 transitions. Second operand 6 states. [2020-10-15 19:53:03,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:03,617 INFO L93 Difference]: Finished difference Result 105 states and 246 transitions. [2020-10-15 19:53:03,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 19:53:03,618 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-15 19:53:03,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:03,619 INFO L225 Difference]: With dead ends: 105 [2020-10-15 19:53:03,619 INFO L226 Difference]: Without dead ends: 100 [2020-10-15 19:53:03,619 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-15 19:53:03,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-15 19:53:03,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2020-10-15 19:53:03,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-15 19:53:03,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 194 transitions. [2020-10-15 19:53:03,624 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 194 transitions. Word has length 10 [2020-10-15 19:53:03,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:03,624 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 194 transitions. [2020-10-15 19:53:03,624 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 19:53:03,624 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 194 transitions. [2020-10-15 19:53:03,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 19:53:03,625 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:03,625 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:03,625 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-15 19:53:03,625 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:03,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:03,626 INFO L82 PathProgramCache]: Analyzing trace with hash 495405570, now seen corresponding path program 3 times [2020-10-15 19:53:03,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:03,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305173774] [2020-10-15 19:53:03,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:03,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:03,693 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:03,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305173774] [2020-10-15 19:53:03,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660753213] [2020-10-15 19:53:03,693 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:03,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 19:53:03,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:03,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 19:53:03,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:03,801 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:53:03,822 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:03,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:03,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-10-15 19:53:03,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150232841] [2020-10-15 19:53:03,823 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 19:53:03,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:03,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 19:53:03,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-10-15 19:53:03,824 INFO L87 Difference]: Start difference. First operand 82 states and 194 transitions. Second operand 12 states. [2020-10-15 19:53:03,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:03,921 INFO L93 Difference]: Finished difference Result 122 states and 284 transitions. [2020-10-15 19:53:03,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 19:53:03,921 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 10 [2020-10-15 19:53:03,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:03,923 INFO L225 Difference]: With dead ends: 122 [2020-10-15 19:53:03,923 INFO L226 Difference]: Without dead ends: 117 [2020-10-15 19:53:03,924 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-10-15 19:53:03,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-15 19:53:03,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 88. [2020-10-15 19:53:03,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-15 19:53:03,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 215 transitions. [2020-10-15 19:53:03,929 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 215 transitions. Word has length 10 [2020-10-15 19:53:03,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:03,929 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 215 transitions. [2020-10-15 19:53:03,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 19:53:03,930 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 215 transitions. [2020-10-15 19:53:03,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 19:53:03,930 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:03,930 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:04,142 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-15 19:53:04,143 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:04,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:04,143 INFO L82 PathProgramCache]: Analyzing trace with hash 2080229483, now seen corresponding path program 6 times [2020-10-15 19:53:04,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:04,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979694061] [2020-10-15 19:53:04,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:04,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:04,220 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:04,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979694061] [2020-10-15 19:53:04,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197410837] [2020-10-15 19:53:04,221 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:04,259 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 19:53:04,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:04,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 19:53:04,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:04,336 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:04,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:04,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 19:53:04,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838976024] [2020-10-15 19:53:04,337 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 19:53:04,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:04,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 19:53:04,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-15 19:53:04,338 INFO L87 Difference]: Start difference. First operand 88 states and 215 transitions. Second operand 11 states. [2020-10-15 19:53:04,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:04,380 INFO L93 Difference]: Finished difference Result 108 states and 255 transitions. [2020-10-15 19:53:04,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 19:53:04,381 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-10-15 19:53:04,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:04,383 INFO L225 Difference]: With dead ends: 108 [2020-10-15 19:53:04,383 INFO L226 Difference]: Without dead ends: 105 [2020-10-15 19:53:04,384 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-15 19:53:04,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-15 19:53:04,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 91. [2020-10-15 19:53:04,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-15 19:53:04,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 221 transitions. [2020-10-15 19:53:04,390 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 221 transitions. Word has length 10 [2020-10-15 19:53:04,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:04,390 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 221 transitions. [2020-10-15 19:53:04,390 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 19:53:04,390 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 221 transitions. [2020-10-15 19:53:04,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 19:53:04,391 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:04,391 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:04,603 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:04,604 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:04,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:04,605 INFO L82 PathProgramCache]: Analyzing trace with hash 2101679003, now seen corresponding path program 7 times [2020-10-15 19:53:04,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:04,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611607504] [2020-10-15 19:53:04,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:04,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:04,679 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:04,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611607504] [2020-10-15 19:53:04,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826266890] [2020-10-15 19:53:04,680 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:04,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:04,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 19:53:04,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:04,832 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:04,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:04,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 19:53:04,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906544655] [2020-10-15 19:53:04,834 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 19:53:04,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:04,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 19:53:04,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-15 19:53:04,835 INFO L87 Difference]: Start difference. First operand 91 states and 221 transitions. Second operand 11 states. [2020-10-15 19:53:04,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:04,889 INFO L93 Difference]: Finished difference Result 116 states and 270 transitions. [2020-10-15 19:53:04,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 19:53:04,889 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-10-15 19:53:04,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:04,891 INFO L225 Difference]: With dead ends: 116 [2020-10-15 19:53:04,894 INFO L226 Difference]: Without dead ends: 113 [2020-10-15 19:53:04,895 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-10-15 19:53:04,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-15 19:53:04,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 92. [2020-10-15 19:53:04,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-15 19:53:04,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 223 transitions. [2020-10-15 19:53:04,903 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 223 transitions. Word has length 10 [2020-10-15 19:53:04,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:04,903 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 223 transitions. [2020-10-15 19:53:04,903 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 19:53:04,903 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 223 transitions. [2020-10-15 19:53:04,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 19:53:04,917 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:04,917 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:05,128 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-15 19:53:05,129 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:05,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:05,130 INFO L82 PathProgramCache]: Analyzing trace with hash 2102370923, now seen corresponding path program 8 times [2020-10-15 19:53:05,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:05,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149395190] [2020-10-15 19:53:05,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:05,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:05,200 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:05,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149395190] [2020-10-15 19:53:05,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389034398] [2020-10-15 19:53:05,201 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:05,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:53:05,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:05,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 19:53:05,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:05,384 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:05,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:05,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 19:53:05,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741066265] [2020-10-15 19:53:05,386 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 19:53:05,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:05,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 19:53:05,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-15 19:53:05,387 INFO L87 Difference]: Start difference. First operand 92 states and 223 transitions. Second operand 11 states. [2020-10-15 19:53:05,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:05,481 INFO L93 Difference]: Finished difference Result 115 states and 270 transitions. [2020-10-15 19:53:05,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 19:53:05,482 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-10-15 19:53:05,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:05,483 INFO L225 Difference]: With dead ends: 115 [2020-10-15 19:53:05,483 INFO L226 Difference]: Without dead ends: 112 [2020-10-15 19:53:05,484 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:05,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-15 19:53:05,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 94. [2020-10-15 19:53:05,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-15 19:53:05,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 230 transitions. [2020-10-15 19:53:05,489 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 230 transitions. Word has length 10 [2020-10-15 19:53:05,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:05,490 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 230 transitions. [2020-10-15 19:53:05,490 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 19:53:05,490 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 230 transitions. [2020-10-15 19:53:05,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 19:53:05,491 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:05,491 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:05,702 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-15 19:53:05,702 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:05,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:05,703 INFO L82 PathProgramCache]: Analyzing trace with hash 2102393243, now seen corresponding path program 9 times [2020-10-15 19:53:05,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:05,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451471185] [2020-10-15 19:53:05,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:05,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:05,752 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:05,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451471185] [2020-10-15 19:53:05,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111170376] [2020-10-15 19:53:05,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:05,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 19:53:05,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:05,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 19:53:05,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:05,861 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:53:05,877 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:05,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:05,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 19:53:05,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930055777] [2020-10-15 19:53:05,879 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 19:53:05,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:05,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 19:53:05,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-15 19:53:05,880 INFO L87 Difference]: Start difference. First operand 94 states and 230 transitions. Second operand 11 states. [2020-10-15 19:53:05,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:05,988 INFO L93 Difference]: Finished difference Result 124 states and 294 transitions. [2020-10-15 19:53:05,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 19:53:05,989 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-10-15 19:53:05,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:05,990 INFO L225 Difference]: With dead ends: 124 [2020-10-15 19:53:05,990 INFO L226 Difference]: Without dead ends: 118 [2020-10-15 19:53:05,990 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:05,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-15 19:53:05,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 94. [2020-10-15 19:53:05,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-15 19:53:05,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 232 transitions. [2020-10-15 19:53:05,994 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 232 transitions. Word has length 10 [2020-10-15 19:53:05,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:05,995 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 232 transitions. [2020-10-15 19:53:05,995 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 19:53:05,995 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 232 transitions. [2020-10-15 19:53:05,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 19:53:05,995 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:05,996 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:06,196 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-15 19:53:06,196 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:06,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:06,197 INFO L82 PathProgramCache]: Analyzing trace with hash 2107902445, now seen corresponding path program 5 times [2020-10-15 19:53:06,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:06,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125785594] [2020-10-15 19:53:06,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:06,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:06,281 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:06,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125785594] [2020-10-15 19:53:06,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367301912] [2020-10-15 19:53:06,282 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:06,321 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:53:06,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:06,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 19:53:06,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:06,409 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:06,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:06,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 19:53:06,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147198902] [2020-10-15 19:53:06,410 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 19:53:06,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:06,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 19:53:06,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-15 19:53:06,411 INFO L87 Difference]: Start difference. First operand 94 states and 232 transitions. Second operand 11 states. [2020-10-15 19:53:06,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:06,458 INFO L93 Difference]: Finished difference Result 113 states and 270 transitions. [2020-10-15 19:53:06,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 19:53:06,459 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 19:53:06,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:06,460 INFO L225 Difference]: With dead ends: 113 [2020-10-15 19:53:06,460 INFO L226 Difference]: Without dead ends: 111 [2020-10-15 19:53:06,460 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-15 19:53:06,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-15 19:53:06,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 96. [2020-10-15 19:53:06,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-15 19:53:06,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 238 transitions. [2020-10-15 19:53:06,464 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 238 transitions. Word has length 11 [2020-10-15 19:53:06,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:06,464 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 238 transitions. [2020-10-15 19:53:06,464 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 19:53:06,465 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 238 transitions. [2020-10-15 19:53:06,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 19:53:06,465 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:06,465 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:06,666 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-15 19:53:06,666 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:06,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:06,667 INFO L82 PathProgramCache]: Analyzing trace with hash 2107903406, now seen corresponding path program 6 times [2020-10-15 19:53:06,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:06,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59008841] [2020-10-15 19:53:06,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:06,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:06,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:06,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59008841] [2020-10-15 19:53:06,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944997894] [2020-10-15 19:53:06,725 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:06,775 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 19:53:06,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:06,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 19:53:06,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:06,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:06,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:06,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 19:53:06,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802726118] [2020-10-15 19:53:06,868 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 19:53:06,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:06,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 19:53:06,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-15 19:53:06,871 INFO L87 Difference]: Start difference. First operand 96 states and 238 transitions. Second operand 11 states. [2020-10-15 19:53:06,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:06,933 INFO L93 Difference]: Finished difference Result 118 states and 280 transitions. [2020-10-15 19:53:06,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 19:53:06,933 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 19:53:06,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:06,934 INFO L225 Difference]: With dead ends: 118 [2020-10-15 19:53:06,935 INFO L226 Difference]: Without dead ends: 116 [2020-10-15 19:53:06,935 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:06,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-15 19:53:06,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 97. [2020-10-15 19:53:06,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-15 19:53:06,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 239 transitions. [2020-10-15 19:53:06,939 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 239 transitions. Word has length 11 [2020-10-15 19:53:06,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:06,939 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 239 transitions. [2020-10-15 19:53:06,939 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 19:53:06,939 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 239 transitions. [2020-10-15 19:53:06,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 19:53:06,940 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:06,940 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:07,141 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:07,141 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:07,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:07,142 INFO L82 PathProgramCache]: Analyzing trace with hash 2107932236, now seen corresponding path program 7 times [2020-10-15 19:53:07,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:07,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001869500] [2020-10-15 19:53:07,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:07,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:07,215 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:07,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001869500] [2020-10-15 19:53:07,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505385028] [2020-10-15 19:53:07,216 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:07,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:07,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 19:53:07,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:07,336 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:07,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:07,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 19:53:07,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173938173] [2020-10-15 19:53:07,337 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 19:53:07,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:07,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 19:53:07,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-15 19:53:07,338 INFO L87 Difference]: Start difference. First operand 97 states and 239 transitions. Second operand 11 states. [2020-10-15 19:53:07,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:07,406 INFO L93 Difference]: Finished difference Result 119 states and 282 transitions. [2020-10-15 19:53:07,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 19:53:07,407 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 19:53:07,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:07,408 INFO L225 Difference]: With dead ends: 119 [2020-10-15 19:53:07,408 INFO L226 Difference]: Without dead ends: 117 [2020-10-15 19:53:07,409 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:07,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-15 19:53:07,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 98. [2020-10-15 19:53:07,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-15 19:53:07,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 241 transitions. [2020-10-15 19:53:07,412 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 241 transitions. Word has length 11 [2020-10-15 19:53:07,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:07,413 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 241 transitions. [2020-10-15 19:53:07,413 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 19:53:07,413 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 241 transitions. [2020-10-15 19:53:07,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 19:53:07,413 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:07,414 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:07,621 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:07,622 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:07,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:07,622 INFO L82 PathProgramCache]: Analyzing trace with hash 2128458235, now seen corresponding path program 8 times [2020-10-15 19:53:07,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:07,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642678411] [2020-10-15 19:53:07,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:07,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:07,705 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:07,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642678411] [2020-10-15 19:53:07,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681128678] [2020-10-15 19:53:07,706 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:07,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:53:07,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:07,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 19:53:07,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:07,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:07,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:07,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 19:53:07,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022663729] [2020-10-15 19:53:07,825 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 19:53:07,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:07,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 19:53:07,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-15 19:53:07,826 INFO L87 Difference]: Start difference. First operand 98 states and 241 transitions. Second operand 11 states. [2020-10-15 19:53:07,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:07,873 INFO L93 Difference]: Finished difference Result 122 states and 288 transitions. [2020-10-15 19:53:07,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 19:53:07,874 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 19:53:07,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:07,875 INFO L225 Difference]: With dead ends: 122 [2020-10-15 19:53:07,875 INFO L226 Difference]: Without dead ends: 120 [2020-10-15 19:53:07,875 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-10-15 19:53:07,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-15 19:53:07,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 100. [2020-10-15 19:53:07,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-15 19:53:07,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 247 transitions. [2020-10-15 19:53:07,879 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 247 transitions. Word has length 11 [2020-10-15 19:53:07,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:07,879 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 247 transitions. [2020-10-15 19:53:07,880 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 19:53:07,880 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 247 transitions. [2020-10-15 19:53:07,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 19:53:07,880 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:07,880 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:08,091 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-10-15 19:53:08,092 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:08,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:08,092 INFO L82 PathProgramCache]: Analyzing trace with hash 2128459196, now seen corresponding path program 9 times [2020-10-15 19:53:08,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:08,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396552855] [2020-10-15 19:53:08,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:08,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:08,151 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:08,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396552855] [2020-10-15 19:53:08,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178864289] [2020-10-15 19:53:08,152 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:08,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 19:53:08,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:08,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 19:53:08,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:08,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:08,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:08,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 19:53:08,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878791999] [2020-10-15 19:53:08,255 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 19:53:08,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:08,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 19:53:08,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-15 19:53:08,256 INFO L87 Difference]: Start difference. First operand 100 states and 247 transitions. Second operand 11 states. [2020-10-15 19:53:08,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:08,341 INFO L93 Difference]: Finished difference Result 123 states and 290 transitions. [2020-10-15 19:53:08,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 19:53:08,341 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 19:53:08,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:08,342 INFO L225 Difference]: With dead ends: 123 [2020-10-15 19:53:08,342 INFO L226 Difference]: Without dead ends: 121 [2020-10-15 19:53:08,343 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-10-15 19:53:08,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-15 19:53:08,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 99. [2020-10-15 19:53:08,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-15 19:53:08,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 243 transitions. [2020-10-15 19:53:08,346 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 243 transitions. Word has length 11 [2020-10-15 19:53:08,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:08,347 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 243 transitions. [2020-10-15 19:53:08,347 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 19:53:08,347 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 243 transitions. [2020-10-15 19:53:08,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 19:53:08,347 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:08,347 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:08,556 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:08,556 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:08,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:08,557 INFO L82 PathProgramCache]: Analyzing trace with hash 2129121325, now seen corresponding path program 10 times [2020-10-15 19:53:08,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:08,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615377542] [2020-10-15 19:53:08,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:08,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:08,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:08,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615377542] [2020-10-15 19:53:08,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310636145] [2020-10-15 19:53:08,617 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:08,663 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:53:08,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:08,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 19:53:08,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:08,730 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:08,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:08,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 19:53:08,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394943726] [2020-10-15 19:53:08,731 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 19:53:08,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:08,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 19:53:08,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-15 19:53:08,732 INFO L87 Difference]: Start difference. First operand 99 states and 243 transitions. Second operand 11 states. [2020-10-15 19:53:08,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:08,812 INFO L93 Difference]: Finished difference Result 123 states and 287 transitions. [2020-10-15 19:53:08,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 19:53:08,813 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 19:53:08,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:08,814 INFO L225 Difference]: With dead ends: 123 [2020-10-15 19:53:08,814 INFO L226 Difference]: Without dead ends: 121 [2020-10-15 19:53:08,814 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:08,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-15 19:53:08,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 103. [2020-10-15 19:53:08,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-15 19:53:08,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 249 transitions. [2020-10-15 19:53:08,818 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 249 transitions. Word has length 11 [2020-10-15 19:53:08,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:08,819 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 249 transitions. [2020-10-15 19:53:08,819 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 19:53:08,819 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 249 transitions. [2020-10-15 19:53:08,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 19:53:08,822 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:08,822 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:09,022 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-10-15 19:53:09,022 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:09,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:09,023 INFO L82 PathProgramCache]: Analyzing trace with hash 2129143645, now seen corresponding path program 11 times [2020-10-15 19:53:09,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:09,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125978889] [2020-10-15 19:53:09,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:09,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:09,075 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:09,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125978889] [2020-10-15 19:53:09,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536650293] [2020-10-15 19:53:09,075 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:09,129 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:53:09,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:09,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 19:53:09,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:09,191 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:53:09,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:09,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:09,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 19:53:09,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811229502] [2020-10-15 19:53:09,233 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 19:53:09,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:09,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 19:53:09,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-15 19:53:09,234 INFO L87 Difference]: Start difference. First operand 103 states and 249 transitions. Second operand 11 states. [2020-10-15 19:53:09,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:09,408 INFO L93 Difference]: Finished difference Result 133 states and 314 transitions. [2020-10-15 19:53:09,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 19:53:09,409 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 19:53:09,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:09,410 INFO L225 Difference]: With dead ends: 133 [2020-10-15 19:53:09,410 INFO L226 Difference]: Without dead ends: 128 [2020-10-15 19:53:09,410 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:53:09,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-15 19:53:09,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 102. [2020-10-15 19:53:09,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-15 19:53:09,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 247 transitions. [2020-10-15 19:53:09,415 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 247 transitions. Word has length 11 [2020-10-15 19:53:09,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:09,415 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 247 transitions. [2020-10-15 19:53:09,415 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 19:53:09,416 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 247 transitions. [2020-10-15 19:53:09,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 19:53:09,416 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:09,417 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:09,627 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:09,627 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:09,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:09,628 INFO L82 PathProgramCache]: Analyzing trace with hash 2129151116, now seen corresponding path program 12 times [2020-10-15 19:53:09,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:09,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383709673] [2020-10-15 19:53:09,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:09,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:09,694 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:09,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383709673] [2020-10-15 19:53:09,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725832313] [2020-10-15 19:53:09,694 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:09,748 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 19:53:09,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:09,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 19:53:09,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:09,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:09,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:09,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 19:53:09,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646668628] [2020-10-15 19:53:09,836 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 19:53:09,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:09,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 19:53:09,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-15 19:53:09,839 INFO L87 Difference]: Start difference. First operand 102 states and 247 transitions. Second operand 11 states. [2020-10-15 19:53:09,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:09,940 INFO L93 Difference]: Finished difference Result 127 states and 298 transitions. [2020-10-15 19:53:09,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 19:53:09,941 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 19:53:09,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:09,942 INFO L225 Difference]: With dead ends: 127 [2020-10-15 19:53:09,942 INFO L226 Difference]: Without dead ends: 125 [2020-10-15 19:53:09,942 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:09,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-15 19:53:09,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 104. [2020-10-15 19:53:09,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-15 19:53:09,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 254 transitions. [2020-10-15 19:53:09,947 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 254 transitions. Word has length 11 [2020-10-15 19:53:09,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:09,947 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 254 transitions. [2020-10-15 19:53:09,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 19:53:09,947 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 254 transitions. [2020-10-15 19:53:09,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 19:53:09,948 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:09,948 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:10,158 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-10-15 19:53:10,158 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:10,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:10,159 INFO L82 PathProgramCache]: Analyzing trace with hash 2129172475, now seen corresponding path program 13 times [2020-10-15 19:53:10,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:10,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036206533] [2020-10-15 19:53:10,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:10,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:10,218 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:10,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036206533] [2020-10-15 19:53:10,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032432034] [2020-10-15 19:53:10,219 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:10,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:10,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 19:53:10,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:10,306 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:53:10,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:10,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:10,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 19:53:10,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451892354] [2020-10-15 19:53:10,315 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 19:53:10,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:10,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 19:53:10,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-15 19:53:10,315 INFO L87 Difference]: Start difference. First operand 104 states and 254 transitions. Second operand 11 states. [2020-10-15 19:53:10,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:10,504 INFO L93 Difference]: Finished difference Result 141 states and 334 transitions. [2020-10-15 19:53:10,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 19:53:10,504 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 19:53:10,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:10,506 INFO L225 Difference]: With dead ends: 141 [2020-10-15 19:53:10,506 INFO L226 Difference]: Without dead ends: 136 [2020-10-15 19:53:10,506 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2020-10-15 19:53:10,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-15 19:53:10,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 104. [2020-10-15 19:53:10,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-15 19:53:10,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 254 transitions. [2020-10-15 19:53:10,511 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 254 transitions. Word has length 11 [2020-10-15 19:53:10,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:10,511 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 254 transitions. [2020-10-15 19:53:10,511 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 19:53:10,511 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 254 transitions. [2020-10-15 19:53:10,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 19:53:10,512 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:10,512 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:10,722 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-10-15 19:53:10,722 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:10,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:10,723 INFO L82 PathProgramCache]: Analyzing trace with hash 2129173436, now seen corresponding path program 14 times [2020-10-15 19:53:10,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:10,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392199046] [2020-10-15 19:53:10,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:10,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:10,770 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:10,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392199046] [2020-10-15 19:53:10,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257993446] [2020-10-15 19:53:10,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:10,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:53:10,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:10,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 19:53:10,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:10,877 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:53:10,886 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:10,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:10,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 19:53:10,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107847439] [2020-10-15 19:53:10,887 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 19:53:10,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:10,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 19:53:10,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-15 19:53:10,888 INFO L87 Difference]: Start difference. First operand 104 states and 254 transitions. Second operand 11 states. [2020-10-15 19:53:11,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:11,047 INFO L93 Difference]: Finished difference Result 136 states and 319 transitions. [2020-10-15 19:53:11,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 19:53:11,048 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 19:53:11,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:11,049 INFO L225 Difference]: With dead ends: 136 [2020-10-15 19:53:11,050 INFO L226 Difference]: Without dead ends: 131 [2020-10-15 19:53:11,050 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:53:11,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-15 19:53:11,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 101. [2020-10-15 19:53:11,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-15 19:53:11,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 245 transitions. [2020-10-15 19:53:11,055 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 245 transitions. Word has length 11 [2020-10-15 19:53:11,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:11,055 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 245 transitions. [2020-10-15 19:53:11,055 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 19:53:11,055 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 245 transitions. [2020-10-15 19:53:11,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 19:53:11,056 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:11,056 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:11,266 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-10-15 19:53:11,267 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:11,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:11,267 INFO L82 PathProgramCache]: Analyzing trace with hash 2129381756, now seen corresponding path program 15 times [2020-10-15 19:53:11,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:11,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494655307] [2020-10-15 19:53:11,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:11,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:11,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:11,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494655307] [2020-10-15 19:53:11,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825820101] [2020-10-15 19:53:11,327 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:11,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 19:53:11,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:11,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 19:53:11,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:11,449 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:11,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:11,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 19:53:11,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675352838] [2020-10-15 19:53:11,449 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 19:53:11,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:11,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 19:53:11,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-15 19:53:11,452 INFO L87 Difference]: Start difference. First operand 101 states and 245 transitions. Second operand 11 states. [2020-10-15 19:53:11,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:11,555 INFO L93 Difference]: Finished difference Result 130 states and 301 transitions. [2020-10-15 19:53:11,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 19:53:11,555 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 19:53:11,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:11,556 INFO L225 Difference]: With dead ends: 130 [2020-10-15 19:53:11,556 INFO L226 Difference]: Without dead ends: 128 [2020-10-15 19:53:11,557 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-10-15 19:53:11,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-15 19:53:11,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 99. [2020-10-15 19:53:11,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-15 19:53:11,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 240 transitions. [2020-10-15 19:53:11,560 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 240 transitions. Word has length 11 [2020-10-15 19:53:11,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:11,561 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 240 transitions. [2020-10-15 19:53:11,561 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 19:53:11,561 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 240 transitions. [2020-10-15 19:53:11,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 19:53:11,562 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:11,563 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:11,763 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-10-15 19:53:11,764 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:11,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:11,764 INFO L82 PathProgramCache]: Analyzing trace with hash 2130044846, now seen corresponding path program 16 times [2020-10-15 19:53:11,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:11,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372203183] [2020-10-15 19:53:11,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:11,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:11,808 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:11,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372203183] [2020-10-15 19:53:11,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865682004] [2020-10-15 19:53:11,809 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:11,846 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:53:11,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:11,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 19:53:11,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:11,944 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:11,944 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:11,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 19:53:11,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545221622] [2020-10-15 19:53:11,945 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 19:53:11,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:11,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 19:53:11,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-15 19:53:11,945 INFO L87 Difference]: Start difference. First operand 99 states and 240 transitions. Second operand 11 states. [2020-10-15 19:53:12,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:12,071 INFO L93 Difference]: Finished difference Result 131 states and 303 transitions. [2020-10-15 19:53:12,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 19:53:12,072 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 19:53:12,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:12,073 INFO L225 Difference]: With dead ends: 131 [2020-10-15 19:53:12,073 INFO L226 Difference]: Without dead ends: 129 [2020-10-15 19:53:12,073 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2020-10-15 19:53:12,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-15 19:53:12,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 101. [2020-10-15 19:53:12,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-15 19:53:12,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 247 transitions. [2020-10-15 19:53:12,078 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 247 transitions. Word has length 11 [2020-10-15 19:53:12,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:12,079 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 247 transitions. [2020-10-15 19:53:12,079 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 19:53:12,079 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 247 transitions. [2020-10-15 19:53:12,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 19:53:12,079 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:12,079 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:12,280 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-10-15 19:53:12,280 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:12,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:12,280 INFO L82 PathProgramCache]: Analyzing trace with hash 2130066205, now seen corresponding path program 17 times [2020-10-15 19:53:12,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:12,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642504530] [2020-10-15 19:53:12,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:12,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:12,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:12,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642504530] [2020-10-15 19:53:12,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278115552] [2020-10-15 19:53:12,327 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:12,386 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:53:12,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:12,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 19:53:12,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:12,438 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:53:12,445 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:12,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:12,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 19:53:12,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810782079] [2020-10-15 19:53:12,446 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 19:53:12,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:12,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 19:53:12,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-15 19:53:12,447 INFO L87 Difference]: Start difference. First operand 101 states and 247 transitions. Second operand 11 states. [2020-10-15 19:53:12,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:12,561 INFO L93 Difference]: Finished difference Result 131 states and 311 transitions. [2020-10-15 19:53:12,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 19:53:12,562 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 19:53:12,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:12,563 INFO L225 Difference]: With dead ends: 131 [2020-10-15 19:53:12,563 INFO L226 Difference]: Without dead ends: 126 [2020-10-15 19:53:12,563 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:53:12,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-15 19:53:12,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 101. [2020-10-15 19:53:12,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-15 19:53:12,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 247 transitions. [2020-10-15 19:53:12,567 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 247 transitions. Word has length 11 [2020-10-15 19:53:12,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:12,568 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 247 transitions. [2020-10-15 19:53:12,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 19:53:12,568 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 247 transitions. [2020-10-15 19:53:12,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 19:53:12,568 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:12,568 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:12,778 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:12,779 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:12,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:12,779 INFO L82 PathProgramCache]: Analyzing trace with hash 2130067166, now seen corresponding path program 18 times [2020-10-15 19:53:12,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:12,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257387024] [2020-10-15 19:53:12,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:12,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:12,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:12,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257387024] [2020-10-15 19:53:12,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503474966] [2020-10-15 19:53:12,831 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:12,869 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 19:53:12,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:12,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 19:53:12,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:12,925 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:53:12,930 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:12,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:12,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 19:53:12,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134290550] [2020-10-15 19:53:12,931 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 19:53:12,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:12,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 19:53:12,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-15 19:53:12,932 INFO L87 Difference]: Start difference. First operand 101 states and 247 transitions. Second operand 11 states. [2020-10-15 19:53:13,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:13,145 INFO L93 Difference]: Finished difference Result 145 states and 339 transitions. [2020-10-15 19:53:13,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 19:53:13,145 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 19:53:13,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:13,147 INFO L225 Difference]: With dead ends: 145 [2020-10-15 19:53:13,147 INFO L226 Difference]: Without dead ends: 140 [2020-10-15 19:53:13,147 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2020-10-15 19:53:13,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-15 19:53:13,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 99. [2020-10-15 19:53:13,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-15 19:53:13,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 240 transitions. [2020-10-15 19:53:13,152 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 240 transitions. Word has length 11 [2020-10-15 19:53:13,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:13,152 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 240 transitions. [2020-10-15 19:53:13,152 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 19:53:13,152 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 240 transitions. [2020-10-15 19:53:13,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 19:53:13,153 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:13,153 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:13,364 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-10-15 19:53:13,364 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:13,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:13,365 INFO L82 PathProgramCache]: Analyzing trace with hash 2130095996, now seen corresponding path program 19 times [2020-10-15 19:53:13,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:13,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257095971] [2020-10-15 19:53:13,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:13,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:13,412 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:13,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257095971] [2020-10-15 19:53:13,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019531901] [2020-10-15 19:53:13,412 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:13,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:13,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 19:53:13,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:13,519 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:53:13,528 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:13,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:13,529 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 19:53:13,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816571434] [2020-10-15 19:53:13,529 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 19:53:13,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:13,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 19:53:13,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-15 19:53:13,530 INFO L87 Difference]: Start difference. First operand 99 states and 240 transitions. Second operand 11 states. [2020-10-15 19:53:13,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:13,709 INFO L93 Difference]: Finished difference Result 135 states and 315 transitions. [2020-10-15 19:53:13,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 19:53:13,709 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 19:53:13,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:13,711 INFO L225 Difference]: With dead ends: 135 [2020-10-15 19:53:13,711 INFO L226 Difference]: Without dead ends: 130 [2020-10-15 19:53:13,711 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:53:13,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-15 19:53:13,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 98. [2020-10-15 19:53:13,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-15 19:53:13,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 231 transitions. [2020-10-15 19:53:13,714 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 231 transitions. Word has length 11 [2020-10-15 19:53:13,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:13,715 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 231 transitions. [2020-10-15 19:53:13,715 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 19:53:13,715 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 231 transitions. [2020-10-15 19:53:13,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 19:53:13,715 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:13,716 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:13,926 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:13,926 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:13,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:13,927 INFO L82 PathProgramCache]: Analyzing trace with hash -1822274800, now seen corresponding path program 4 times [2020-10-15 19:53:13,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:13,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492229408] [2020-10-15 19:53:13,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:13,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:13,999 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:13,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492229408] [2020-10-15 19:53:13,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33398093] [2020-10-15 19:53:13,999 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:14,047 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:53:14,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:14,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:14,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:14,133 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:53:14,152 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:14,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:14,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-10-15 19:53:14,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361702257] [2020-10-15 19:53:14,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 19:53:14,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:14,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 19:53:14,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-10-15 19:53:14,154 INFO L87 Difference]: Start difference. First operand 98 states and 231 transitions. Second operand 14 states. [2020-10-15 19:53:14,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:14,271 INFO L93 Difference]: Finished difference Result 143 states and 333 transitions. [2020-10-15 19:53:14,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 19:53:14,273 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2020-10-15 19:53:14,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:14,274 INFO L225 Difference]: With dead ends: 143 [2020-10-15 19:53:14,275 INFO L226 Difference]: Without dead ends: 138 [2020-10-15 19:53:14,275 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2020-10-15 19:53:14,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-15 19:53:14,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 105. [2020-10-15 19:53:14,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-15 19:53:14,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 257 transitions. [2020-10-15 19:53:14,281 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 257 transitions. Word has length 11 [2020-10-15 19:53:14,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:14,282 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 257 transitions. [2020-10-15 19:53:14,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 19:53:14,282 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 257 transitions. [2020-10-15 19:53:14,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 19:53:14,282 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:14,283 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:14,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-10-15 19:53:14,494 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:14,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:14,494 INFO L82 PathProgramCache]: Analyzing trace with hash 62604888, now seen corresponding path program 10 times [2020-10-15 19:53:14,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:14,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986090949] [2020-10-15 19:53:14,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:14,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:14,604 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:14,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986090949] [2020-10-15 19:53:14,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178527632] [2020-10-15 19:53:14,605 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 [2020-10-15 19:53:14,649 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:53:14,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:14,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:14,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:14,754 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:14,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:14,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:14,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122943623] [2020-10-15 19:53:14,755 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:14,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:14,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:14,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:14,756 INFO L87 Difference]: Start difference. First operand 105 states and 257 transitions. Second operand 13 states. [2020-10-15 19:53:14,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:14,794 INFO L93 Difference]: Finished difference Result 132 states and 311 transitions. [2020-10-15 19:53:14,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 19:53:14,795 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-15 19:53:14,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:14,796 INFO L225 Difference]: With dead ends: 132 [2020-10-15 19:53:14,796 INFO L226 Difference]: Without dead ends: 129 [2020-10-15 19:53:14,796 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:14,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-15 19:53:14,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 110. [2020-10-15 19:53:14,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-15 19:53:14,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 268 transitions. [2020-10-15 19:53:14,800 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 268 transitions. Word has length 11 [2020-10-15 19:53:14,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:14,800 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 268 transitions. [2020-10-15 19:53:14,800 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:14,800 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 268 transitions. [2020-10-15 19:53:14,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 19:53:14,801 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:14,801 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:15,008 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-10-15 19:53:15,009 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:15,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:15,009 INFO L82 PathProgramCache]: Analyzing trace with hash 727540008, now seen corresponding path program 11 times [2020-10-15 19:53:15,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:15,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587156490] [2020-10-15 19:53:15,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:15,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:15,088 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:15,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587156490] [2020-10-15 19:53:15,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861052571] [2020-10-15 19:53:15,089 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 [2020-10-15 19:53:15,134 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 19:53:15,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:15,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:15,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:15,237 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:15,237 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:15,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:15,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005765597] [2020-10-15 19:53:15,238 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:15,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:15,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:15,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:15,239 INFO L87 Difference]: Start difference. First operand 110 states and 268 transitions. Second operand 13 states. [2020-10-15 19:53:15,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:15,300 INFO L93 Difference]: Finished difference Result 143 states and 332 transitions. [2020-10-15 19:53:15,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 19:53:15,301 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-15 19:53:15,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:15,302 INFO L225 Difference]: With dead ends: 143 [2020-10-15 19:53:15,302 INFO L226 Difference]: Without dead ends: 140 [2020-10-15 19:53:15,303 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-10-15 19:53:15,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-15 19:53:15,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 110. [2020-10-15 19:53:15,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-15 19:53:15,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 268 transitions. [2020-10-15 19:53:15,306 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 268 transitions. Word has length 11 [2020-10-15 19:53:15,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:15,307 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 268 transitions. [2020-10-15 19:53:15,307 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:15,307 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 268 transitions. [2020-10-15 19:53:15,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 19:53:15,307 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:15,308 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:15,508 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-10-15 19:53:15,508 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:15,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:15,508 INFO L82 PathProgramCache]: Analyzing trace with hash 748989528, now seen corresponding path program 12 times [2020-10-15 19:53:15,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:15,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701483487] [2020-10-15 19:53:15,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:15,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:15,573 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:15,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701483487] [2020-10-15 19:53:15,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558650669] [2020-10-15 19:53:15,574 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 [2020-10-15 19:53:15,635 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 19:53:15,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:15,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:15,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:15,753 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:15,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:15,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:15,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019490355] [2020-10-15 19:53:15,755 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:15,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:15,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:15,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:15,756 INFO L87 Difference]: Start difference. First operand 110 states and 268 transitions. Second operand 13 states. [2020-10-15 19:53:15,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:15,861 INFO L93 Difference]: Finished difference Result 142 states and 332 transitions. [2020-10-15 19:53:15,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 19:53:15,862 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-15 19:53:15,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:15,863 INFO L225 Difference]: With dead ends: 142 [2020-10-15 19:53:15,863 INFO L226 Difference]: Without dead ends: 139 [2020-10-15 19:53:15,864 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:15,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-15 19:53:15,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 112. [2020-10-15 19:53:15,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-15 19:53:15,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 275 transitions. [2020-10-15 19:53:15,869 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 275 transitions. Word has length 11 [2020-10-15 19:53:15,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:15,869 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 275 transitions. [2020-10-15 19:53:15,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:15,870 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 275 transitions. [2020-10-15 19:53:15,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 19:53:15,870 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:15,871 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:16,083 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-10-15 19:53:16,083 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:16,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:16,084 INFO L82 PathProgramCache]: Analyzing trace with hash 749681448, now seen corresponding path program 13 times [2020-10-15 19:53:16,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:16,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028250059] [2020-10-15 19:53:16,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:16,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:16,165 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:16,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028250059] [2020-10-15 19:53:16,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934521453] [2020-10-15 19:53:16,166 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 [2020-10-15 19:53:16,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:16,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:16,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:16,344 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:16,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:16,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:16,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126942248] [2020-10-15 19:53:16,345 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:16,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:16,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:16,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:16,346 INFO L87 Difference]: Start difference. First operand 112 states and 275 transitions. Second operand 13 states. [2020-10-15 19:53:16,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:16,470 INFO L93 Difference]: Finished difference Result 141 states and 332 transitions. [2020-10-15 19:53:16,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 19:53:16,471 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-15 19:53:16,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:16,473 INFO L225 Difference]: With dead ends: 141 [2020-10-15 19:53:16,473 INFO L226 Difference]: Without dead ends: 138 [2020-10-15 19:53:16,473 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2020-10-15 19:53:16,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-15 19:53:16,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 114. [2020-10-15 19:53:16,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-15 19:53:16,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 282 transitions. [2020-10-15 19:53:16,479 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 282 transitions. Word has length 11 [2020-10-15 19:53:16,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:16,479 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 282 transitions. [2020-10-15 19:53:16,479 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:16,479 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 282 transitions. [2020-10-15 19:53:16,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 19:53:16,480 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:16,481 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:16,693 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-10-15 19:53:16,693 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:16,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:16,694 INFO L82 PathProgramCache]: Analyzing trace with hash 749703768, now seen corresponding path program 14 times [2020-10-15 19:53:16,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:16,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619201724] [2020-10-15 19:53:16,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:16,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:16,748 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:16,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619201724] [2020-10-15 19:53:16,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891545089] [2020-10-15 19:53:16,749 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 [2020-10-15 19:53:16,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:53:16,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:16,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:16,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:16,865 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:53:16,879 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:16,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:16,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:16,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411147971] [2020-10-15 19:53:16,880 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:16,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:16,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:16,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:16,882 INFO L87 Difference]: Start difference. First operand 114 states and 282 transitions. Second operand 13 states. [2020-10-15 19:53:17,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:17,034 INFO L93 Difference]: Finished difference Result 150 states and 356 transitions. [2020-10-15 19:53:17,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 19:53:17,035 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-15 19:53:17,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:17,036 INFO L225 Difference]: With dead ends: 150 [2020-10-15 19:53:17,036 INFO L226 Difference]: Without dead ends: 144 [2020-10-15 19:53:17,037 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2020-10-15 19:53:17,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-15 19:53:17,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 113. [2020-10-15 19:53:17,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-15 19:53:17,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 282 transitions. [2020-10-15 19:53:17,040 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 282 transitions. Word has length 11 [2020-10-15 19:53:17,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:17,041 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 282 transitions. [2020-10-15 19:53:17,041 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:17,041 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 282 transitions. [2020-10-15 19:53:17,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:17,042 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:17,042 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:17,242 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:17,242 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:17,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:17,243 INFO L82 PathProgramCache]: Analyzing trace with hash 920465749, now seen corresponding path program 20 times [2020-10-15 19:53:17,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:17,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248418760] [2020-10-15 19:53:17,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:17,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:17,322 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:17,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248418760] [2020-10-15 19:53:17,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281106316] [2020-10-15 19:53:17,322 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:17,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:53:17,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:17,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:17,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:17,478 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:17,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:17,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:17,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121951778] [2020-10-15 19:53:17,480 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:17,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:17,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:17,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:17,480 INFO L87 Difference]: Start difference. First operand 113 states and 282 transitions. Second operand 13 states. [2020-10-15 19:53:17,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:17,530 INFO L93 Difference]: Finished difference Result 138 states and 332 transitions. [2020-10-15 19:53:17,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 19:53:17,530 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:17,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:17,532 INFO L225 Difference]: With dead ends: 138 [2020-10-15 19:53:17,532 INFO L226 Difference]: Without dead ends: 136 [2020-10-15 19:53:17,532 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:17,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-15 19:53:17,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 117. [2020-10-15 19:53:17,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-15 19:53:17,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 294 transitions. [2020-10-15 19:53:17,536 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 294 transitions. Word has length 12 [2020-10-15 19:53:17,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:17,536 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 294 transitions. [2020-10-15 19:53:17,536 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:17,536 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 294 transitions. [2020-10-15 19:53:17,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:17,537 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:17,537 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:17,746 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-10-15 19:53:17,747 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:17,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:17,747 INFO L82 PathProgramCache]: Analyzing trace with hash 920466710, now seen corresponding path program 21 times [2020-10-15 19:53:17,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:17,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871477274] [2020-10-15 19:53:17,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:17,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:17,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:17,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871477274] [2020-10-15 19:53:17,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802783985] [2020-10-15 19:53:17,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:17,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 19:53:17,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:17,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:17,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:17,941 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:17,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:17,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:17,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466632874] [2020-10-15 19:53:17,942 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:17,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:17,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:17,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:17,942 INFO L87 Difference]: Start difference. First operand 117 states and 294 transitions. Second operand 13 states. [2020-10-15 19:53:18,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:18,047 INFO L93 Difference]: Finished difference Result 145 states and 346 transitions. [2020-10-15 19:53:18,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 19:53:18,051 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:18,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:18,053 INFO L225 Difference]: With dead ends: 145 [2020-10-15 19:53:18,053 INFO L226 Difference]: Without dead ends: 143 [2020-10-15 19:53:18,053 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2020-10-15 19:53:18,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-15 19:53:18,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 115. [2020-10-15 19:53:18,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-15 19:53:18,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 288 transitions. [2020-10-15 19:53:18,063 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 288 transitions. Word has length 12 [2020-10-15 19:53:18,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:18,063 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 288 transitions. [2020-10-15 19:53:18,063 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:18,064 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 288 transitions. [2020-10-15 19:53:18,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:18,064 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:18,064 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:18,274 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-10-15 19:53:18,274 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:18,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:18,275 INFO L82 PathProgramCache]: Analyzing trace with hash 920495540, now seen corresponding path program 22 times [2020-10-15 19:53:18,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:18,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955887741] [2020-10-15 19:53:18,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:18,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:18,349 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:18,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955887741] [2020-10-15 19:53:18,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155200080] [2020-10-15 19:53:18,350 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:18,395 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:53:18,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:18,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:18,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:18,472 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:18,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:18,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:18,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626708404] [2020-10-15 19:53:18,473 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:18,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:18,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:18,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:18,474 INFO L87 Difference]: Start difference. First operand 115 states and 288 transitions. Second operand 13 states. [2020-10-15 19:53:18,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:18,595 INFO L93 Difference]: Finished difference Result 150 states and 356 transitions. [2020-10-15 19:53:18,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 19:53:18,596 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:18,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:18,597 INFO L225 Difference]: With dead ends: 150 [2020-10-15 19:53:18,597 INFO L226 Difference]: Without dead ends: 148 [2020-10-15 19:53:18,597 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:53:18,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-15 19:53:18,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 116. [2020-10-15 19:53:18,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-15 19:53:18,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 289 transitions. [2020-10-15 19:53:18,601 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 289 transitions. Word has length 12 [2020-10-15 19:53:18,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:18,601 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 289 transitions. [2020-10-15 19:53:18,601 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:18,601 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 289 transitions. [2020-10-15 19:53:18,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:18,602 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:18,602 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:18,812 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:18,813 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:18,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:18,813 INFO L82 PathProgramCache]: Analyzing trace with hash 921389270, now seen corresponding path program 23 times [2020-10-15 19:53:18,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:18,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413011278] [2020-10-15 19:53:18,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:18,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:18,883 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:18,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413011278] [2020-10-15 19:53:18,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229492928] [2020-10-15 19:53:18,884 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:18,923 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 19:53:18,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:18,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:18,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:19,016 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:19,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:19,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:19,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196467028] [2020-10-15 19:53:19,017 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:19,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:19,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:19,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:19,018 INFO L87 Difference]: Start difference. First operand 116 states and 289 transitions. Second operand 13 states. [2020-10-15 19:53:19,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:19,118 INFO L93 Difference]: Finished difference Result 148 states and 352 transitions. [2020-10-15 19:53:19,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 19:53:19,118 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:19,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:19,119 INFO L225 Difference]: With dead ends: 148 [2020-10-15 19:53:19,120 INFO L226 Difference]: Without dead ends: 146 [2020-10-15 19:53:19,120 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:53:19,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-15 19:53:19,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 120. [2020-10-15 19:53:19,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-15 19:53:19,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 299 transitions. [2020-10-15 19:53:19,123 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 299 transitions. Word has length 12 [2020-10-15 19:53:19,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:19,124 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 299 transitions. [2020-10-15 19:53:19,124 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:19,124 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 299 transitions. [2020-10-15 19:53:19,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:19,124 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:19,125 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:19,325 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-10-15 19:53:19,325 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:19,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:19,326 INFO L82 PathProgramCache]: Analyzing trace with hash 921390231, now seen corresponding path program 24 times [2020-10-15 19:53:19,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:19,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112310567] [2020-10-15 19:53:19,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:19,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:19,395 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:19,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112310567] [2020-10-15 19:53:19,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057821958] [2020-10-15 19:53:19,396 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:19,436 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 19:53:19,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:19,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:19,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:19,514 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:19,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:19,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:19,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081970866] [2020-10-15 19:53:19,515 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:19,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:19,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:19,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:19,516 INFO L87 Difference]: Start difference. First operand 120 states and 299 transitions. Second operand 13 states. [2020-10-15 19:53:19,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:19,654 INFO L93 Difference]: Finished difference Result 149 states and 354 transitions. [2020-10-15 19:53:19,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 19:53:19,655 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:19,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:19,656 INFO L225 Difference]: With dead ends: 149 [2020-10-15 19:53:19,656 INFO L226 Difference]: Without dead ends: 147 [2020-10-15 19:53:19,657 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:53:19,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-15 19:53:19,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 118. [2020-10-15 19:53:19,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-15 19:53:19,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 293 transitions. [2020-10-15 19:53:19,661 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 293 transitions. Word has length 12 [2020-10-15 19:53:19,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:19,661 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 293 transitions. [2020-10-15 19:53:19,661 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:19,662 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 293 transitions. [2020-10-15 19:53:19,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:19,662 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:19,663 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:19,873 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:19,873 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:19,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:19,874 INFO L82 PathProgramCache]: Analyzing trace with hash 1557695239, now seen corresponding path program 25 times [2020-10-15 19:53:19,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:19,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865433724] [2020-10-15 19:53:19,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:19,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:19,975 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:19,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865433724] [2020-10-15 19:53:19,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260846339] [2020-10-15 19:53:19,976 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:20,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:20,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:20,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:20,105 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:20,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:20,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:20,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041687685] [2020-10-15 19:53:20,107 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:20,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:20,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:20,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:20,108 INFO L87 Difference]: Start difference. First operand 118 states and 293 transitions. Second operand 13 states. [2020-10-15 19:53:20,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:20,165 INFO L93 Difference]: Finished difference Result 152 states and 360 transitions. [2020-10-15 19:53:20,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 19:53:20,166 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:20,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:20,167 INFO L225 Difference]: With dead ends: 152 [2020-10-15 19:53:20,168 INFO L226 Difference]: Without dead ends: 150 [2020-10-15 19:53:20,168 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-10-15 19:53:20,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-15 19:53:20,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 122. [2020-10-15 19:53:20,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-15 19:53:20,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 305 transitions. [2020-10-15 19:53:20,172 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 305 transitions. Word has length 12 [2020-10-15 19:53:20,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:20,173 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 305 transitions. [2020-10-15 19:53:20,173 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:20,173 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 305 transitions. [2020-10-15 19:53:20,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:20,173 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:20,173 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:20,384 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-10-15 19:53:20,384 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:20,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:20,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1557696200, now seen corresponding path program 26 times [2020-10-15 19:53:20,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:20,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452558651] [2020-10-15 19:53:20,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:20,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:20,461 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:20,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452558651] [2020-10-15 19:53:20,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086052864] [2020-10-15 19:53:20,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:20,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:53:20,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:20,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:20,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:20,607 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:20,608 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:20,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:20,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856739257] [2020-10-15 19:53:20,608 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:20,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:20,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:20,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:20,609 INFO L87 Difference]: Start difference. First operand 122 states and 305 transitions. Second operand 13 states. [2020-10-15 19:53:20,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:20,747 INFO L93 Difference]: Finished difference Result 153 states and 361 transitions. [2020-10-15 19:53:20,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 19:53:20,747 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:20,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:20,749 INFO L225 Difference]: With dead ends: 153 [2020-10-15 19:53:20,749 INFO L226 Difference]: Without dead ends: 151 [2020-10-15 19:53:20,750 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:53:20,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-15 19:53:20,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 120. [2020-10-15 19:53:20,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-15 19:53:20,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 299 transitions. [2020-10-15 19:53:20,754 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 299 transitions. Word has length 12 [2020-10-15 19:53:20,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:20,754 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 299 transitions. [2020-10-15 19:53:20,754 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:20,754 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 299 transitions. [2020-10-15 19:53:20,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:20,755 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:20,755 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:20,965 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-10-15 19:53:20,966 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:20,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:20,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1557725030, now seen corresponding path program 27 times [2020-10-15 19:53:20,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:20,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412071326] [2020-10-15 19:53:20,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:20,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:21,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:21,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412071326] [2020-10-15 19:53:21,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096389069] [2020-10-15 19:53:21,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:21,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 19:53:21,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:21,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:21,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:21,165 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:21,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:21,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:21,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915936286] [2020-10-15 19:53:21,166 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:21,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:21,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:21,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:21,167 INFO L87 Difference]: Start difference. First operand 120 states and 299 transitions. Second operand 13 states. [2020-10-15 19:53:21,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:21,307 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-10-15 19:53:21,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 19:53:21,308 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:21,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:21,309 INFO L225 Difference]: With dead ends: 156 [2020-10-15 19:53:21,309 INFO L226 Difference]: Without dead ends: 154 [2020-10-15 19:53:21,310 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-10-15 19:53:21,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-15 19:53:21,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 119. [2020-10-15 19:53:21,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-15 19:53:21,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 295 transitions. [2020-10-15 19:53:21,317 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 295 transitions. Word has length 12 [2020-10-15 19:53:21,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:21,317 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 295 transitions. [2020-10-15 19:53:21,317 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:21,317 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 295 transitions. [2020-10-15 19:53:21,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:21,318 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:21,318 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:21,521 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-10-15 19:53:21,522 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:21,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:21,522 INFO L82 PathProgramCache]: Analyzing trace with hash 1578251029, now seen corresponding path program 28 times [2020-10-15 19:53:21,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:21,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319429916] [2020-10-15 19:53:21,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:21,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:21,593 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:21,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319429916] [2020-10-15 19:53:21,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128417369] [2020-10-15 19:53:21,594 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:21,633 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:53:21,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:21,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:21,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:21,727 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:21,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:21,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:21,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032494749] [2020-10-15 19:53:21,728 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:21,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:21,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:21,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:21,729 INFO L87 Difference]: Start difference. First operand 119 states and 295 transitions. Second operand 13 states. [2020-10-15 19:53:21,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:21,811 INFO L93 Difference]: Finished difference Result 148 states and 351 transitions. [2020-10-15 19:53:21,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 19:53:21,812 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:21,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:21,813 INFO L225 Difference]: With dead ends: 148 [2020-10-15 19:53:21,813 INFO L226 Difference]: Without dead ends: 146 [2020-10-15 19:53:21,814 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:21,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-15 19:53:21,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 121. [2020-10-15 19:53:21,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-15 19:53:21,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 301 transitions. [2020-10-15 19:53:21,817 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 301 transitions. Word has length 12 [2020-10-15 19:53:21,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:21,818 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 301 transitions. [2020-10-15 19:53:21,818 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:21,818 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 301 transitions. [2020-10-15 19:53:21,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:21,818 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:21,819 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:22,028 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-10-15 19:53:22,029 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:22,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:22,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1578251990, now seen corresponding path program 29 times [2020-10-15 19:53:22,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:22,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617554537] [2020-10-15 19:53:22,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:22,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:22,093 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:22,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617554537] [2020-10-15 19:53:22,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330387666] [2020-10-15 19:53:22,094 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:22,131 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:53:22,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:22,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:22,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:22,226 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:22,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:22,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:22,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766801255] [2020-10-15 19:53:22,227 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:22,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:22,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:22,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:22,228 INFO L87 Difference]: Start difference. First operand 121 states and 301 transitions. Second operand 13 states. [2020-10-15 19:53:22,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:22,388 INFO L93 Difference]: Finished difference Result 157 states and 368 transitions. [2020-10-15 19:53:22,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 19:53:22,388 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:22,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:22,389 INFO L225 Difference]: With dead ends: 157 [2020-10-15 19:53:22,389 INFO L226 Difference]: Without dead ends: 155 [2020-10-15 19:53:22,390 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-10-15 19:53:22,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-15 19:53:22,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 120. [2020-10-15 19:53:22,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-15 19:53:22,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 297 transitions. [2020-10-15 19:53:22,393 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 297 transitions. Word has length 12 [2020-10-15 19:53:22,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:22,395 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 297 transitions. [2020-10-15 19:53:22,395 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:22,395 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 297 transitions. [2020-10-15 19:53:22,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:22,396 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:22,396 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:22,605 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:22,606 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:22,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:22,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1578914119, now seen corresponding path program 30 times [2020-10-15 19:53:22,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:22,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302304851] [2020-10-15 19:53:22,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:22,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:22,678 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:22,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302304851] [2020-10-15 19:53:22,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344199596] [2020-10-15 19:53:22,679 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:22,715 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 19:53:22,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:22,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:53:22,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:22,734 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:22,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:22,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-15 19:53:22,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128401483] [2020-10-15 19:53:22,735 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 19:53:22,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:22,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 19:53:22,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-15 19:53:22,736 INFO L87 Difference]: Start difference. First operand 120 states and 297 transitions. Second operand 9 states. [2020-10-15 19:53:22,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:22,817 INFO L93 Difference]: Finished difference Result 149 states and 350 transitions. [2020-10-15 19:53:22,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 19:53:22,818 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-15 19:53:22,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:22,819 INFO L225 Difference]: With dead ends: 149 [2020-10-15 19:53:22,819 INFO L226 Difference]: Without dead ends: 147 [2020-10-15 19:53:22,819 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2020-10-15 19:53:22,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-15 19:53:22,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 124. [2020-10-15 19:53:22,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-15 19:53:22,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-10-15 19:53:22,823 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-10-15 19:53:22,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:22,823 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-10-15 19:53:22,823 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 19:53:22,824 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-10-15 19:53:22,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:22,824 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:22,824 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:23,024 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-10-15 19:53:23,025 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:23,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:23,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1578936439, now seen corresponding path program 31 times [2020-10-15 19:53:23,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:23,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637138607] [2020-10-15 19:53:23,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:23,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:23,079 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:23,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637138607] [2020-10-15 19:53:23,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114919902] [2020-10-15 19:53:23,080 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:23,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:23,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:23,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:23,220 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:53:23,249 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:23,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:23,250 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:23,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278010484] [2020-10-15 19:53:23,250 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:23,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:23,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:23,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:23,251 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-10-15 19:53:23,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:23,494 INFO L93 Difference]: Finished difference Result 164 states and 389 transitions. [2020-10-15 19:53:23,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 19:53:23,494 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:23,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:23,496 INFO L225 Difference]: With dead ends: 164 [2020-10-15 19:53:23,496 INFO L226 Difference]: Without dead ends: 159 [2020-10-15 19:53:23,497 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-10-15 19:53:23,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-15 19:53:23,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2020-10-15 19:53:23,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-15 19:53:23,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 296 transitions. [2020-10-15 19:53:23,500 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 296 transitions. Word has length 12 [2020-10-15 19:53:23,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:23,501 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 296 transitions. [2020-10-15 19:53:23,501 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:23,501 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 296 transitions. [2020-10-15 19:53:23,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:23,501 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:23,501 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:23,702 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-10-15 19:53:23,703 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:23,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:23,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1578943910, now seen corresponding path program 32 times [2020-10-15 19:53:23,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:23,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283456530] [2020-10-15 19:53:23,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:23,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:23,761 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:23,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283456530] [2020-10-15 19:53:23,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530626082] [2020-10-15 19:53:23,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:23,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:53:23,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:23,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:23,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:23,909 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:23,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:23,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:23,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997058325] [2020-10-15 19:53:23,910 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:23,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:23,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:23,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:23,911 INFO L87 Difference]: Start difference. First operand 122 states and 296 transitions. Second operand 13 states. [2020-10-15 19:53:24,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:24,095 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-10-15 19:53:24,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 19:53:24,096 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:24,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:24,097 INFO L225 Difference]: With dead ends: 156 [2020-10-15 19:53:24,097 INFO L226 Difference]: Without dead ends: 154 [2020-10-15 19:53:24,097 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2020-10-15 19:53:24,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-15 19:53:24,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 124. [2020-10-15 19:53:24,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-15 19:53:24,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-10-15 19:53:24,101 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-10-15 19:53:24,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:24,102 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-10-15 19:53:24,102 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:24,102 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-10-15 19:53:24,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:24,103 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:24,103 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:24,305 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:24,306 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:24,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:24,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1578965269, now seen corresponding path program 33 times [2020-10-15 19:53:24,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:24,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982902485] [2020-10-15 19:53:24,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:24,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:24,365 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:24,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982902485] [2020-10-15 19:53:24,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137862587] [2020-10-15 19:53:24,366 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:24,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 19:53:24,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:24,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:24,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:24,499 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:53:24,532 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:24,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:24,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:24,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130574038] [2020-10-15 19:53:24,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:24,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:24,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:24,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:24,534 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-10-15 19:53:24,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:24,886 INFO L93 Difference]: Finished difference Result 176 states and 416 transitions. [2020-10-15 19:53:24,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 19:53:24,887 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:24,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:24,889 INFO L225 Difference]: With dead ends: 176 [2020-10-15 19:53:24,889 INFO L226 Difference]: Without dead ends: 171 [2020-10-15 19:53:24,890 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=186, Invalid=366, Unknown=0, NotChecked=0, Total=552 [2020-10-15 19:53:24,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-15 19:53:24,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 124. [2020-10-15 19:53:24,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-15 19:53:24,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-10-15 19:53:24,894 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-10-15 19:53:24,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:24,894 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-10-15 19:53:24,894 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:24,894 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-10-15 19:53:24,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:24,895 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:24,895 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:25,106 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2020-10-15 19:53:25,107 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:25,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:25,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1578966230, now seen corresponding path program 34 times [2020-10-15 19:53:25,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:25,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046110122] [2020-10-15 19:53:25,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:25,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:25,167 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:25,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046110122] [2020-10-15 19:53:25,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534167214] [2020-10-15 19:53:25,167 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:25,233 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:53:25,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:25,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:25,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:25,310 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:53:25,354 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:25,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:25,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:25,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490022776] [2020-10-15 19:53:25,355 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:25,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:25,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:25,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:25,356 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-10-15 19:53:25,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:25,603 INFO L93 Difference]: Finished difference Result 166 states and 393 transitions. [2020-10-15 19:53:25,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 19:53:25,603 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:25,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:25,605 INFO L225 Difference]: With dead ends: 166 [2020-10-15 19:53:25,605 INFO L226 Difference]: Without dead ends: 161 [2020-10-15 19:53:25,605 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-10-15 19:53:25,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-15 19:53:25,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 121. [2020-10-15 19:53:25,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-15 19:53:25,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 294 transitions. [2020-10-15 19:53:25,609 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 294 transitions. Word has length 12 [2020-10-15 19:53:25,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:25,609 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 294 transitions. [2020-10-15 19:53:25,609 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:25,609 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 294 transitions. [2020-10-15 19:53:25,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:25,610 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:25,610 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:25,816 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:25,817 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:25,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:25,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1579174550, now seen corresponding path program 35 times [2020-10-15 19:53:25,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:25,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634269241] [2020-10-15 19:53:25,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:25,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:25,871 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:25,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634269241] [2020-10-15 19:53:25,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855488481] [2020-10-15 19:53:25,872 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:25,912 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:53:25,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:25,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:25,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:26,024 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:26,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:26,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:26,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346364787] [2020-10-15 19:53:26,026 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:26,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:26,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:26,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:26,027 INFO L87 Difference]: Start difference. First operand 121 states and 294 transitions. Second operand 13 states. [2020-10-15 19:53:26,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:26,235 INFO L93 Difference]: Finished difference Result 163 states and 379 transitions. [2020-10-15 19:53:26,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 19:53:26,236 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:26,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:26,237 INFO L225 Difference]: With dead ends: 163 [2020-10-15 19:53:26,237 INFO L226 Difference]: Without dead ends: 161 [2020-10-15 19:53:26,238 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-10-15 19:53:26,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-15 19:53:26,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 123. [2020-10-15 19:53:26,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-15 19:53:26,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 301 transitions. [2020-10-15 19:53:26,243 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 301 transitions. Word has length 12 [2020-10-15 19:53:26,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:26,244 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 301 transitions. [2020-10-15 19:53:26,244 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:26,244 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 301 transitions. [2020-10-15 19:53:26,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:26,245 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:26,245 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:26,457 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-10-15 19:53:26,457 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:26,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:26,458 INFO L82 PathProgramCache]: Analyzing trace with hash 1579837640, now seen corresponding path program 36 times [2020-10-15 19:53:26,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:26,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652438820] [2020-10-15 19:53:26,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:26,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:26,527 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:26,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652438820] [2020-10-15 19:53:26,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923898548] [2020-10-15 19:53:26,528 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:26,563 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 19:53:26,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:26,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:26,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:26,640 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:26,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:26,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:26,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354980819] [2020-10-15 19:53:26,641 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:26,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:26,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:26,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:26,642 INFO L87 Difference]: Start difference. First operand 123 states and 301 transitions. Second operand 13 states. [2020-10-15 19:53:26,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:26,885 INFO L93 Difference]: Finished difference Result 170 states and 399 transitions. [2020-10-15 19:53:26,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 19:53:26,886 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:26,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:26,887 INFO L225 Difference]: With dead ends: 170 [2020-10-15 19:53:26,887 INFO L226 Difference]: Without dead ends: 168 [2020-10-15 19:53:26,888 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=149, Invalid=313, Unknown=0, NotChecked=0, Total=462 [2020-10-15 19:53:26,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-10-15 19:53:26,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 125. [2020-10-15 19:53:26,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-15 19:53:26,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 308 transitions. [2020-10-15 19:53:26,891 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 308 transitions. Word has length 12 [2020-10-15 19:53:26,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:26,892 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 308 transitions. [2020-10-15 19:53:26,892 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:26,892 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 308 transitions. [2020-10-15 19:53:26,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:26,892 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:26,892 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:27,093 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:27,093 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:27,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:27,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1579858999, now seen corresponding path program 37 times [2020-10-15 19:53:27,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:27,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650962942] [2020-10-15 19:53:27,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:27,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:27,142 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:27,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650962942] [2020-10-15 19:53:27,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583768962] [2020-10-15 19:53:27,143 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:27,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:27,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:27,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:27,246 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:53:27,253 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:27,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:27,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:27,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507837519] [2020-10-15 19:53:27,254 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:27,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:27,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:27,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:27,255 INFO L87 Difference]: Start difference. First operand 125 states and 308 transitions. Second operand 13 states. [2020-10-15 19:53:27,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:27,552 INFO L93 Difference]: Finished difference Result 177 states and 424 transitions. [2020-10-15 19:53:27,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 19:53:27,553 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:27,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:27,554 INFO L225 Difference]: With dead ends: 177 [2020-10-15 19:53:27,554 INFO L226 Difference]: Without dead ends: 172 [2020-10-15 19:53:27,555 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-10-15 19:53:27,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-15 19:53:27,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 126. [2020-10-15 19:53:27,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-15 19:53:27,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 313 transitions. [2020-10-15 19:53:27,559 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 313 transitions. Word has length 12 [2020-10-15 19:53:27,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:27,559 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 313 transitions. [2020-10-15 19:53:27,559 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:27,559 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 313 transitions. [2020-10-15 19:53:27,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:27,560 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:27,560 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:27,770 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-10-15 19:53:27,770 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:27,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:27,771 INFO L82 PathProgramCache]: Analyzing trace with hash 1579859960, now seen corresponding path program 38 times [2020-10-15 19:53:27,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:27,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120270000] [2020-10-15 19:53:27,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:27,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:27,829 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:27,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120270000] [2020-10-15 19:53:27,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877900278] [2020-10-15 19:53:27,830 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:27,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:53:27,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:27,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:27,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:27,948 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:53:27,955 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:27,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:27,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:27,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59523062] [2020-10-15 19:53:27,956 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:27,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:27,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:27,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:27,957 INFO L87 Difference]: Start difference. First operand 126 states and 313 transitions. Second operand 13 states. [2020-10-15 19:53:28,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:28,312 INFO L93 Difference]: Finished difference Result 190 states and 454 transitions. [2020-10-15 19:53:28,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 19:53:28,313 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:28,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:28,314 INFO L225 Difference]: With dead ends: 190 [2020-10-15 19:53:28,315 INFO L226 Difference]: Without dead ends: 182 [2020-10-15 19:53:28,315 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-10-15 19:53:28,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-15 19:53:28,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 121. [2020-10-15 19:53:28,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-15 19:53:28,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 297 transitions. [2020-10-15 19:53:28,319 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 297 transitions. Word has length 12 [2020-10-15 19:53:28,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:28,319 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 297 transitions. [2020-10-15 19:53:28,319 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:28,319 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 297 transitions. [2020-10-15 19:53:28,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:28,319 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:28,320 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:28,528 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-10-15 19:53:28,528 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:28,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:28,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1579888790, now seen corresponding path program 39 times [2020-10-15 19:53:28,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:28,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402214714] [2020-10-15 19:53:28,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:28,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:28,578 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:28,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402214714] [2020-10-15 19:53:28,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680714488] [2020-10-15 19:53:28,579 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:28,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 19:53:28,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:28,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:28,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:28,711 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:53:28,723 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:28,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:28,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:28,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379755461] [2020-10-15 19:53:28,724 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:28,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:28,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:28,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:28,725 INFO L87 Difference]: Start difference. First operand 121 states and 297 transitions. Second operand 13 states. [2020-10-15 19:53:29,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:29,055 INFO L93 Difference]: Finished difference Result 180 states and 427 transitions. [2020-10-15 19:53:29,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 19:53:29,055 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:29,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:29,057 INFO L225 Difference]: With dead ends: 180 [2020-10-15 19:53:29,057 INFO L226 Difference]: Without dead ends: 175 [2020-10-15 19:53:29,057 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2020-10-15 19:53:29,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-15 19:53:29,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 120. [2020-10-15 19:53:29,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-15 19:53:29,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 292 transitions. [2020-10-15 19:53:29,061 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 292 transitions. Word has length 12 [2020-10-15 19:53:29,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:29,061 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 292 transitions. [2020-10-15 19:53:29,062 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:29,062 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 292 transitions. [2020-10-15 19:53:29,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:29,062 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:29,063 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:29,263 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-10-15 19:53:29,263 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:29,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:29,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1586324390, now seen corresponding path program 40 times [2020-10-15 19:53:29,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:29,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261017053] [2020-10-15 19:53:29,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:29,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:29,325 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:29,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261017053] [2020-10-15 19:53:29,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820902315] [2020-10-15 19:53:29,326 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:29,371 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:53:29,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:29,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:29,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:29,479 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:29,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:29,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:29,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260020752] [2020-10-15 19:53:29,480 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:29,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:29,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:29,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:29,481 INFO L87 Difference]: Start difference. First operand 120 states and 292 transitions. Second operand 13 states. [2020-10-15 19:53:29,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:29,621 INFO L93 Difference]: Finished difference Result 164 states and 379 transitions. [2020-10-15 19:53:29,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 19:53:29,622 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:29,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:29,623 INFO L225 Difference]: With dead ends: 164 [2020-10-15 19:53:29,623 INFO L226 Difference]: Without dead ends: 162 [2020-10-15 19:53:29,624 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2020-10-15 19:53:29,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-15 19:53:29,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 121. [2020-10-15 19:53:29,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-15 19:53:29,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 295 transitions. [2020-10-15 19:53:29,631 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 295 transitions. Word has length 12 [2020-10-15 19:53:29,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:29,631 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 295 transitions. [2020-10-15 19:53:29,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:29,632 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 295 transitions. [2020-10-15 19:53:29,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:29,632 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:29,632 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:29,842 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-10-15 19:53:29,843 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:29,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:29,843 INFO L82 PathProgramCache]: Analyzing trace with hash 1586325351, now seen corresponding path program 41 times [2020-10-15 19:53:29,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:29,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948525923] [2020-10-15 19:53:29,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:29,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:29,898 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:29,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948525923] [2020-10-15 19:53:29,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377750013] [2020-10-15 19:53:29,899 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:29,964 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:53:29,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:29,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:29,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:30,067 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:30,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:30,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:30,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012181397] [2020-10-15 19:53:30,067 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:30,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:30,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:30,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:30,068 INFO L87 Difference]: Start difference. First operand 121 states and 295 transitions. Second operand 13 states. [2020-10-15 19:53:30,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:30,195 INFO L93 Difference]: Finished difference Result 161 states and 372 transitions. [2020-10-15 19:53:30,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 19:53:30,195 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:30,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:30,197 INFO L225 Difference]: With dead ends: 161 [2020-10-15 19:53:30,197 INFO L226 Difference]: Without dead ends: 159 [2020-10-15 19:53:30,197 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-10-15 19:53:30,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-15 19:53:30,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 118. [2020-10-15 19:53:30,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-15 19:53:30,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 287 transitions. [2020-10-15 19:53:30,200 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 287 transitions. Word has length 12 [2020-10-15 19:53:30,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:30,202 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 287 transitions. [2020-10-15 19:53:30,202 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:30,202 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 287 transitions. [2020-10-15 19:53:30,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:30,202 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:30,202 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:30,410 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-10-15 19:53:30,411 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:30,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:30,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1606880180, now seen corresponding path program 42 times [2020-10-15 19:53:30,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:30,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583716504] [2020-10-15 19:53:30,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:30,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:30,461 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:30,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583716504] [2020-10-15 19:53:30,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984569927] [2020-10-15 19:53:30,461 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:30,499 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 19:53:30,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:30,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:30,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:30,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:30,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:30,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:30,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65994953] [2020-10-15 19:53:30,599 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:30,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:30,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:30,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:30,600 INFO L87 Difference]: Start difference. First operand 118 states and 287 transitions. Second operand 13 states. [2020-10-15 19:53:30,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:30,804 INFO L93 Difference]: Finished difference Result 165 states and 380 transitions. [2020-10-15 19:53:30,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 19:53:30,805 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:30,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:30,806 INFO L225 Difference]: With dead ends: 165 [2020-10-15 19:53:30,806 INFO L226 Difference]: Without dead ends: 163 [2020-10-15 19:53:30,807 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2020-10-15 19:53:30,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-15 19:53:30,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 118. [2020-10-15 19:53:30,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-15 19:53:30,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 290 transitions. [2020-10-15 19:53:30,810 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 290 transitions. Word has length 12 [2020-10-15 19:53:30,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:30,810 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 290 transitions. [2020-10-15 19:53:30,810 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:30,810 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 290 transitions. [2020-10-15 19:53:30,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:30,811 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:30,811 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:31,011 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2020-10-15 19:53:31,012 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:31,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:31,012 INFO L82 PathProgramCache]: Analyzing trace with hash 1606881141, now seen corresponding path program 43 times [2020-10-15 19:53:31,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:31,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141341855] [2020-10-15 19:53:31,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:31,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:31,065 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:31,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141341855] [2020-10-15 19:53:31,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487408543] [2020-10-15 19:53:31,066 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:31,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:31,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:31,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:31,190 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:31,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:31,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:31,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391165592] [2020-10-15 19:53:31,192 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:31,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:31,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:31,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:31,192 INFO L87 Difference]: Start difference. First operand 118 states and 290 transitions. Second operand 13 states. [2020-10-15 19:53:31,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:31,393 INFO L93 Difference]: Finished difference Result 167 states and 384 transitions. [2020-10-15 19:53:31,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 19:53:31,394 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:31,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:31,395 INFO L225 Difference]: With dead ends: 167 [2020-10-15 19:53:31,395 INFO L226 Difference]: Without dead ends: 165 [2020-10-15 19:53:31,396 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2020-10-15 19:53:31,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-15 19:53:31,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 118. [2020-10-15 19:53:31,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-15 19:53:31,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 289 transitions. [2020-10-15 19:53:31,399 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 289 transitions. Word has length 12 [2020-10-15 19:53:31,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:31,400 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 289 transitions. [2020-10-15 19:53:31,400 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:31,400 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 289 transitions. [2020-10-15 19:53:31,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:31,400 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:31,400 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:31,610 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:31,611 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:31,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:31,611 INFO L82 PathProgramCache]: Analyzing trace with hash 1607543270, now seen corresponding path program 44 times [2020-10-15 19:53:31,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:31,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849766258] [2020-10-15 19:53:31,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:31,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:31,664 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:31,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849766258] [2020-10-15 19:53:31,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054519311] [2020-10-15 19:53:31,665 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:31,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:53:31,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:31,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:31,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:31,792 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:31,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:31,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:31,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132268021] [2020-10-15 19:53:31,793 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:31,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:31,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:31,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:31,794 INFO L87 Difference]: Start difference. First operand 118 states and 289 transitions. Second operand 13 states. [2020-10-15 19:53:32,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:32,042 INFO L93 Difference]: Finished difference Result 168 states and 392 transitions. [2020-10-15 19:53:32,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 19:53:32,042 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:32,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:32,044 INFO L225 Difference]: With dead ends: 168 [2020-10-15 19:53:32,044 INFO L226 Difference]: Without dead ends: 166 [2020-10-15 19:53:32,044 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=157, Invalid=349, Unknown=0, NotChecked=0, Total=506 [2020-10-15 19:53:32,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-15 19:53:32,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 120. [2020-10-15 19:53:32,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-15 19:53:32,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 296 transitions. [2020-10-15 19:53:32,047 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 296 transitions. Word has length 12 [2020-10-15 19:53:32,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:32,047 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 296 transitions. [2020-10-15 19:53:32,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:32,047 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 296 transitions. [2020-10-15 19:53:32,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:32,048 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:32,048 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:32,248 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:32,249 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:32,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:32,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1607564629, now seen corresponding path program 45 times [2020-10-15 19:53:32,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:32,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248156111] [2020-10-15 19:53:32,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:32,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:32,304 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:32,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248156111] [2020-10-15 19:53:32,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845119210] [2020-10-15 19:53:32,305 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:32,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 19:53:32,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:32,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:32,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:32,409 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:53:32,416 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:32,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:32,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:32,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667903141] [2020-10-15 19:53:32,417 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:32,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:32,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:32,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:32,418 INFO L87 Difference]: Start difference. First operand 120 states and 296 transitions. Second operand 13 states. [2020-10-15 19:53:32,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:32,619 INFO L93 Difference]: Finished difference Result 160 states and 384 transitions. [2020-10-15 19:53:32,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 19:53:32,620 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:32,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:32,621 INFO L225 Difference]: With dead ends: 160 [2020-10-15 19:53:32,621 INFO L226 Difference]: Without dead ends: 155 [2020-10-15 19:53:32,622 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-10-15 19:53:32,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-15 19:53:32,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 121. [2020-10-15 19:53:32,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-15 19:53:32,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 301 transitions. [2020-10-15 19:53:32,625 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 301 transitions. Word has length 12 [2020-10-15 19:53:32,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:32,625 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 301 transitions. [2020-10-15 19:53:32,625 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:32,626 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 301 transitions. [2020-10-15 19:53:32,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:32,626 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:32,626 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:32,828 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:32,829 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:32,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:32,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1607565590, now seen corresponding path program 46 times [2020-10-15 19:53:32,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:32,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503244199] [2020-10-15 19:53:32,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:32,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:32,886 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:32,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503244199] [2020-10-15 19:53:32,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641694791] [2020-10-15 19:53:32,887 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:32,929 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:53:32,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:32,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:32,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:32,999 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:53:33,032 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:33,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:33,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:33,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325872980] [2020-10-15 19:53:33,033 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:33,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:33,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:33,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:33,033 INFO L87 Difference]: Start difference. First operand 121 states and 301 transitions. Second operand 13 states. [2020-10-15 19:53:33,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:33,353 INFO L93 Difference]: Finished difference Result 189 states and 444 transitions. [2020-10-15 19:53:33,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 19:53:33,353 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:33,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:33,355 INFO L225 Difference]: With dead ends: 189 [2020-10-15 19:53:33,355 INFO L226 Difference]: Without dead ends: 181 [2020-10-15 19:53:33,355 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2020-10-15 19:53:33,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-10-15 19:53:33,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 118. [2020-10-15 19:53:33,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-15 19:53:33,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 289 transitions. [2020-10-15 19:53:33,358 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 289 transitions. Word has length 12 [2020-10-15 19:53:33,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:33,358 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 289 transitions. [2020-10-15 19:53:33,359 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:33,359 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 289 transitions. [2020-10-15 19:53:33,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:33,359 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:33,359 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:33,567 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:33,568 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:33,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:33,568 INFO L82 PathProgramCache]: Analyzing trace with hash 1607573061, now seen corresponding path program 47 times [2020-10-15 19:53:33,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:33,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033424221] [2020-10-15 19:53:33,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:33,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:33,621 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:33,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033424221] [2020-10-15 19:53:33,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870032985] [2020-10-15 19:53:33,622 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:33,659 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:53:33,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:33,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:33,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:33,747 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:33,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:33,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:33,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269189028] [2020-10-15 19:53:33,748 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:33,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:33,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:33,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:33,748 INFO L87 Difference]: Start difference. First operand 118 states and 289 transitions. Second operand 13 states. [2020-10-15 19:53:33,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:33,991 INFO L93 Difference]: Finished difference Result 169 states and 393 transitions. [2020-10-15 19:53:33,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 19:53:33,991 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:33,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:33,993 INFO L225 Difference]: With dead ends: 169 [2020-10-15 19:53:33,993 INFO L226 Difference]: Without dead ends: 167 [2020-10-15 19:53:33,993 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-10-15 19:53:33,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-15 19:53:33,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 120. [2020-10-15 19:53:33,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-15 19:53:33,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 296 transitions. [2020-10-15 19:53:33,996 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 296 transitions. Word has length 12 [2020-10-15 19:53:33,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:33,996 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 296 transitions. [2020-10-15 19:53:33,996 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:33,997 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 296 transitions. [2020-10-15 19:53:33,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:33,997 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:33,997 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:34,198 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2020-10-15 19:53:34,199 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:34,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:34,199 INFO L82 PathProgramCache]: Analyzing trace with hash 1607594420, now seen corresponding path program 48 times [2020-10-15 19:53:34,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:34,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564733006] [2020-10-15 19:53:34,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:34,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:34,256 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:34,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564733006] [2020-10-15 19:53:34,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230930787] [2020-10-15 19:53:34,257 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:34,292 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 19:53:34,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:34,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:34,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:34,365 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:53:34,373 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:34,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:34,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:34,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359702059] [2020-10-15 19:53:34,374 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:34,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:34,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:34,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:34,374 INFO L87 Difference]: Start difference. First operand 120 states and 296 transitions. Second operand 13 states. [2020-10-15 19:53:34,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:34,714 INFO L93 Difference]: Finished difference Result 192 states and 454 transitions. [2020-10-15 19:53:34,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 19:53:34,715 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:34,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:34,716 INFO L225 Difference]: With dead ends: 192 [2020-10-15 19:53:34,717 INFO L226 Difference]: Without dead ends: 184 [2020-10-15 19:53:34,717 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-10-15 19:53:34,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-10-15 19:53:34,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 119. [2020-10-15 19:53:34,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-15 19:53:34,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 287 transitions. [2020-10-15 19:53:34,721 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 287 transitions. Word has length 12 [2020-10-15 19:53:34,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:34,721 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 287 transitions. [2020-10-15 19:53:34,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:34,722 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 287 transitions. [2020-10-15 19:53:34,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:34,722 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:34,722 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:34,925 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:34,925 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:34,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:34,926 INFO L82 PathProgramCache]: Analyzing trace with hash 1607595381, now seen corresponding path program 49 times [2020-10-15 19:53:34,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:34,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388232937] [2020-10-15 19:53:34,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:34,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:34,979 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:34,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388232937] [2020-10-15 19:53:34,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815598545] [2020-10-15 19:53:34,980 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:35,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:35,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:35,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:35,084 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:53:35,097 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:35,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:35,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:35,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430242775] [2020-10-15 19:53:35,099 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:35,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:35,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:35,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:35,099 INFO L87 Difference]: Start difference. First operand 119 states and 287 transitions. Second operand 13 states. [2020-10-15 19:53:35,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:35,413 INFO L93 Difference]: Finished difference Result 180 states and 420 transitions. [2020-10-15 19:53:35,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 19:53:35,414 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:35,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:35,415 INFO L225 Difference]: With dead ends: 180 [2020-10-15 19:53:35,415 INFO L226 Difference]: Without dead ends: 175 [2020-10-15 19:53:35,416 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-10-15 19:53:35,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-15 19:53:35,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 114. [2020-10-15 19:53:35,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-15 19:53:35,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 268 transitions. [2020-10-15 19:53:35,419 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 268 transitions. Word has length 12 [2020-10-15 19:53:35,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:35,420 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 268 transitions. [2020-10-15 19:53:35,420 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:35,420 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 268 transitions. [2020-10-15 19:53:35,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:35,420 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:35,420 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:35,630 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2020-10-15 19:53:35,630 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:35,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:35,631 INFO L82 PathProgramCache]: Analyzing trace with hash -655922238, now seen corresponding path program 5 times [2020-10-15 19:53:35,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:35,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305950999] [2020-10-15 19:53:35,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:35,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:35,704 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:35,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305950999] [2020-10-15 19:53:35,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891191041] [2020-10-15 19:53:35,705 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:35,743 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 19:53:35,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:35,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:35,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:35,846 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:53:35,867 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:35,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:35,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-10-15 19:53:35,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055518921] [2020-10-15 19:53:35,868 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 19:53:35,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:35,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 19:53:35,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2020-10-15 19:53:35,869 INFO L87 Difference]: Start difference. First operand 114 states and 268 transitions. Second operand 16 states. [2020-10-15 19:53:36,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:36,010 INFO L93 Difference]: Finished difference Result 164 states and 382 transitions. [2020-10-15 19:53:36,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 19:53:36,011 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 12 [2020-10-15 19:53:36,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:36,012 INFO L225 Difference]: With dead ends: 164 [2020-10-15 19:53:36,013 INFO L226 Difference]: Without dead ends: 159 [2020-10-15 19:53:36,013 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=147, Invalid=315, Unknown=0, NotChecked=0, Total=462 [2020-10-15 19:53:36,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-15 19:53:36,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2020-10-15 19:53:36,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-15 19:53:36,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 299 transitions. [2020-10-15 19:53:36,016 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 299 transitions. Word has length 12 [2020-10-15 19:53:36,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:36,016 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 299 transitions. [2020-10-15 19:53:36,016 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 19:53:36,016 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 299 transitions. [2020-10-15 19:53:36,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:36,016 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:36,017 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:36,217 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:36,217 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:36,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:36,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1940751883, now seen corresponding path program 15 times [2020-10-15 19:53:36,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:36,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536873476] [2020-10-15 19:53:36,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:36,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:36,328 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:36,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536873476] [2020-10-15 19:53:36,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515852805] [2020-10-15 19:53:36,329 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:36,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 19:53:36,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:36,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:36,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:36,485 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:36,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:36,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:36,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107983098] [2020-10-15 19:53:36,486 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:36,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:36,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:36,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:36,487 INFO L87 Difference]: Start difference. First operand 122 states and 299 transitions. Second operand 15 states. [2020-10-15 19:53:36,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:36,542 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-10-15 19:53:36,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 19:53:36,543 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-15 19:53:36,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:36,544 INFO L225 Difference]: With dead ends: 156 [2020-10-15 19:53:36,544 INFO L226 Difference]: Without dead ends: 153 [2020-10-15 19:53:36,545 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:36,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-15 19:53:36,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 129. [2020-10-15 19:53:36,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-15 19:53:36,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 315 transitions. [2020-10-15 19:53:36,549 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 315 transitions. Word has length 12 [2020-10-15 19:53:36,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:36,549 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 315 transitions. [2020-10-15 19:53:36,549 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:36,549 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 315 transitions. [2020-10-15 19:53:36,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:36,550 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:36,550 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:36,750 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-10-15 19:53:36,751 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:36,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:36,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1078904123, now seen corresponding path program 16 times [2020-10-15 19:53:36,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:36,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323531248] [2020-10-15 19:53:36,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:36,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:36,864 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:36,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323531248] [2020-10-15 19:53:36,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709743289] [2020-10-15 19:53:36,865 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:36,903 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:53:36,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:36,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:36,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:37,017 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:37,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:37,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:37,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712962677] [2020-10-15 19:53:37,018 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:37,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:37,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:37,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:37,019 INFO L87 Difference]: Start difference. First operand 129 states and 315 transitions. Second operand 15 states. [2020-10-15 19:53:37,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:37,093 INFO L93 Difference]: Finished difference Result 170 states and 394 transitions. [2020-10-15 19:53:37,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 19:53:37,093 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-15 19:53:37,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:37,095 INFO L225 Difference]: With dead ends: 170 [2020-10-15 19:53:37,095 INFO L226 Difference]: Without dead ends: 167 [2020-10-15 19:53:37,096 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2020-10-15 19:53:37,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-15 19:53:37,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 129. [2020-10-15 19:53:37,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-15 19:53:37,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 315 transitions. [2020-10-15 19:53:37,101 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 315 transitions. Word has length 12 [2020-10-15 19:53:37,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:37,104 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 315 transitions. [2020-10-15 19:53:37,104 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:37,104 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 315 transitions. [2020-10-15 19:53:37,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:37,105 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:37,105 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:37,305 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:37,306 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:37,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:37,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1743839243, now seen corresponding path program 17 times [2020-10-15 19:53:37,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:37,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651088250] [2020-10-15 19:53:37,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:37,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:37,396 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:37,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651088250] [2020-10-15 19:53:37,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928710696] [2020-10-15 19:53:37,397 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:37,435 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 19:53:37,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:37,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:37,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:37,546 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:37,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:37,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:37,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399235202] [2020-10-15 19:53:37,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:37,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:37,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:37,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:37,548 INFO L87 Difference]: Start difference. First operand 129 states and 315 transitions. Second operand 15 states. [2020-10-15 19:53:37,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:37,630 INFO L93 Difference]: Finished difference Result 169 states and 394 transitions. [2020-10-15 19:53:37,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 19:53:37,631 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-15 19:53:37,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:37,632 INFO L225 Difference]: With dead ends: 169 [2020-10-15 19:53:37,632 INFO L226 Difference]: Without dead ends: 166 [2020-10-15 19:53:37,633 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:53:37,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-15 19:53:37,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 130. [2020-10-15 19:53:37,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-15 19:53:37,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 320 transitions. [2020-10-15 19:53:37,636 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 320 transitions. Word has length 12 [2020-10-15 19:53:37,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:37,636 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 320 transitions. [2020-10-15 19:53:37,636 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:37,636 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 320 transitions. [2020-10-15 19:53:37,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:37,637 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:37,637 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:37,837 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:37,838 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:37,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:37,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1765288763, now seen corresponding path program 18 times [2020-10-15 19:53:37,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:37,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263017509] [2020-10-15 19:53:37,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:37,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:37,921 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:37,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263017509] [2020-10-15 19:53:37,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191989453] [2020-10-15 19:53:37,922 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:37,978 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 19:53:37,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:37,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:37,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:38,109 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:38,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:38,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:38,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837715790] [2020-10-15 19:53:38,110 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:38,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:38,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:38,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:38,110 INFO L87 Difference]: Start difference. First operand 130 states and 320 transitions. Second operand 15 states. [2020-10-15 19:53:38,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:38,203 INFO L93 Difference]: Finished difference Result 168 states and 394 transitions. [2020-10-15 19:53:38,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 19:53:38,203 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-15 19:53:38,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:38,204 INFO L225 Difference]: With dead ends: 168 [2020-10-15 19:53:38,205 INFO L226 Difference]: Without dead ends: 165 [2020-10-15 19:53:38,205 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2020-10-15 19:53:38,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-15 19:53:38,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 132. [2020-10-15 19:53:38,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-15 19:53:38,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 327 transitions. [2020-10-15 19:53:38,211 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 327 transitions. Word has length 12 [2020-10-15 19:53:38,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:38,211 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 327 transitions. [2020-10-15 19:53:38,211 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:38,211 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 327 transitions. [2020-10-15 19:53:38,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:38,212 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:38,212 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:38,412 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2020-10-15 19:53:38,413 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:38,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:38,413 INFO L82 PathProgramCache]: Analyzing trace with hash 1765980683, now seen corresponding path program 19 times [2020-10-15 19:53:38,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:38,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620400962] [2020-10-15 19:53:38,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:38,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:38,485 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:38,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620400962] [2020-10-15 19:53:38,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371020441] [2020-10-15 19:53:38,486 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:38,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:38,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:38,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:38,628 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:38,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:38,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:38,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118932566] [2020-10-15 19:53:38,629 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:38,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:38,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:38,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:38,630 INFO L87 Difference]: Start difference. First operand 132 states and 327 transitions. Second operand 15 states. [2020-10-15 19:53:38,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:38,758 INFO L93 Difference]: Finished difference Result 167 states and 394 transitions. [2020-10-15 19:53:38,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 19:53:38,758 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-15 19:53:38,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:38,760 INFO L225 Difference]: With dead ends: 167 [2020-10-15 19:53:38,760 INFO L226 Difference]: Without dead ends: 164 [2020-10-15 19:53:38,760 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2020-10-15 19:53:38,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-15 19:53:38,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 134. [2020-10-15 19:53:38,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-15 19:53:38,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 334 transitions. [2020-10-15 19:53:38,764 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 334 transitions. Word has length 12 [2020-10-15 19:53:38,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:38,764 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 334 transitions. [2020-10-15 19:53:38,764 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:38,764 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 334 transitions. [2020-10-15 19:53:38,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:38,765 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:38,765 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:38,966 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:38,967 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:38,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:38,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1766003003, now seen corresponding path program 20 times [2020-10-15 19:53:38,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:38,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441036983] [2020-10-15 19:53:38,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:38,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:39,033 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:39,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441036983] [2020-10-15 19:53:39,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957028943] [2020-10-15 19:53:39,034 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:39,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:53:39,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:39,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:39,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:39,173 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:53:39,189 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:39,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:39,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:39,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096230234] [2020-10-15 19:53:39,190 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:39,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:39,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:39,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:39,192 INFO L87 Difference]: Start difference. First operand 134 states and 334 transitions. Second operand 15 states. [2020-10-15 19:53:39,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:39,402 INFO L93 Difference]: Finished difference Result 176 states and 418 transitions. [2020-10-15 19:53:39,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 19:53:39,402 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-15 19:53:39,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:39,404 INFO L225 Difference]: With dead ends: 176 [2020-10-15 19:53:39,404 INFO L226 Difference]: Without dead ends: 170 [2020-10-15 19:53:39,405 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2020-10-15 19:53:39,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-15 19:53:39,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 132. [2020-10-15 19:53:39,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-15 19:53:39,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 332 transitions. [2020-10-15 19:53:39,410 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 332 transitions. Word has length 12 [2020-10-15 19:53:39,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:39,410 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 332 transitions. [2020-10-15 19:53:39,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:39,411 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 332 transitions. [2020-10-15 19:53:39,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:39,412 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:39,412 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:39,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:39,624 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:39,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:39,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1530333459, now seen corresponding path program 50 times [2020-10-15 19:53:39,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:39,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182046156] [2020-10-15 19:53:39,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:39,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:39,755 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:39,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182046156] [2020-10-15 19:53:39,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979111983] [2020-10-15 19:53:39,756 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:39,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:53:39,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:39,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:39,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:40,016 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:40,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:40,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:40,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543680456] [2020-10-15 19:53:40,018 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:40,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:40,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:40,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:40,019 INFO L87 Difference]: Start difference. First operand 132 states and 332 transitions. Second operand 15 states. [2020-10-15 19:53:40,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:40,088 INFO L93 Difference]: Finished difference Result 163 states and 394 transitions. [2020-10-15 19:53:40,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 19:53:40,089 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:53:40,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:40,090 INFO L225 Difference]: With dead ends: 163 [2020-10-15 19:53:40,091 INFO L226 Difference]: Without dead ends: 161 [2020-10-15 19:53:40,091 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:40,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-15 19:53:40,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 138. [2020-10-15 19:53:40,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-15 19:53:40,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 350 transitions. [2020-10-15 19:53:40,096 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 350 transitions. Word has length 13 [2020-10-15 19:53:40,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:40,096 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 350 transitions. [2020-10-15 19:53:40,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:40,097 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 350 transitions. [2020-10-15 19:53:40,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:40,098 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:40,098 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:40,312 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2020-10-15 19:53:40,312 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:40,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:40,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1530332498, now seen corresponding path program 51 times [2020-10-15 19:53:40,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:40,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523004591] [2020-10-15 19:53:40,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:40,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:40,394 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:40,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523004591] [2020-10-15 19:53:40,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909953454] [2020-10-15 19:53:40,394 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:40,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 19:53:40,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:40,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:40,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:40,547 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:40,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:40,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:40,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253317761] [2020-10-15 19:53:40,548 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:40,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:40,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:40,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:40,549 INFO L87 Difference]: Start difference. First operand 138 states and 350 transitions. Second operand 15 states. [2020-10-15 19:53:40,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:40,691 INFO L93 Difference]: Finished difference Result 172 states and 412 transitions. [2020-10-15 19:53:40,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 19:53:40,692 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:53:40,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:40,693 INFO L225 Difference]: With dead ends: 172 [2020-10-15 19:53:40,693 INFO L226 Difference]: Without dead ends: 170 [2020-10-15 19:53:40,694 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2020-10-15 19:53:40,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-15 19:53:40,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 136. [2020-10-15 19:53:40,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-15 19:53:40,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 344 transitions. [2020-10-15 19:53:40,697 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 344 transitions. Word has length 13 [2020-10-15 19:53:40,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:40,698 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 344 transitions. [2020-10-15 19:53:40,698 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:40,698 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 344 transitions. [2020-10-15 19:53:40,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:40,698 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:40,698 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:40,907 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:40,907 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:40,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:40,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1530303668, now seen corresponding path program 52 times [2020-10-15 19:53:40,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:40,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244105188] [2020-10-15 19:53:40,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:40,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:40,980 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:40,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244105188] [2020-10-15 19:53:40,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146762114] [2020-10-15 19:53:40,981 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:41,045 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:53:41,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:41,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:41,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:41,219 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:41,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:41,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:41,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376617252] [2020-10-15 19:53:41,220 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:41,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:41,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:41,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:41,221 INFO L87 Difference]: Start difference. First operand 136 states and 344 transitions. Second operand 15 states. [2020-10-15 19:53:41,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:41,408 INFO L93 Difference]: Finished difference Result 179 states and 426 transitions. [2020-10-15 19:53:41,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 19:53:41,408 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:53:41,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:41,410 INFO L225 Difference]: With dead ends: 179 [2020-10-15 19:53:41,410 INFO L226 Difference]: Without dead ends: 177 [2020-10-15 19:53:41,410 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2020-10-15 19:53:41,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-15 19:53:41,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 134. [2020-10-15 19:53:41,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-15 19:53:41,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 338 transitions. [2020-10-15 19:53:41,413 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 338 transitions. Word has length 13 [2020-10-15 19:53:41,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:41,414 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 338 transitions. [2020-10-15 19:53:41,414 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:41,414 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 338 transitions. [2020-10-15 19:53:41,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:41,414 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:41,415 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:41,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2020-10-15 19:53:41,625 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:41,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:41,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1529409938, now seen corresponding path program 53 times [2020-10-15 19:53:41,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:41,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482096559] [2020-10-15 19:53:41,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:41,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:41,703 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:41,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482096559] [2020-10-15 19:53:41,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655892527] [2020-10-15 19:53:41,704 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:41,740 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:53:41,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:41,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:41,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:41,855 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:41,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:41,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:41,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467600249] [2020-10-15 19:53:41,856 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:41,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:41,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:41,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:41,856 INFO L87 Difference]: Start difference. First operand 134 states and 338 transitions. Second operand 15 states. [2020-10-15 19:53:42,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:42,035 INFO L93 Difference]: Finished difference Result 179 states and 426 transitions. [2020-10-15 19:53:42,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 19:53:42,035 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:53:42,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:42,037 INFO L225 Difference]: With dead ends: 179 [2020-10-15 19:53:42,037 INFO L226 Difference]: Without dead ends: 177 [2020-10-15 19:53:42,037 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=279, Unknown=0, NotChecked=0, Total=420 [2020-10-15 19:53:42,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-15 19:53:42,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 136. [2020-10-15 19:53:42,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-15 19:53:42,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 344 transitions. [2020-10-15 19:53:42,041 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 344 transitions. Word has length 13 [2020-10-15 19:53:42,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:42,041 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 344 transitions. [2020-10-15 19:53:42,041 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:42,041 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 344 transitions. [2020-10-15 19:53:42,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:42,042 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:42,042 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:42,251 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-10-15 19:53:42,252 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:42,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:42,252 INFO L82 PathProgramCache]: Analyzing trace with hash -1529408977, now seen corresponding path program 54 times [2020-10-15 19:53:42,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:42,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410680153] [2020-10-15 19:53:42,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:42,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:42,329 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:42,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410680153] [2020-10-15 19:53:42,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463496519] [2020-10-15 19:53:42,330 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:42,365 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 19:53:42,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:42,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:42,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:42,461 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:42,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:42,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:42,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544471555] [2020-10-15 19:53:42,462 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:42,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:42,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:42,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:42,463 INFO L87 Difference]: Start difference. First operand 136 states and 344 transitions. Second operand 15 states. [2020-10-15 19:53:42,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:42,660 INFO L93 Difference]: Finished difference Result 184 states and 436 transitions. [2020-10-15 19:53:42,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 19:53:42,661 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:53:42,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:42,663 INFO L225 Difference]: With dead ends: 184 [2020-10-15 19:53:42,663 INFO L226 Difference]: Without dead ends: 182 [2020-10-15 19:53:42,663 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-10-15 19:53:42,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-15 19:53:42,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 136. [2020-10-15 19:53:42,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-15 19:53:42,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 342 transitions. [2020-10-15 19:53:42,667 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 342 transitions. Word has length 13 [2020-10-15 19:53:42,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:42,667 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 342 transitions. [2020-10-15 19:53:42,667 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:42,667 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 342 transitions. [2020-10-15 19:53:42,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:42,668 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:42,668 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:42,877 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2020-10-15 19:53:42,878 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:42,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:42,878 INFO L82 PathProgramCache]: Analyzing trace with hash -1529380147, now seen corresponding path program 55 times [2020-10-15 19:53:42,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:42,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649352606] [2020-10-15 19:53:42,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:42,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:42,954 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:42,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649352606] [2020-10-15 19:53:42,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644863056] [2020-10-15 19:53:42,954 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:42,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:42,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:42,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:43,115 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:43,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:43,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:43,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357621740] [2020-10-15 19:53:43,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:43,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:43,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:43,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:43,117 INFO L87 Difference]: Start difference. First operand 136 states and 342 transitions. Second operand 15 states. [2020-10-15 19:53:43,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:43,328 INFO L93 Difference]: Finished difference Result 179 states and 427 transitions. [2020-10-15 19:53:43,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 19:53:43,328 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:53:43,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:43,330 INFO L225 Difference]: With dead ends: 179 [2020-10-15 19:53:43,330 INFO L226 Difference]: Without dead ends: 177 [2020-10-15 19:53:43,330 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-10-15 19:53:43,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-15 19:53:43,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 135. [2020-10-15 19:53:43,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-15 19:53:43,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 339 transitions. [2020-10-15 19:53:43,333 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 339 transitions. Word has length 13 [2020-10-15 19:53:43,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:43,334 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 339 transitions. [2020-10-15 19:53:43,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:43,334 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 339 transitions. [2020-10-15 19:53:43,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:43,334 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:43,334 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:43,534 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:43,535 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:43,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:43,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1501704308, now seen corresponding path program 56 times [2020-10-15 19:53:43,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:43,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358485644] [2020-10-15 19:53:43,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:43,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:43,616 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:43,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358485644] [2020-10-15 19:53:43,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16690686] [2020-10-15 19:53:43,617 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:43,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:53:43,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:43,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:43,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:43,761 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:43,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:43,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:43,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782463003] [2020-10-15 19:53:43,762 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:43,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:43,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:43,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:43,763 INFO L87 Difference]: Start difference. First operand 135 states and 339 transitions. Second operand 15 states. [2020-10-15 19:53:43,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:43,917 INFO L93 Difference]: Finished difference Result 176 states and 421 transitions. [2020-10-15 19:53:43,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 19:53:43,917 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:53:43,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:43,919 INFO L225 Difference]: With dead ends: 176 [2020-10-15 19:53:43,919 INFO L226 Difference]: Without dead ends: 174 [2020-10-15 19:53:43,919 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-10-15 19:53:43,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-15 19:53:43,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 139. [2020-10-15 19:53:43,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-15 19:53:43,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 350 transitions. [2020-10-15 19:53:43,923 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 350 transitions. Word has length 13 [2020-10-15 19:53:43,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:43,923 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 350 transitions. [2020-10-15 19:53:43,923 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:43,923 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 350 transitions. [2020-10-15 19:53:43,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:43,924 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:43,924 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:44,124 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:44,125 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:44,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:44,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1501703347, now seen corresponding path program 57 times [2020-10-15 19:53:44,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:44,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322117385] [2020-10-15 19:53:44,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:44,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:44,204 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:44,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322117385] [2020-10-15 19:53:44,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216282817] [2020-10-15 19:53:44,205 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:44,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 19:53:44,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:44,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:44,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:44,371 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:44,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:44,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:44,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991467161] [2020-10-15 19:53:44,372 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:44,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:44,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:44,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:44,373 INFO L87 Difference]: Start difference. First operand 139 states and 350 transitions. Second operand 15 states. [2020-10-15 19:53:44,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:44,573 INFO L93 Difference]: Finished difference Result 185 states and 439 transitions. [2020-10-15 19:53:44,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 19:53:44,574 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:53:44,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:44,575 INFO L225 Difference]: With dead ends: 185 [2020-10-15 19:53:44,575 INFO L226 Difference]: Without dead ends: 183 [2020-10-15 19:53:44,576 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-10-15 19:53:44,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-15 19:53:44,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 140. [2020-10-15 19:53:44,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-15 19:53:44,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 352 transitions. [2020-10-15 19:53:44,579 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 352 transitions. Word has length 13 [2020-10-15 19:53:44,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:44,579 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 352 transitions. [2020-10-15 19:53:44,579 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:44,579 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 352 transitions. [2020-10-15 19:53:44,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:44,580 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:44,580 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:44,781 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:44,781 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:44,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:44,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1501674517, now seen corresponding path program 58 times [2020-10-15 19:53:44,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:44,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488501711] [2020-10-15 19:53:44,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:44,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:44,865 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:44,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488501711] [2020-10-15 19:53:44,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703010523] [2020-10-15 19:53:44,866 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:44,902 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:53:44,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:44,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:44,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:45,009 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:45,009 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:45,009 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:45,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968780200] [2020-10-15 19:53:45,009 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:45,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:45,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:45,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:45,010 INFO L87 Difference]: Start difference. First operand 140 states and 352 transitions. Second operand 15 states. [2020-10-15 19:53:45,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:45,209 INFO L93 Difference]: Finished difference Result 185 states and 439 transitions. [2020-10-15 19:53:45,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 19:53:45,210 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:53:45,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:45,211 INFO L225 Difference]: With dead ends: 185 [2020-10-15 19:53:45,211 INFO L226 Difference]: Without dead ends: 183 [2020-10-15 19:53:45,211 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-10-15 19:53:45,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-15 19:53:45,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 138. [2020-10-15 19:53:45,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-15 19:53:45,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 345 transitions. [2020-10-15 19:53:45,215 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 345 transitions. Word has length 13 [2020-10-15 19:53:45,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:45,215 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 345 transitions. [2020-10-15 19:53:45,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:45,215 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 345 transitions. [2020-10-15 19:53:45,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:45,216 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:45,216 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:45,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:45,417 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:45,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:45,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1043911547, now seen corresponding path program 59 times [2020-10-15 19:53:45,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:45,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615330276] [2020-10-15 19:53:45,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:45,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:45,562 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:45,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615330276] [2020-10-15 19:53:45,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277750242] [2020-10-15 19:53:45,563 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:45,600 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 19:53:45,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:45,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:45,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:45,706 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:45,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:45,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:45,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158412152] [2020-10-15 19:53:45,707 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:45,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:45,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:45,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:45,707 INFO L87 Difference]: Start difference. First operand 138 states and 345 transitions. Second operand 15 states. [2020-10-15 19:53:45,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:45,786 INFO L93 Difference]: Finished difference Result 182 states and 432 transitions. [2020-10-15 19:53:45,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 19:53:45,787 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:53:45,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:45,788 INFO L225 Difference]: With dead ends: 182 [2020-10-15 19:53:45,788 INFO L226 Difference]: Without dead ends: 180 [2020-10-15 19:53:45,788 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2020-10-15 19:53:45,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-15 19:53:45,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 144. [2020-10-15 19:53:45,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-15 19:53:45,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 363 transitions. [2020-10-15 19:53:45,792 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 363 transitions. Word has length 13 [2020-10-15 19:53:45,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:45,794 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 363 transitions. [2020-10-15 19:53:45,794 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:45,795 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 363 transitions. [2020-10-15 19:53:45,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:45,795 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:45,795 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:46,005 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2020-10-15 19:53:46,005 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:46,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:46,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1043912508, now seen corresponding path program 60 times [2020-10-15 19:53:46,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:46,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828296956] [2020-10-15 19:53:46,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:46,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:46,105 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:46,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828296956] [2020-10-15 19:53:46,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360080495] [2020-10-15 19:53:46,105 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:46,150 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 19:53:46,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:46,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:46,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:46,262 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:46,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:46,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:46,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636668023] [2020-10-15 19:53:46,264 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:46,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:46,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:46,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:46,265 INFO L87 Difference]: Start difference. First operand 144 states and 363 transitions. Second operand 15 states. [2020-10-15 19:53:46,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:46,434 INFO L93 Difference]: Finished difference Result 185 states and 437 transitions. [2020-10-15 19:53:46,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 19:53:46,434 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:53:46,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:46,436 INFO L225 Difference]: With dead ends: 185 [2020-10-15 19:53:46,436 INFO L226 Difference]: Without dead ends: 183 [2020-10-15 19:53:46,436 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2020-10-15 19:53:46,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-15 19:53:46,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 142. [2020-10-15 19:53:46,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-15 19:53:46,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 357 transitions. [2020-10-15 19:53:46,440 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 357 transitions. Word has length 13 [2020-10-15 19:53:46,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:46,440 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 357 transitions. [2020-10-15 19:53:46,440 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:46,440 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 357 transitions. [2020-10-15 19:53:46,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:46,441 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:46,441 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:46,650 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:46,651 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:46,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:46,651 INFO L82 PathProgramCache]: Analyzing trace with hash 1043941338, now seen corresponding path program 61 times [2020-10-15 19:53:46,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:46,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373106242] [2020-10-15 19:53:46,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:46,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:46,735 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:46,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373106242] [2020-10-15 19:53:46,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251713582] [2020-10-15 19:53:46,735 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:46,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:46,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:46,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:47,383 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:47,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:47,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:47,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567848881] [2020-10-15 19:53:47,384 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:47,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:47,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:47,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:47,384 INFO L87 Difference]: Start difference. First operand 142 states and 357 transitions. Second operand 15 states. [2020-10-15 19:53:47,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:47,609 INFO L93 Difference]: Finished difference Result 191 states and 449 transitions. [2020-10-15 19:53:47,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 19:53:47,610 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:53:47,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:47,611 INFO L225 Difference]: With dead ends: 191 [2020-10-15 19:53:47,611 INFO L226 Difference]: Without dead ends: 189 [2020-10-15 19:53:47,612 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2020-10-15 19:53:47,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-10-15 19:53:47,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 140. [2020-10-15 19:53:47,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-15 19:53:47,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 351 transitions. [2020-10-15 19:53:47,615 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 351 transitions. Word has length 13 [2020-10-15 19:53:47,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:47,615 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 351 transitions. [2020-10-15 19:53:47,615 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:47,615 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 351 transitions. [2020-10-15 19:53:47,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:47,616 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:47,616 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:47,822 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:47,823 INFO L429 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:47,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:47,824 INFO L82 PathProgramCache]: Analyzing trace with hash 1044835068, now seen corresponding path program 62 times [2020-10-15 19:53:47,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:47,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922634226] [2020-10-15 19:53:47,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:47,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:47,896 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:47,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922634226] [2020-10-15 19:53:47,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611383237] [2020-10-15 19:53:47,897 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:47,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:53:47,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:47,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:47,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:48,090 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:48,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:48,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:48,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266542329] [2020-10-15 19:53:48,091 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:48,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:48,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:48,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:48,092 INFO L87 Difference]: Start difference. First operand 140 states and 351 transitions. Second operand 15 states. [2020-10-15 19:53:48,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:48,309 INFO L93 Difference]: Finished difference Result 187 states and 441 transitions. [2020-10-15 19:53:48,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 19:53:48,309 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:53:48,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:48,311 INFO L225 Difference]: With dead ends: 187 [2020-10-15 19:53:48,311 INFO L226 Difference]: Without dead ends: 185 [2020-10-15 19:53:48,312 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=158, Invalid=348, Unknown=0, NotChecked=0, Total=506 [2020-10-15 19:53:48,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-15 19:53:48,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 142. [2020-10-15 19:53:48,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-15 19:53:48,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 357 transitions. [2020-10-15 19:53:48,315 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 357 transitions. Word has length 13 [2020-10-15 19:53:48,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:48,315 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 357 transitions. [2020-10-15 19:53:48,316 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:48,316 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 357 transitions. [2020-10-15 19:53:48,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:48,316 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:48,316 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:48,519 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2020-10-15 19:53:48,520 INFO L429 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:48,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:48,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1044836029, now seen corresponding path program 63 times [2020-10-15 19:53:48,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:48,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594909492] [2020-10-15 19:53:48,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:48,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:48,601 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:48,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594909492] [2020-10-15 19:53:48,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536018051] [2020-10-15 19:53:48,601 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:48,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 19:53:48,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:48,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:48,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:48,748 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:48,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:48,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:48,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678135836] [2020-10-15 19:53:48,750 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:48,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:48,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:48,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:48,750 INFO L87 Difference]: Start difference. First operand 142 states and 357 transitions. Second operand 15 states. [2020-10-15 19:53:48,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:48,996 INFO L93 Difference]: Finished difference Result 198 states and 463 transitions. [2020-10-15 19:53:48,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 19:53:48,996 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:53:48,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:48,998 INFO L225 Difference]: With dead ends: 198 [2020-10-15 19:53:48,998 INFO L226 Difference]: Without dead ends: 196 [2020-10-15 19:53:48,999 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2020-10-15 19:53:48,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-15 19:53:49,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 142. [2020-10-15 19:53:49,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-15 19:53:49,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 356 transitions. [2020-10-15 19:53:49,002 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 356 transitions. Word has length 13 [2020-10-15 19:53:49,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:49,002 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 356 transitions. [2020-10-15 19:53:49,002 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:49,002 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 356 transitions. [2020-10-15 19:53:49,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:49,002 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:49,002 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:49,203 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:49,203 INFO L429 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:49,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:49,204 INFO L82 PathProgramCache]: Analyzing trace with hash 1044864859, now seen corresponding path program 64 times [2020-10-15 19:53:49,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:49,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912035394] [2020-10-15 19:53:49,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:49,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:49,293 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:49,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912035394] [2020-10-15 19:53:49,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084198998] [2020-10-15 19:53:49,294 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:49,344 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:53:49,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:49,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:49,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:49,459 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:49,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:49,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:49,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467253252] [2020-10-15 19:53:49,460 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:49,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:49,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:49,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:49,461 INFO L87 Difference]: Start difference. First operand 142 states and 356 transitions. Second operand 15 states. [2020-10-15 19:53:49,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:49,738 INFO L93 Difference]: Finished difference Result 189 states and 446 transitions. [2020-10-15 19:53:49,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 19:53:49,738 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:53:49,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:49,740 INFO L225 Difference]: With dead ends: 189 [2020-10-15 19:53:49,740 INFO L226 Difference]: Without dead ends: 187 [2020-10-15 19:53:49,740 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2020-10-15 19:53:49,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-10-15 19:53:49,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 139. [2020-10-15 19:53:49,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-15 19:53:49,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 347 transitions. [2020-10-15 19:53:49,743 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 347 transitions. Word has length 13 [2020-10-15 19:53:49,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:49,743 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 347 transitions. [2020-10-15 19:53:49,743 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:49,743 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 347 transitions. [2020-10-15 19:53:49,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:49,744 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:49,744 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:49,946 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2020-10-15 19:53:49,946 INFO L429 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:49,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:49,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1681141037, now seen corresponding path program 65 times [2020-10-15 19:53:49,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:49,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309748710] [2020-10-15 19:53:49,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:49,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:50,056 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:50,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309748710] [2020-10-15 19:53:50,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499037337] [2020-10-15 19:53:50,057 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:50,103 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 19:53:50,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:50,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:50,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:50,218 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:50,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:50,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:50,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500589734] [2020-10-15 19:53:50,219 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:50,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:50,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:50,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:50,220 INFO L87 Difference]: Start difference. First operand 139 states and 347 transitions. Second operand 15 states. [2020-10-15 19:53:50,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:50,311 INFO L93 Difference]: Finished difference Result 178 states and 423 transitions. [2020-10-15 19:53:50,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 19:53:50,312 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:53:50,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:50,313 INFO L225 Difference]: With dead ends: 178 [2020-10-15 19:53:50,313 INFO L226 Difference]: Without dead ends: 176 [2020-10-15 19:53:50,314 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:53:50,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-10-15 19:53:50,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 143. [2020-10-15 19:53:50,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-15 19:53:50,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 359 transitions. [2020-10-15 19:53:50,317 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 359 transitions. Word has length 13 [2020-10-15 19:53:50,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:50,317 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 359 transitions. [2020-10-15 19:53:50,317 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:50,317 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 359 transitions. [2020-10-15 19:53:50,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:50,318 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:50,318 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:50,524 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:50,524 INFO L429 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:50,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:50,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1681141998, now seen corresponding path program 66 times [2020-10-15 19:53:50,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:50,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993258748] [2020-10-15 19:53:50,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:50,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:50,619 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:50,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993258748] [2020-10-15 19:53:50,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556067083] [2020-10-15 19:53:50,620 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:50,657 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 19:53:50,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:50,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:50,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:50,778 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:50,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:50,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:50,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875839090] [2020-10-15 19:53:50,779 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:50,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:50,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:50,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:50,780 INFO L87 Difference]: Start difference. First operand 143 states and 359 transitions. Second operand 15 states. [2020-10-15 19:53:50,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:50,968 INFO L93 Difference]: Finished difference Result 193 states and 452 transitions. [2020-10-15 19:53:50,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 19:53:50,969 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:53:50,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:50,970 INFO L225 Difference]: With dead ends: 193 [2020-10-15 19:53:50,970 INFO L226 Difference]: Without dead ends: 191 [2020-10-15 19:53:50,971 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2020-10-15 19:53:50,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-10-15 19:53:50,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 141. [2020-10-15 19:53:50,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-15 19:53:50,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 353 transitions. [2020-10-15 19:53:50,973 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 353 transitions. Word has length 13 [2020-10-15 19:53:50,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:50,974 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 353 transitions. [2020-10-15 19:53:50,974 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:50,974 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 353 transitions. [2020-10-15 19:53:50,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:50,974 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:50,974 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:51,175 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable91 [2020-10-15 19:53:51,175 INFO L429 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:51,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:51,176 INFO L82 PathProgramCache]: Analyzing trace with hash 1681170828, now seen corresponding path program 67 times [2020-10-15 19:53:51,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:51,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373226919] [2020-10-15 19:53:51,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:51,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:51,254 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:51,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373226919] [2020-10-15 19:53:51,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294883328] [2020-10-15 19:53:51,255 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 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:51,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:51,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:51,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:51,512 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:51,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:51,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:51,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712902847] [2020-10-15 19:53:51,513 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:51,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:51,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:51,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:51,513 INFO L87 Difference]: Start difference. First operand 141 states and 353 transitions. Second operand 15 states. [2020-10-15 19:53:51,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:51,757 INFO L93 Difference]: Finished difference Result 195 states and 456 transitions. [2020-10-15 19:53:51,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 19:53:51,758 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:53:51,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:51,759 INFO L225 Difference]: With dead ends: 195 [2020-10-15 19:53:51,759 INFO L226 Difference]: Without dead ends: 193 [2020-10-15 19:53:51,760 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=146, Invalid=316, Unknown=0, NotChecked=0, Total=462 [2020-10-15 19:53:51,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-15 19:53:51,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 140. [2020-10-15 19:53:51,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-15 19:53:51,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 349 transitions. [2020-10-15 19:53:51,763 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 349 transitions. Word has length 13 [2020-10-15 19:53:51,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:51,763 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 349 transitions. [2020-10-15 19:53:51,763 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:51,763 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 349 transitions. [2020-10-15 19:53:51,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:51,763 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:51,763 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:51,964 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:51,964 INFO L429 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:51,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:51,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1701696827, now seen corresponding path program 68 times [2020-10-15 19:53:51,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:51,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586502674] [2020-10-15 19:53:51,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:51,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:52,062 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:52,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586502674] [2020-10-15 19:53:52,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945519746] [2020-10-15 19:53:52,063 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:52,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:53:52,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:52,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:52,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:52,204 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:52,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:52,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:52,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865329086] [2020-10-15 19:53:52,205 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:52,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:52,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:52,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:52,206 INFO L87 Difference]: Start difference. First operand 140 states and 349 transitions. Second operand 15 states. [2020-10-15 19:53:52,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:52,310 INFO L93 Difference]: Finished difference Result 174 states and 414 transitions. [2020-10-15 19:53:52,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 19:53:52,311 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:53:52,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:52,313 INFO L225 Difference]: With dead ends: 174 [2020-10-15 19:53:52,313 INFO L226 Difference]: Without dead ends: 172 [2020-10-15 19:53:52,313 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2020-10-15 19:53:52,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-15 19:53:52,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 142. [2020-10-15 19:53:52,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-15 19:53:52,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 355 transitions. [2020-10-15 19:53:52,316 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 355 transitions. Word has length 13 [2020-10-15 19:53:52,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:52,316 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 355 transitions. [2020-10-15 19:53:52,316 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:52,316 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 355 transitions. [2020-10-15 19:53:52,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:52,317 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:52,317 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:52,517 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2020-10-15 19:53:52,518 INFO L429 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:52,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:52,518 INFO L82 PathProgramCache]: Analyzing trace with hash 1701697788, now seen corresponding path program 69 times [2020-10-15 19:53:52,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:52,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967251725] [2020-10-15 19:53:52,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:52,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:52,598 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:52,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967251725] [2020-10-15 19:53:52,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309310643] [2020-10-15 19:53:52,599 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:52,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 19:53:52,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:52,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:52,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:52,754 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:52,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:52,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:52,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91710168] [2020-10-15 19:53:52,755 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:52,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:52,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:52,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:52,756 INFO L87 Difference]: Start difference. First operand 142 states and 355 transitions. Second operand 15 states. [2020-10-15 19:53:53,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:53,001 INFO L93 Difference]: Finished difference Result 189 states and 443 transitions. [2020-10-15 19:53:53,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 19:53:53,002 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:53:53,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:53,004 INFO L225 Difference]: With dead ends: 189 [2020-10-15 19:53:53,004 INFO L226 Difference]: Without dead ends: 187 [2020-10-15 19:53:53,005 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2020-10-15 19:53:53,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-10-15 19:53:53,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 141. [2020-10-15 19:53:53,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-15 19:53:53,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 351 transitions. [2020-10-15 19:53:53,008 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 351 transitions. Word has length 13 [2020-10-15 19:53:53,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:53,008 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 351 transitions. [2020-10-15 19:53:53,008 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:53,008 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 351 transitions. [2020-10-15 19:53:53,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:53,009 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:53,009 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:53,212 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:53,213 INFO L429 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:53,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:53,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1702359917, now seen corresponding path program 70 times [2020-10-15 19:53:53,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:53,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457504206] [2020-10-15 19:53:53,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:53,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:53,286 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:53,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457504206] [2020-10-15 19:53:53,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184498227] [2020-10-15 19:53:53,287 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:53,327 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:53:53,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:53,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:53,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:53,446 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:53,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:53,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:53,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760905659] [2020-10-15 19:53:53,447 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:53,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:53,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:53,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:53,448 INFO L87 Difference]: Start difference. First operand 141 states and 351 transitions. Second operand 15 states. [2020-10-15 19:53:53,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:53,583 INFO L93 Difference]: Finished difference Result 175 states and 413 transitions. [2020-10-15 19:53:53,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 19:53:53,583 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:53:53,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:53,585 INFO L225 Difference]: With dead ends: 175 [2020-10-15 19:53:53,585 INFO L226 Difference]: Without dead ends: 173 [2020-10-15 19:53:53,585 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2020-10-15 19:53:53,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-10-15 19:53:53,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 145. [2020-10-15 19:53:53,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-15 19:53:53,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-10-15 19:53:53,588 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-10-15 19:53:53,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:53,588 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-10-15 19:53:53,588 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:53,588 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-10-15 19:53:53,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:53,589 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:53,589 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:53,789 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:53,789 INFO L429 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:53,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:53,790 INFO L82 PathProgramCache]: Analyzing trace with hash 1702382237, now seen corresponding path program 71 times [2020-10-15 19:53:53,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:53,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738586589] [2020-10-15 19:53:53,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:53,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:53,857 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:53,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738586589] [2020-10-15 19:53:53,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423946751] [2020-10-15 19:53:53,858 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:53,903 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 19:53:53,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:53,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:53,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:54,018 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:53:54,051 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:54,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:54,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:54,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464624023] [2020-10-15 19:53:54,052 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:54,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:54,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:54,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:54,053 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-10-15 19:53:54,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:54,388 INFO L93 Difference]: Finished difference Result 195 states and 464 transitions. [2020-10-15 19:53:54,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 19:53:54,389 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:53:54,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:54,391 INFO L225 Difference]: With dead ends: 195 [2020-10-15 19:53:54,391 INFO L226 Difference]: Without dead ends: 190 [2020-10-15 19:53:54,391 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2020-10-15 19:53:54,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-10-15 19:53:54,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 143. [2020-10-15 19:53:54,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-15 19:53:54,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 350 transitions. [2020-10-15 19:53:54,396 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 350 transitions. Word has length 13 [2020-10-15 19:53:54,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:54,396 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 350 transitions. [2020-10-15 19:53:54,396 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:54,396 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 350 transitions. [2020-10-15 19:53:54,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:54,397 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:54,397 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:54,607 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:54,608 INFO L429 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:54,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:54,608 INFO L82 PathProgramCache]: Analyzing trace with hash 1702389708, now seen corresponding path program 72 times [2020-10-15 19:53:54,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:54,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654365959] [2020-10-15 19:53:54,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:54,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:54,679 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:54,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654365959] [2020-10-15 19:53:54,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254955297] [2020-10-15 19:53:54,680 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:54,716 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 19:53:54,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:54,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:54,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:54,847 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:54,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:54,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:54,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557864665] [2020-10-15 19:53:54,848 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:54,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:54,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:54,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:54,849 INFO L87 Difference]: Start difference. First operand 143 states and 350 transitions. Second operand 15 states. [2020-10-15 19:53:55,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:55,106 INFO L93 Difference]: Finished difference Result 187 states and 442 transitions. [2020-10-15 19:53:55,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 19:53:55,107 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:53:55,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:55,108 INFO L225 Difference]: With dead ends: 187 [2020-10-15 19:53:55,108 INFO L226 Difference]: Without dead ends: 185 [2020-10-15 19:53:55,109 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-10-15 19:53:55,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-15 19:53:55,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 145. [2020-10-15 19:53:55,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-15 19:53:55,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-10-15 19:53:55,112 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-10-15 19:53:55,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:55,112 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-10-15 19:53:55,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:55,112 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-10-15 19:53:55,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:55,112 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:55,112 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:55,313 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:55,313 INFO L429 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:55,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:55,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1702411067, now seen corresponding path program 73 times [2020-10-15 19:53:55,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:55,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593516652] [2020-10-15 19:53:55,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:55,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:55,386 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:55,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593516652] [2020-10-15 19:53:55,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54790023] [2020-10-15 19:53:55,386 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:55,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:55,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:55,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:55,549 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:53:55,577 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:55,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:55,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:55,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812794668] [2020-10-15 19:53:55,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:55,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:55,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:55,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:55,578 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-10-15 19:53:56,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:56,026 INFO L93 Difference]: Finished difference Result 212 states and 503 transitions. [2020-10-15 19:53:56,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 19:53:56,027 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:53:56,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:56,028 INFO L225 Difference]: With dead ends: 212 [2020-10-15 19:53:56,028 INFO L226 Difference]: Without dead ends: 207 [2020-10-15 19:53:56,029 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=250, Invalid=506, Unknown=0, NotChecked=0, Total=756 [2020-10-15 19:53:56,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-15 19:53:56,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 145. [2020-10-15 19:53:56,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-15 19:53:56,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-10-15 19:53:56,032 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-10-15 19:53:56,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:56,033 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-10-15 19:53:56,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:56,033 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-10-15 19:53:56,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:56,033 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:56,033 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:56,234 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2020-10-15 19:53:56,234 INFO L429 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:56,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:56,235 INFO L82 PathProgramCache]: Analyzing trace with hash 1702412028, now seen corresponding path program 74 times [2020-10-15 19:53:56,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:56,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180555869] [2020-10-15 19:53:56,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:56,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:56,308 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:56,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180555869] [2020-10-15 19:53:56,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664636118] [2020-10-15 19:53:56,309 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:56,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:53:56,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:56,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:56,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:56,462 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:53:56,483 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:56,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:56,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:56,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674439264] [2020-10-15 19:53:56,484 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:56,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:56,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:56,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:56,485 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-10-15 19:53:56,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:56,812 INFO L93 Difference]: Finished difference Result 202 states and 480 transitions. [2020-10-15 19:53:56,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 19:53:56,813 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:53:56,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:56,815 INFO L225 Difference]: With dead ends: 202 [2020-10-15 19:53:56,815 INFO L226 Difference]: Without dead ends: 197 [2020-10-15 19:53:56,815 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2020-10-15 19:53:56,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-10-15 19:53:56,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 141. [2020-10-15 19:53:56,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-15 19:53:56,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 343 transitions. [2020-10-15 19:53:56,818 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 343 transitions. Word has length 13 [2020-10-15 19:53:56,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:56,818 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 343 transitions. [2020-10-15 19:53:56,818 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:56,818 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 343 transitions. [2020-10-15 19:53:56,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:56,819 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:56,819 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:57,019 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:57,020 INFO L429 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:57,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:57,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1702620348, now seen corresponding path program 75 times [2020-10-15 19:53:57,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:57,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001585664] [2020-10-15 19:53:57,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:57,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:57,092 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:57,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001585664] [2020-10-15 19:53:57,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049688022] [2020-10-15 19:53:57,092 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:57,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 19:53:57,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:57,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:57,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:57,772 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:57,772 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:57,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:57,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269672443] [2020-10-15 19:53:57,773 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:57,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:57,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:57,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:57,773 INFO L87 Difference]: Start difference. First operand 141 states and 343 transitions. Second operand 15 states. [2020-10-15 19:53:58,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:58,064 INFO L93 Difference]: Finished difference Result 198 states and 460 transitions. [2020-10-15 19:53:58,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 19:53:58,065 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:53:58,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:58,066 INFO L225 Difference]: With dead ends: 198 [2020-10-15 19:53:58,066 INFO L226 Difference]: Without dead ends: 196 [2020-10-15 19:53:58,066 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=148, Invalid=358, Unknown=0, NotChecked=0, Total=506 [2020-10-15 19:53:58,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-15 19:53:58,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 143. [2020-10-15 19:53:58,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-15 19:53:58,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 350 transitions. [2020-10-15 19:53:58,071 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 350 transitions. Word has length 13 [2020-10-15 19:53:58,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:58,071 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 350 transitions. [2020-10-15 19:53:58,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:58,071 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 350 transitions. [2020-10-15 19:53:58,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:58,072 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:58,072 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:58,273 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2020-10-15 19:53:58,274 INFO L429 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:58,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:58,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1703283438, now seen corresponding path program 76 times [2020-10-15 19:53:58,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:58,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589007388] [2020-10-15 19:53:58,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:58,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:58,341 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:58,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589007388] [2020-10-15 19:53:58,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144603054] [2020-10-15 19:53:58,341 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:58,379 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:53:58,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:58,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:58,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:58,551 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:58,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:58,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:58,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166238955] [2020-10-15 19:53:58,551 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:58,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:58,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:58,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:58,552 INFO L87 Difference]: Start difference. First operand 143 states and 350 transitions. Second operand 15 states. [2020-10-15 19:53:58,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:58,962 INFO L93 Difference]: Finished difference Result 209 states and 491 transitions. [2020-10-15 19:53:58,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 19:53:58,963 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:53:58,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:58,964 INFO L225 Difference]: With dead ends: 209 [2020-10-15 19:53:58,964 INFO L226 Difference]: Without dead ends: 207 [2020-10-15 19:53:58,964 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=206, Invalid=444, Unknown=0, NotChecked=0, Total=650 [2020-10-15 19:53:58,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-15 19:53:58,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 145. [2020-10-15 19:53:58,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-15 19:53:58,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-10-15 19:53:58,968 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-10-15 19:53:58,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:58,968 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-10-15 19:53:58,968 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:58,968 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-10-15 19:53:58,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:58,969 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:58,969 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:59,169 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2020-10-15 19:53:59,169 INFO L429 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:59,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:59,170 INFO L82 PathProgramCache]: Analyzing trace with hash 1703304797, now seen corresponding path program 77 times [2020-10-15 19:53:59,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:59,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969167095] [2020-10-15 19:53:59,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:59,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:59,241 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:59,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969167095] [2020-10-15 19:53:59,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320994257] [2020-10-15 19:53:59,241 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:59,280 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 19:53:59,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:59,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:59,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:59,402 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:53:59,437 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:59,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:59,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:59,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936221377] [2020-10-15 19:53:59,439 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:59,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:59,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:59,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:59,439 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-10-15 19:54:00,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:54:00,004 INFO L93 Difference]: Finished difference Result 217 states and 518 transitions. [2020-10-15 19:54:00,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 19:54:00,005 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:54:00,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:54:00,006 INFO L225 Difference]: With dead ends: 217 [2020-10-15 19:54:00,006 INFO L226 Difference]: Without dead ends: 212 [2020-10-15 19:54:00,007 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=289, Invalid=581, Unknown=0, NotChecked=0, Total=870 [2020-10-15 19:54:00,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-10-15 19:54:00,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 146. [2020-10-15 19:54:00,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-15 19:54:00,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 362 transitions. [2020-10-15 19:54:00,011 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 362 transitions. Word has length 13 [2020-10-15 19:54:00,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:54:00,011 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 362 transitions. [2020-10-15 19:54:00,011 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:54:00,011 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 362 transitions. [2020-10-15 19:54:00,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:54:00,012 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:54:00,012 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:54:00,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2020-10-15 19:54:00,219 INFO L429 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:54:00,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:54:00,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1703305758, now seen corresponding path program 78 times [2020-10-15 19:54:00,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:54:00,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058511145] [2020-10-15 19:54:00,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:54:00,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:54:00,296 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:54:00,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058511145] [2020-10-15 19:54:00,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64699324] [2020-10-15 19:54:00,297 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:54:00,335 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 19:54:00,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:54:00,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:54:00,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:54:02,516 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:54:02,550 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:54:02,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:54:02,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:54:02,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024650203] [2020-10-15 19:54:02,551 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:54:02,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:54:02,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:54:02,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=142, Unknown=1, NotChecked=0, Total=210 [2020-10-15 19:54:02,552 INFO L87 Difference]: Start difference. First operand 146 states and 362 transitions. Second operand 15 states. [2020-10-15 19:54:06,859 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-10-15 19:54:11,086 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-10-15 19:54:11,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:54:11,527 INFO L93 Difference]: Finished difference Result 236 states and 562 transitions. [2020-10-15 19:54:11,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 19:54:11,527 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:54:11,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:54:11,529 INFO L225 Difference]: With dead ends: 236 [2020-10-15 19:54:11,529 INFO L226 Difference]: Without dead ends: 228 [2020-10-15 19:54:11,529 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=293, Invalid=636, Unknown=1, NotChecked=0, Total=930 [2020-10-15 19:54:11,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-10-15 19:54:11,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 141. [2020-10-15 19:54:11,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-15 19:54:11,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 346 transitions. [2020-10-15 19:54:11,532 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 346 transitions. Word has length 13 [2020-10-15 19:54:11,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:54:11,532 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 346 transitions. [2020-10-15 19:54:11,532 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:54:11,532 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 346 transitions. [2020-10-15 19:54:11,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:54:11,533 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:54:11,533 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:54:11,733 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2020-10-15 19:54:11,734 INFO L429 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:54:11,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:54:11,734 INFO L82 PathProgramCache]: Analyzing trace with hash 1703334588, now seen corresponding path program 79 times [2020-10-15 19:54:11,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:54:11,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240870546] [2020-10-15 19:54:11,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:54:11,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:54:11,807 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:54:11,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240870546] [2020-10-15 19:54:11,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23134827] [2020-10-15 19:54:11,808 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:54:11,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:54:11,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:54:11,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:54:12,001 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:54:12,003 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:54:13,215 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:54:13,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:54:13,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-10-15 19:54:13,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075386643] [2020-10-15 19:54:13,216 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 19:54:13,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:54:13,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 19:54:13,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=169, Unknown=1, NotChecked=0, Total=240 [2020-10-15 19:54:13,216 INFO L87 Difference]: Start difference. First operand 141 states and 346 transitions. Second operand 16 states. [2020-10-15 19:54:15,713 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 44 [2020-10-15 19:54:23,189 WARN L193 SmtUtils]: Spent 1.22 s on a formula simplification that was a NOOP. DAG size: 51 [2020-10-15 19:54:26,261 WARN L193 SmtUtils]: Spent 2.99 s on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2020-10-15 19:55:03,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:55:03,427 INFO L93 Difference]: Finished difference Result 236 states and 556 transitions. [2020-10-15 19:55:03,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 19:55:03,427 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-10-15 19:55:03,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:55:03,429 INFO L225 Difference]: With dead ends: 236 [2020-10-15 19:55:03,429 INFO L226 Difference]: Without dead ends: 231 [2020-10-15 19:55:03,430 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 25.0s TimeCoverageRelationStatistics Valid=311, Invalid=734, Unknown=11, NotChecked=0, Total=1056 [2020-10-15 19:55:03,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-10-15 19:55:03,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 140. [2020-10-15 19:55:03,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-15 19:55:03,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 341 transitions. [2020-10-15 19:55:03,433 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 341 transitions. Word has length 13 [2020-10-15 19:55:03,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:55:03,434 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 341 transitions. [2020-10-15 19:55:03,434 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 19:55:03,434 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 341 transitions. [2020-10-15 19:55:03,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:55:03,434 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:55:03,434 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:55:03,644 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:55:03,645 INFO L429 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:55:03,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:55:03,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1709770188, now seen corresponding path program 80 times [2020-10-15 19:55:03,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:55:03,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806646529] [2020-10-15 19:55:03,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:55:03,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:55:03,725 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:03,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806646529] [2020-10-15 19:55:03,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583345549] [2020-10-15 19:55:03,726 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:55:03,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:55:03,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:55:03,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:55:03,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:55:03,908 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:03,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:55:03,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:55:03,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154144141] [2020-10-15 19:55:03,910 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:55:03,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:55:03,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:55:03,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:55:03,910 INFO L87 Difference]: Start difference. First operand 140 states and 341 transitions. Second operand 15 states. [2020-10-15 19:55:04,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:55:04,193 INFO L93 Difference]: Finished difference Result 197 states and 457 transitions. [2020-10-15 19:55:04,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 19:55:04,194 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:55:04,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:55:04,195 INFO L225 Difference]: With dead ends: 197 [2020-10-15 19:55:04,195 INFO L226 Difference]: Without dead ends: 195 [2020-10-15 19:55:04,195 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2020-10-15 19:55:04,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-10-15 19:55:04,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 143. [2020-10-15 19:55:04,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-15 19:55:04,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 352 transitions. [2020-10-15 19:55:04,199 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 352 transitions. Word has length 13 [2020-10-15 19:55:04,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:55:04,200 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 352 transitions. [2020-10-15 19:55:04,200 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:55:04,200 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 352 transitions. [2020-10-15 19:55:04,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:55:04,200 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:55:04,200 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:55:04,412 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:55:04,413 INFO L429 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:55:04,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:55:04,413 INFO L82 PathProgramCache]: Analyzing trace with hash 1709771149, now seen corresponding path program 81 times [2020-10-15 19:55:04,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:55:04,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507170264] [2020-10-15 19:55:04,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:55:04,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:55:04,493 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:04,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507170264] [2020-10-15 19:55:04,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884742460] [2020-10-15 19:55:04,494 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:55:04,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 19:55:04,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:55:04,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:55:04,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:55:04,658 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:04,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:55:04,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:55:04,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388104651] [2020-10-15 19:55:04,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:55:04,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:55:04,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:55:04,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:55:04,660 INFO L87 Difference]: Start difference. First operand 143 states and 352 transitions. Second operand 15 states. [2020-10-15 19:55:04,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:55:04,947 INFO L93 Difference]: Finished difference Result 202 states and 467 transitions. [2020-10-15 19:55:04,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 19:55:04,947 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:55:04,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:55:04,948 INFO L225 Difference]: With dead ends: 202 [2020-10-15 19:55:04,948 INFO L226 Difference]: Without dead ends: 200 [2020-10-15 19:55:04,948 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=147, Invalid=359, Unknown=0, NotChecked=0, Total=506 [2020-10-15 19:55:04,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-10-15 19:55:04,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 143. [2020-10-15 19:55:04,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-15 19:55:04,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 351 transitions. [2020-10-15 19:55:04,951 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 351 transitions. Word has length 13 [2020-10-15 19:55:04,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:55:04,951 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 351 transitions. [2020-10-15 19:55:04,951 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:55:04,952 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 351 transitions. [2020-10-15 19:55:04,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:55:04,952 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:55:04,952 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:55:05,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2020-10-15 19:55:05,153 INFO L429 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:55:05,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:55:05,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1709799979, now seen corresponding path program 82 times [2020-10-15 19:55:05,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:55:05,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127769245] [2020-10-15 19:55:05,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:55:05,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:55:05,228 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:05,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127769245] [2020-10-15 19:55:05,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11017613] [2020-10-15 19:55:05,229 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:55:05,267 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:55:05,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:55:05,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:55:05,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:55:05,414 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:05,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:55:05,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:55:05,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847680981] [2020-10-15 19:55:05,415 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:55:05,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:55:05,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:55:05,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:55:05,415 INFO L87 Difference]: Start difference. First operand 143 states and 351 transitions. Second operand 15 states. [2020-10-15 19:55:05,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:55:05,709 INFO L93 Difference]: Finished difference Result 197 states and 458 transitions. [2020-10-15 19:55:05,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 19:55:05,709 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:55:05,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:55:05,710 INFO L225 Difference]: With dead ends: 197 [2020-10-15 19:55:05,710 INFO L226 Difference]: Without dead ends: 195 [2020-10-15 19:55:05,711 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=144, Invalid=362, Unknown=0, NotChecked=0, Total=506 [2020-10-15 19:55:05,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-10-15 19:55:05,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 142. [2020-10-15 19:55:05,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-15 19:55:05,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 348 transitions. [2020-10-15 19:55:05,714 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 348 transitions. Word has length 13 [2020-10-15 19:55:05,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:55:05,714 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 348 transitions. [2020-10-15 19:55:05,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:55:05,714 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 348 transitions. [2020-10-15 19:55:05,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:55:05,714 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:55:05,714 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:55:05,915 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2020-10-15 19:55:05,915 INFO L429 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:55:05,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:55:05,916 INFO L82 PathProgramCache]: Analyzing trace with hash 1730325978, now seen corresponding path program 83 times [2020-10-15 19:55:05,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:55:05,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706820091] [2020-10-15 19:55:05,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:55:05,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:55:05,990 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:05,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706820091] [2020-10-15 19:55:05,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999338063] [2020-10-15 19:55:05,990 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:55:06,029 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:55:06,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:55:06,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:55:06,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:55:06,229 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:06,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:55:06,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:55:06,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958272439] [2020-10-15 19:55:06,230 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:55:06,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:55:06,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:55:06,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:55:06,231 INFO L87 Difference]: Start difference. First operand 142 states and 348 transitions. Second operand 15 states. [2020-10-15 19:55:06,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:55:06,854 INFO L93 Difference]: Finished difference Result 214 states and 496 transitions. [2020-10-15 19:55:06,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 19:55:06,855 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:55:06,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:55:06,856 INFO L225 Difference]: With dead ends: 214 [2020-10-15 19:55:06,856 INFO L226 Difference]: Without dead ends: 212 [2020-10-15 19:55:06,856 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=227, Invalid=529, Unknown=0, NotChecked=0, Total=756 [2020-10-15 19:55:06,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-10-15 19:55:06,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 144. [2020-10-15 19:55:06,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-15 19:55:06,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 356 transitions. [2020-10-15 19:55:06,861 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 356 transitions. Word has length 13 [2020-10-15 19:55:06,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:55:06,861 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 356 transitions. [2020-10-15 19:55:06,861 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:55:06,861 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 356 transitions. [2020-10-15 19:55:06,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:55:06,862 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:55:06,862 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:55:07,073 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2020-10-15 19:55:07,073 INFO L429 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:55:07,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:55:07,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1730326939, now seen corresponding path program 84 times [2020-10-15 19:55:07,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:55:07,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350605277] [2020-10-15 19:55:07,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:55:07,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:55:07,179 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:07,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350605277] [2020-10-15 19:55:07,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980555246] [2020-10-15 19:55:07,179 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 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:55:07,228 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 19:55:07,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:55:07,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:55:07,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:55:07,352 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:07,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:55:07,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:55:07,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138481812] [2020-10-15 19:55:07,353 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:55:07,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:55:07,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:55:07,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:55:07,354 INFO L87 Difference]: Start difference. First operand 144 states and 356 transitions. Second operand 15 states. [2020-10-15 19:55:07,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:55:07,773 INFO L93 Difference]: Finished difference Result 217 states and 502 transitions. [2020-10-15 19:55:07,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 19:55:07,774 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:55:07,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:55:07,775 INFO L225 Difference]: With dead ends: 217 [2020-10-15 19:55:07,775 INFO L226 Difference]: Without dead ends: 215 [2020-10-15 19:55:07,776 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=207, Invalid=495, Unknown=0, NotChecked=0, Total=702 [2020-10-15 19:55:07,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-15 19:55:07,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 145. [2020-10-15 19:55:07,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-15 19:55:07,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 360 transitions. [2020-10-15 19:55:07,779 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 360 transitions. Word has length 13 [2020-10-15 19:55:07,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:55:07,779 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 360 transitions. [2020-10-15 19:55:07,779 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:55:07,779 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 360 transitions. [2020-10-15 19:55:07,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:55:07,779 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:55:07,779 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:55:07,980 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:55:07,980 INFO L429 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:55:07,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:55:07,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1730989068, now seen corresponding path program 85 times [2020-10-15 19:55:07,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:55:07,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980810768] [2020-10-15 19:55:07,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:55:07,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:55:08,059 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:08,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980810768] [2020-10-15 19:55:08,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089701292] [2020-10-15 19:55:08,060 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 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:55:08,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:55:08,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:55:08,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:55:08,242 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:08,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:55:08,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:55:08,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120905985] [2020-10-15 19:55:08,244 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:55:08,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:55:08,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:55:08,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:55:08,244 INFO L87 Difference]: Start difference. First operand 145 states and 360 transitions. Second operand 15 states. [2020-10-15 19:55:08,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:55:08,688 INFO L93 Difference]: Finished difference Result 211 states and 500 transitions. [2020-10-15 19:55:08,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 19:55:08,689 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:55:08,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:55:08,690 INFO L225 Difference]: With dead ends: 211 [2020-10-15 19:55:08,690 INFO L226 Difference]: Without dead ends: 209 [2020-10-15 19:55:08,691 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=238, Invalid=518, Unknown=0, NotChecked=0, Total=756 [2020-10-15 19:55:08,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-10-15 19:55:08,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 147. [2020-10-15 19:55:08,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-15 19:55:08,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-10-15 19:55:08,694 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-10-15 19:55:08,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:55:08,694 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-10-15 19:55:08,694 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:55:08,694 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-10-15 19:55:08,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:55:08,695 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:55:08,695 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:55:08,898 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:55:08,899 INFO L429 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:55:08,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:55:08,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1731010427, now seen corresponding path program 86 times [2020-10-15 19:55:08,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:55:08,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627888657] [2020-10-15 19:55:08,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:55:08,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:55:08,979 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:08,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627888657] [2020-10-15 19:55:08,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655814190] [2020-10-15 19:55:08,979 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 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:55:09,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:55:09,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:55:09,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:55:09,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:55:09,127 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:55:09,136 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:09,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:55:09,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:55:09,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5475005] [2020-10-15 19:55:09,137 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:55:09,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:55:09,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:55:09,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:55:09,138 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-10-15 19:55:09,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:55:09,633 INFO L93 Difference]: Finished difference Result 211 states and 507 transitions. [2020-10-15 19:55:09,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 19:55:09,633 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:55:09,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:55:09,634 INFO L225 Difference]: With dead ends: 211 [2020-10-15 19:55:09,634 INFO L226 Difference]: Without dead ends: 206 [2020-10-15 19:55:09,634 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=323, Invalid=669, Unknown=0, NotChecked=0, Total=992 [2020-10-15 19:55:09,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-10-15 19:55:09,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 147. [2020-10-15 19:55:09,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-15 19:55:09,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-10-15 19:55:09,638 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-10-15 19:55:09,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:55:09,638 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-10-15 19:55:09,638 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:55:09,638 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-10-15 19:55:09,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:55:09,638 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:55:09,638 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:55:09,839 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2020-10-15 19:55:09,839 INFO L429 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:55:09,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:55:09,840 INFO L82 PathProgramCache]: Analyzing trace with hash 1731011388, now seen corresponding path program 87 times [2020-10-15 19:55:09,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:55:09,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679339075] [2020-10-15 19:55:09,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:55:09,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:55:09,921 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:09,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679339075] [2020-10-15 19:55:09,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143253085] [2020-10-15 19:55:09,922 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 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:55:09,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 19:55:09,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:55:09,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:55:09,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:55:10,073 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:55:10,109 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:10,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:55:10,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:55:10,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42953969] [2020-10-15 19:55:10,110 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:55:10,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:55:10,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:55:10,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:55:10,111 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-10-15 19:55:10,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:55:10,753 INFO L93 Difference]: Finished difference Result 227 states and 546 transitions. [2020-10-15 19:55:10,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 19:55:10,753 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:55:10,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:55:10,754 INFO L225 Difference]: With dead ends: 227 [2020-10-15 19:55:10,754 INFO L226 Difference]: Without dead ends: 222 [2020-10-15 19:55:10,754 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=325, Invalid=731, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 19:55:10,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-10-15 19:55:10,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 145. [2020-10-15 19:55:10,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-15 19:55:10,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 360 transitions. [2020-10-15 19:55:10,757 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 360 transitions. Word has length 13 [2020-10-15 19:55:10,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:55:10,758 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 360 transitions. [2020-10-15 19:55:10,758 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:55:10,758 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 360 transitions. [2020-10-15 19:55:10,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:55:10,758 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:55:10,758 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:55:10,959 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2020-10-15 19:55:10,959 INFO L429 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:55:10,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:55:10,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1731018859, now seen corresponding path program 88 times [2020-10-15 19:55:10,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:55:10,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815286427] [2020-10-15 19:55:10,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:55:10,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:55:11,040 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:11,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815286427] [2020-10-15 19:55:11,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752371322] [2020-10-15 19:55:11,041 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 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:55:11,079 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:55:11,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:55:11,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:55:11,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:55:11,214 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:11,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:55:11,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:55:11,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012560407] [2020-10-15 19:55:11,215 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:55:11,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:55:11,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:55:11,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:55:11,216 INFO L87 Difference]: Start difference. First operand 145 states and 360 transitions. Second operand 15 states. [2020-10-15 19:55:11,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:55:11,713 INFO L93 Difference]: Finished difference Result 221 states and 523 transitions. [2020-10-15 19:55:11,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 19:55:11,714 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:55:11,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:55:11,715 INFO L225 Difference]: With dead ends: 221 [2020-10-15 19:55:11,715 INFO L226 Difference]: Without dead ends: 219 [2020-10-15 19:55:11,716 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=278, Invalid=652, Unknown=0, NotChecked=0, Total=930 [2020-10-15 19:55:11,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-10-15 19:55:11,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 147. [2020-10-15 19:55:11,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-15 19:55:11,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-10-15 19:55:11,719 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-10-15 19:55:11,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:55:11,719 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-10-15 19:55:11,719 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:55:11,719 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-10-15 19:55:11,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:55:11,720 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:55:11,720 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:55:11,920 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:55:11,920 INFO L429 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:55:11,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:55:11,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1731040218, now seen corresponding path program 89 times [2020-10-15 19:55:11,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:55:11,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377395887] [2020-10-15 19:55:11,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:55:11,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:55:12,002 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:12,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377395887] [2020-10-15 19:55:12,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939351829] [2020-10-15 19:55:12,003 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 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:55:12,046 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 19:55:12,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:55:12,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:55:12,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:55:12,149 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:55:12,159 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:12,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:55:12,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:55:12,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169045411] [2020-10-15 19:55:12,159 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:55:12,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:55:12,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:55:12,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:55:12,160 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-10-15 19:55:12,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:55:12,793 INFO L93 Difference]: Finished difference Result 240 states and 577 transitions. [2020-10-15 19:55:12,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 19:55:12,794 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:55:12,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:55:12,795 INFO L225 Difference]: With dead ends: 240 [2020-10-15 19:55:12,795 INFO L226 Difference]: Without dead ends: 232 [2020-10-15 19:55:12,795 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=349, Invalid=773, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 19:55:12,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-10-15 19:55:12,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 148. [2020-10-15 19:55:12,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-15 19:55:12,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 372 transitions. [2020-10-15 19:55:12,799 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 372 transitions. Word has length 13 [2020-10-15 19:55:12,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:55:12,799 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 372 transitions. [2020-10-15 19:55:12,799 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:55:12,799 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 372 transitions. [2020-10-15 19:55:12,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:55:12,800 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:55:12,800 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:55:13,000 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2020-10-15 19:55:13,001 INFO L429 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:55:13,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:55:13,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1731041179, now seen corresponding path program 90 times [2020-10-15 19:55:13,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:55:13,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161989838] [2020-10-15 19:55:13,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:55:13,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:55:13,083 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:13,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161989838] [2020-10-15 19:55:13,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393177652] [2020-10-15 19:55:13,084 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 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:55:13,124 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 19:55:13,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:55:13,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:55:13,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:55:13,229 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:55:13,242 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:13,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:55:13,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:55:13,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111351195] [2020-10-15 19:55:13,243 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:55:13,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:55:13,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:55:13,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:55:13,244 INFO L87 Difference]: Start difference. First operand 148 states and 372 transitions. Second operand 15 states. [2020-10-15 19:55:13,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:55:13,867 INFO L93 Difference]: Finished difference Result 238 states and 576 transitions. [2020-10-15 19:55:13,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 19:55:13,868 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:55:13,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:55:13,868 INFO L225 Difference]: With dead ends: 238 [2020-10-15 19:55:13,868 INFO L226 Difference]: Without dead ends: 230 [2020-10-15 19:55:13,869 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=343, Invalid=779, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 19:55:13,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-10-15 19:55:13,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 142. [2020-10-15 19:55:13,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-15 19:55:13,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 354 transitions. [2020-10-15 19:55:13,872 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 354 transitions. Word has length 13 [2020-10-15 19:55:13,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:55:13,872 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 354 transitions. [2020-10-15 19:55:13,872 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:55:13,872 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 354 transitions. [2020-10-15 19:55:13,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:55:13,872 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:55:13,872 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:55:14,073 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:55:14,073 INFO L429 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:55:14,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:55:14,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1731249499, now seen corresponding path program 91 times [2020-10-15 19:55:14,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:55:14,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952897620] [2020-10-15 19:55:14,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:55:14,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:55:14,152 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:14,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952897620] [2020-10-15 19:55:14,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927888882] [2020-10-15 19:55:14,153 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 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:55:14,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:55:14,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:55:14,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:55:14,326 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:14,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:55:14,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:55:14,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751847854] [2020-10-15 19:55:14,327 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:55:14,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:55:14,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:55:14,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:55:14,328 INFO L87 Difference]: Start difference. First operand 142 states and 354 transitions. Second operand 15 states. [2020-10-15 19:55:14,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:55:14,599 INFO L93 Difference]: Finished difference Result 195 states and 459 transitions. [2020-10-15 19:55:14,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 19:55:14,600 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:55:14,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:55:14,601 INFO L225 Difference]: With dead ends: 195 [2020-10-15 19:55:14,601 INFO L226 Difference]: Without dead ends: 193 [2020-10-15 19:55:14,601 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2020-10-15 19:55:14,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-15 19:55:14,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 142. [2020-10-15 19:55:14,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-15 19:55:14,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 354 transitions. [2020-10-15 19:55:14,603 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 354 transitions. Word has length 13 [2020-10-15 19:55:14,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:55:14,603 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 354 transitions. [2020-10-15 19:55:14,603 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:55:14,603 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 354 transitions. [2020-10-15 19:55:14,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:55:14,604 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:55:14,604 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:55:14,804 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2020-10-15 19:55:14,805 INFO L429 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:55:14,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:55:14,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1731912589, now seen corresponding path program 92 times [2020-10-15 19:55:14,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:55:14,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653218468] [2020-10-15 19:55:14,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:55:14,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:55:14,888 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:14,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653218468] [2020-10-15 19:55:14,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942689265] [2020-10-15 19:55:14,889 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 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:55:14,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:55:14,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:55:14,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:55:14,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:55:15,072 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:15,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:55:15,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:55:15,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243591563] [2020-10-15 19:55:15,073 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:55:15,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:55:15,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:55:15,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:55:15,073 INFO L87 Difference]: Start difference. First operand 142 states and 354 transitions. Second operand 15 states. [2020-10-15 19:55:15,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:55:15,571 INFO L93 Difference]: Finished difference Result 206 states and 489 transitions. [2020-10-15 19:55:15,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 19:55:15,572 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:55:15,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:55:15,573 INFO L225 Difference]: With dead ends: 206 [2020-10-15 19:55:15,573 INFO L226 Difference]: Without dead ends: 204 [2020-10-15 19:55:15,573 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=230, Invalid=526, Unknown=0, NotChecked=0, Total=756 [2020-10-15 19:55:15,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-10-15 19:55:15,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 143. [2020-10-15 19:55:15,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-15 19:55:15,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 356 transitions. [2020-10-15 19:55:15,576 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 356 transitions. Word has length 13 [2020-10-15 19:55:15,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:55:15,576 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 356 transitions. [2020-10-15 19:55:15,576 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:55:15,576 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 356 transitions. [2020-10-15 19:55:15,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:55:15,577 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:55:15,577 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:55:15,777 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:55:15,777 INFO L429 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:55:15,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:55:15,778 INFO L82 PathProgramCache]: Analyzing trace with hash 1731934909, now seen corresponding path program 93 times [2020-10-15 19:55:15,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:55:15,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852247471] [2020-10-15 19:55:15,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:55:15,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:55:15,863 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:15,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852247471] [2020-10-15 19:55:15,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60297337] [2020-10-15 19:55:15,864 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 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:55:15,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 19:55:15,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:55:15,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:55:15,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:55:16,031 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:55:17,497 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:17,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:55:17,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-10-15 19:55:17,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289422298] [2020-10-15 19:55:17,498 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 19:55:17,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:55:17,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 19:55:17,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=171, Unknown=1, NotChecked=0, Total=240 [2020-10-15 19:55:17,499 INFO L87 Difference]: Start difference. First operand 143 states and 356 transitions. Second operand 16 states. [2020-10-15 19:55:19,975 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 25 [2020-10-15 19:55:40,698 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 29 [2020-10-15 19:56:19,059 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2020-10-15 19:56:36,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:36,606 INFO L93 Difference]: Finished difference Result 260 states and 609 transitions. [2020-10-15 19:56:36,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 19:56:36,606 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-10-15 19:56:36,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:36,607 INFO L225 Difference]: With dead ends: 260 [2020-10-15 19:56:36,607 INFO L226 Difference]: Without dead ends: 255 [2020-10-15 19:56:36,607 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 28.9s TimeCoverageRelationStatistics Valid=389, Invalid=934, Unknown=9, NotChecked=0, Total=1332 [2020-10-15 19:56:36,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2020-10-15 19:56:36,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 139. [2020-10-15 19:56:36,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-15 19:56:36,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 339 transitions. [2020-10-15 19:56:36,610 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 339 transitions. Word has length 13 [2020-10-15 19:56:36,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:36,610 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 339 transitions. [2020-10-15 19:56:36,610 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 19:56:36,610 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 339 transitions. [2020-10-15 19:56:36,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:56:36,610 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:36,610 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:36,811 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2020-10-15 19:56:36,811 INFO L429 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:36,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:36,812 INFO L82 PathProgramCache]: Analyzing trace with hash 1931415228, now seen corresponding path program 94 times [2020-10-15 19:56:36,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:36,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215523043] [2020-10-15 19:56:36,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:36,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:36,899 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:36,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215523043] [2020-10-15 19:56:36,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624782434] [2020-10-15 19:56:36,900 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:36,937 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:56:36,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:56:36,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:56:36,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:37,072 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:37,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:37,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:56:37,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145726026] [2020-10-15 19:56:37,073 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:56:37,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:37,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:56:37,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:56:37,074 INFO L87 Difference]: Start difference. First operand 139 states and 339 transitions. Second operand 15 states. [2020-10-15 19:56:37,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:37,301 INFO L93 Difference]: Finished difference Result 194 states and 449 transitions. [2020-10-15 19:56:37,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 19:56:37,302 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:56:37,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:37,303 INFO L225 Difference]: With dead ends: 194 [2020-10-15 19:56:37,303 INFO L226 Difference]: Without dead ends: 192 [2020-10-15 19:56:37,303 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-10-15 19:56:37,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-15 19:56:37,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 141. [2020-10-15 19:56:37,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-15 19:56:37,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 345 transitions. [2020-10-15 19:56:37,306 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 345 transitions. Word has length 13 [2020-10-15 19:56:37,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:37,306 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 345 transitions. [2020-10-15 19:56:37,306 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:56:37,307 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 345 transitions. [2020-10-15 19:56:37,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:56:37,307 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:37,307 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:37,507 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:37,508 INFO L429 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:37,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:37,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1931416189, now seen corresponding path program 95 times [2020-10-15 19:56:37,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:37,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865755516] [2020-10-15 19:56:37,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:37,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:37,602 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:37,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865755516] [2020-10-15 19:56:37,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308491492] [2020-10-15 19:56:37,603 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 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:37,644 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 19:56:37,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:56:37,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:56:37,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:37,798 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:37,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:37,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:56:37,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075182066] [2020-10-15 19:56:37,799 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:56:37,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:37,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:56:37,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:56:37,799 INFO L87 Difference]: Start difference. First operand 141 states and 345 transitions. Second operand 15 states. [2020-10-15 19:56:38,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:38,134 INFO L93 Difference]: Finished difference Result 205 states and 471 transitions. [2020-10-15 19:56:38,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 19:56:38,134 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:56:38,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:38,135 INFO L225 Difference]: With dead ends: 205 [2020-10-15 19:56:38,135 INFO L226 Difference]: Without dead ends: 203 [2020-10-15 19:56:38,135 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2020-10-15 19:56:38,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-10-15 19:56:38,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 142. [2020-10-15 19:56:38,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-15 19:56:38,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 347 transitions. [2020-10-15 19:56:38,139 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 347 transitions. Word has length 13 [2020-10-15 19:56:38,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:38,139 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 347 transitions. [2020-10-15 19:56:38,140 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:56:38,140 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 347 transitions. [2020-10-15 19:56:38,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:56:38,140 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:38,140 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:38,349 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:38,350 INFO L429 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:38,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:38,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1931445019, now seen corresponding path program 96 times [2020-10-15 19:56:38,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:38,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829548101] [2020-10-15 19:56:38,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:38,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:38,440 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:38,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829548101] [2020-10-15 19:56:38,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413133481] [2020-10-15 19:56:38,441 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 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:38,481 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 19:56:38,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:56:38,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:56:38,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:38,603 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:38,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:38,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:56:38,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108837883] [2020-10-15 19:56:38,604 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:56:38,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:38,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:56:38,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:56:38,604 INFO L87 Difference]: Start difference. First operand 142 states and 347 transitions. Second operand 15 states. [2020-10-15 19:56:38,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:38,887 INFO L93 Difference]: Finished difference Result 201 states and 465 transitions. [2020-10-15 19:56:38,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 19:56:38,888 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:56:38,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:38,888 INFO L225 Difference]: With dead ends: 201 [2020-10-15 19:56:38,889 INFO L226 Difference]: Without dead ends: 199 [2020-10-15 19:56:38,889 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2020-10-15 19:56:38,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-15 19:56:38,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 137. [2020-10-15 19:56:38,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-15 19:56:38,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 334 transitions. [2020-10-15 19:56:38,893 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 334 transitions. Word has length 13 [2020-10-15 19:56:38,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:38,893 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 334 transitions. [2020-10-15 19:56:38,893 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:56:38,893 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 334 transitions. [2020-10-15 19:56:38,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:56:38,894 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:38,894 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:39,094 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:39,095 INFO L429 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:39,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:39,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1726322578, now seen corresponding path program 97 times [2020-10-15 19:56:39,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:39,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826709837] [2020-10-15 19:56:39,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:39,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:39,175 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:39,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826709837] [2020-10-15 19:56:39,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678049039] [2020-10-15 19:56:39,176 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 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:39,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:39,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:56:39,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:39,441 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:39,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:39,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:56:39,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608690721] [2020-10-15 19:56:39,442 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:56:39,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:39,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:56:39,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:56:39,443 INFO L87 Difference]: Start difference. First operand 137 states and 334 transitions. Second operand 15 states. [2020-10-15 19:56:39,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:39,793 INFO L93 Difference]: Finished difference Result 194 states and 449 transitions. [2020-10-15 19:56:39,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 19:56:39,794 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:56:39,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:39,795 INFO L225 Difference]: With dead ends: 194 [2020-10-15 19:56:39,795 INFO L226 Difference]: Without dead ends: 192 [2020-10-15 19:56:39,796 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-10-15 19:56:39,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-15 19:56:39,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 140. [2020-10-15 19:56:39,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-15 19:56:39,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 345 transitions. [2020-10-15 19:56:39,800 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 345 transitions. Word has length 13 [2020-10-15 19:56:39,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:39,801 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 345 transitions. [2020-10-15 19:56:39,801 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:56:39,801 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 345 transitions. [2020-10-15 19:56:39,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:56:39,802 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:39,802 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:40,013 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2020-10-15 19:56:40,013 INFO L429 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:40,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:40,014 INFO L82 PathProgramCache]: Analyzing trace with hash -1726321617, now seen corresponding path program 98 times [2020-10-15 19:56:40,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:40,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712466000] [2020-10-15 19:56:40,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:40,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:40,104 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:40,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712466000] [2020-10-15 19:56:40,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452029617] [2020-10-15 19:56:40,105 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 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:40,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:56:40,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:56:40,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:56:40,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:40,313 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:40,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:40,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:56:40,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481689711] [2020-10-15 19:56:40,314 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:56:40,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:40,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:56:40,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:56:40,315 INFO L87 Difference]: Start difference. First operand 140 states and 345 transitions. Second operand 15 states. [2020-10-15 19:56:40,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:40,695 INFO L93 Difference]: Finished difference Result 209 states and 478 transitions. [2020-10-15 19:56:40,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 19:56:40,695 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:56:40,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:40,696 INFO L225 Difference]: With dead ends: 209 [2020-10-15 19:56:40,696 INFO L226 Difference]: Without dead ends: 207 [2020-10-15 19:56:40,696 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2020-10-15 19:56:40,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-15 19:56:40,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 140. [2020-10-15 19:56:40,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-15 19:56:40,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 344 transitions. [2020-10-15 19:56:40,700 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 344 transitions. Word has length 13 [2020-10-15 19:56:40,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:40,700 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 344 transitions. [2020-10-15 19:56:40,700 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:56:40,700 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 344 transitions. [2020-10-15 19:56:40,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:56:40,701 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:40,701 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:40,902 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:40,903 INFO L429 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:40,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:40,903 INFO L82 PathProgramCache]: Analyzing trace with hash -1726292787, now seen corresponding path program 99 times [2020-10-15 19:56:40,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:40,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008780661] [2020-10-15 19:56:40,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:40,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:40,978 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:40,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008780661] [2020-10-15 19:56:40,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009057641] [2020-10-15 19:56:40,979 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:41,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 19:56:41,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:56:41,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:56:41,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:41,161 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:41,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:41,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:56:41,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754459897] [2020-10-15 19:56:41,162 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:56:41,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:41,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:56:41,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:56:41,162 INFO L87 Difference]: Start difference. First operand 140 states and 344 transitions. Second operand 15 states. [2020-10-15 19:56:41,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:41,519 INFO L93 Difference]: Finished difference Result 202 states and 464 transitions. [2020-10-15 19:56:41,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 19:56:41,520 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:56:41,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:41,521 INFO L225 Difference]: With dead ends: 202 [2020-10-15 19:56:41,521 INFO L226 Difference]: Without dead ends: 200 [2020-10-15 19:56:41,521 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2020-10-15 19:56:41,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-10-15 19:56:41,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 139. [2020-10-15 19:56:41,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-15 19:56:41,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 341 transitions. [2020-10-15 19:56:41,523 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 341 transitions. Word has length 13 [2020-10-15 19:56:41,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:41,524 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 341 transitions. [2020-10-15 19:56:41,524 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:56:41,524 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 341 transitions. [2020-10-15 19:56:41,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:56:41,524 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:41,524 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:41,725 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2020-10-15 19:56:41,725 INFO L429 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:41,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:41,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1705766788, now seen corresponding path program 100 times [2020-10-15 19:56:41,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:41,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342065728] [2020-10-15 19:56:41,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:41,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:41,811 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:41,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342065728] [2020-10-15 19:56:41,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213515476] [2020-10-15 19:56:41,811 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 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:41,848 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:56:41,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:56:41,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:56:41,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:41,986 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:41,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:41,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:56:41,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127754296] [2020-10-15 19:56:41,987 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:56:41,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:41,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:56:41,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:56:41,988 INFO L87 Difference]: Start difference. First operand 139 states and 341 transitions. Second operand 15 states. [2020-10-15 19:56:42,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:42,321 INFO L93 Difference]: Finished difference Result 201 states and 465 transitions. [2020-10-15 19:56:42,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 19:56:42,322 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:56:42,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:42,323 INFO L225 Difference]: With dead ends: 201 [2020-10-15 19:56:42,323 INFO L226 Difference]: Without dead ends: 199 [2020-10-15 19:56:42,323 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=177, Invalid=423, Unknown=0, NotChecked=0, Total=600 [2020-10-15 19:56:42,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-15 19:56:42,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 141. [2020-10-15 19:56:42,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-15 19:56:42,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 349 transitions. [2020-10-15 19:56:42,328 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 349 transitions. Word has length 13 [2020-10-15 19:56:42,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:42,328 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 349 transitions. [2020-10-15 19:56:42,328 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:56:42,329 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 349 transitions. [2020-10-15 19:56:42,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:56:42,330 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:42,330 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:42,538 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2020-10-15 19:56:42,539 INFO L429 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:42,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:42,539 INFO L82 PathProgramCache]: Analyzing trace with hash -1705765827, now seen corresponding path program 101 times [2020-10-15 19:56:42,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:42,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154758239] [2020-10-15 19:56:42,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:42,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:42,615 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:42,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154758239] [2020-10-15 19:56:42,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380793827] [2020-10-15 19:56:42,615 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 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:42,651 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 19:56:42,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:56:42,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:56:42,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:42,798 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:42,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:42,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:56:42,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537289024] [2020-10-15 19:56:42,799 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:56:42,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:42,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:56:42,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:56:42,800 INFO L87 Difference]: Start difference. First operand 141 states and 349 transitions. Second operand 15 states. [2020-10-15 19:56:43,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:43,286 INFO L93 Difference]: Finished difference Result 215 states and 495 transitions. [2020-10-15 19:56:43,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 19:56:43,287 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:56:43,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:43,287 INFO L225 Difference]: With dead ends: 215 [2020-10-15 19:56:43,287 INFO L226 Difference]: Without dead ends: 213 [2020-10-15 19:56:43,288 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-10-15 19:56:43,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-10-15 19:56:43,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 142. [2020-10-15 19:56:43,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-15 19:56:43,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 353 transitions. [2020-10-15 19:56:43,290 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 353 transitions. Word has length 13 [2020-10-15 19:56:43,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:43,290 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 353 transitions. [2020-10-15 19:56:43,290 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:56:43,290 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 353 transitions. [2020-10-15 19:56:43,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:56:43,291 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:43,291 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:43,494 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:43,495 INFO L429 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:43,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:43,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1705103698, now seen corresponding path program 102 times [2020-10-15 19:56:43,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:43,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659123376] [2020-10-15 19:56:43,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:43,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:43,579 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:43,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659123376] [2020-10-15 19:56:43,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404539778] [2020-10-15 19:56:43,580 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 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:43,620 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 19:56:43,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:56:43,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:56:43,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:43,754 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:43,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:43,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:56:43,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530525461] [2020-10-15 19:56:43,755 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:56:43,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:43,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:56:43,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:56:43,756 INFO L87 Difference]: Start difference. First operand 142 states and 353 transitions. Second operand 15 states. [2020-10-15 19:56:44,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:44,158 INFO L93 Difference]: Finished difference Result 196 states and 461 transitions. [2020-10-15 19:56:44,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 19:56:44,159 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:56:44,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:44,160 INFO L225 Difference]: With dead ends: 196 [2020-10-15 19:56:44,160 INFO L226 Difference]: Without dead ends: 194 [2020-10-15 19:56:44,161 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2020-10-15 19:56:44,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-10-15 19:56:44,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 144. [2020-10-15 19:56:44,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-15 19:56:44,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-10-15 19:56:44,164 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-10-15 19:56:44,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:44,165 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-10-15 19:56:44,165 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:56:44,165 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-10-15 19:56:44,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:56:44,165 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:44,166 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:44,367 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:44,368 INFO L429 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:44,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:44,368 INFO L82 PathProgramCache]: Analyzing trace with hash -1705082339, now seen corresponding path program 103 times [2020-10-15 19:56:44,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:44,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972518338] [2020-10-15 19:56:44,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:44,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:44,452 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:44,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972518338] [2020-10-15 19:56:44,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146486206] [2020-10-15 19:56:44,453 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 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:44,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:44,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:56:44,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:44,593 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:56:44,604 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:44,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:44,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:56:44,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892186864] [2020-10-15 19:56:44,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:56:44,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:44,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:56:44,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:56:44,606 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-10-15 19:56:44,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:44,909 INFO L93 Difference]: Finished difference Result 191 states and 460 transitions. [2020-10-15 19:56:44,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 19:56:44,910 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:56:44,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:44,911 INFO L225 Difference]: With dead ends: 191 [2020-10-15 19:56:44,911 INFO L226 Difference]: Without dead ends: 186 [2020-10-15 19:56:44,911 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=196, Invalid=404, Unknown=0, NotChecked=0, Total=600 [2020-10-15 19:56:44,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-15 19:56:44,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 144. [2020-10-15 19:56:44,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-15 19:56:44,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-10-15 19:56:44,914 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-10-15 19:56:44,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:44,914 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-10-15 19:56:44,915 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:56:44,915 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-10-15 19:56:44,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:56:44,915 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:44,915 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:45,121 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2020-10-15 19:56:45,122 INFO L429 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:45,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:45,122 INFO L82 PathProgramCache]: Analyzing trace with hash -1705081378, now seen corresponding path program 104 times [2020-10-15 19:56:45,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:45,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739913172] [2020-10-15 19:56:45,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:45,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:45,207 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:45,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739913172] [2020-10-15 19:56:45,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248865063] [2020-10-15 19:56:45,208 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 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:45,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:56:45,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:56:45,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:56:45,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:45,411 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:56:45,472 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:45,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:45,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:56:45,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700690415] [2020-10-15 19:56:45,473 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:56:45,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:45,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:56:45,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:56:45,474 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-10-15 19:56:46,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:46,197 INFO L93 Difference]: Finished difference Result 232 states and 551 transitions. [2020-10-15 19:56:46,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 19:56:46,198 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:56:46,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:46,199 INFO L225 Difference]: With dead ends: 232 [2020-10-15 19:56:46,199 INFO L226 Difference]: Without dead ends: 227 [2020-10-15 19:56:46,199 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=280, Invalid=650, Unknown=0, NotChecked=0, Total=930 [2020-10-15 19:56:46,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-15 19:56:46,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 142. [2020-10-15 19:56:46,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-15 19:56:46,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 353 transitions. [2020-10-15 19:56:46,203 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 353 transitions. Word has length 13 [2020-10-15 19:56:46,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:46,203 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 353 transitions. [2020-10-15 19:56:46,203 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:56:46,203 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 353 transitions. [2020-10-15 19:56:46,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:56:46,204 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:46,204 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:46,413 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:46,414 INFO L429 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:46,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:46,414 INFO L82 PathProgramCache]: Analyzing trace with hash -1705073907, now seen corresponding path program 105 times [2020-10-15 19:56:46,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:46,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739118930] [2020-10-15 19:56:46,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:46,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:46,494 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:46,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739118930] [2020-10-15 19:56:46,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87061204] [2020-10-15 19:56:46,495 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 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:46,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 19:56:46,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:56:46,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:56:46,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:46,692 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:46,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:46,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:56:46,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504448009] [2020-10-15 19:56:46,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:56:46,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:46,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:56:46,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:56:46,694 INFO L87 Difference]: Start difference. First operand 142 states and 353 transitions. Second operand 15 states. [2020-10-15 19:56:47,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:47,255 INFO L93 Difference]: Finished difference Result 222 states and 521 transitions. [2020-10-15 19:56:47,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 19:56:47,256 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:56:47,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:47,256 INFO L225 Difference]: With dead ends: 222 [2020-10-15 19:56:47,257 INFO L226 Difference]: Without dead ends: 220 [2020-10-15 19:56:47,257 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=277, Invalid=653, Unknown=0, NotChecked=0, Total=930 [2020-10-15 19:56:47,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-10-15 19:56:47,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 144. [2020-10-15 19:56:47,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-15 19:56:47,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-10-15 19:56:47,259 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-10-15 19:56:47,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:47,259 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-10-15 19:56:47,259 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:56:47,259 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-10-15 19:56:47,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:56:47,260 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:47,260 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:47,460 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:47,461 INFO L429 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:47,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:47,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1705052548, now seen corresponding path program 106 times [2020-10-15 19:56:47,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:47,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746953584] [2020-10-15 19:56:47,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:47,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:47,544 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:47,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746953584] [2020-10-15 19:56:47,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108762650] [2020-10-15 19:56:47,545 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 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:47,591 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:56:47,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:56:47,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:56:47,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:47,728 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:56:47,762 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:47,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:47,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:56:47,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86765391] [2020-10-15 19:56:47,763 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:56:47,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:47,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:56:47,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:56:47,764 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-10-15 19:56:48,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:48,548 INFO L93 Difference]: Finished difference Result 254 states and 608 transitions. [2020-10-15 19:56:48,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 19:56:48,549 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:56:48,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:48,551 INFO L225 Difference]: With dead ends: 254 [2020-10-15 19:56:48,551 INFO L226 Difference]: Without dead ends: 246 [2020-10-15 19:56:48,551 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=345, Invalid=777, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 19:56:48,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-10-15 19:56:48,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 146. [2020-10-15 19:56:48,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-15 19:56:48,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 370 transitions. [2020-10-15 19:56:48,555 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 370 transitions. Word has length 13 [2020-10-15 19:56:48,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:48,555 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 370 transitions. [2020-10-15 19:56:48,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:56:48,555 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 370 transitions. [2020-10-15 19:56:48,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:56:48,555 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:48,555 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:48,759 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:48,760 INFO L429 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:48,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:48,760 INFO L82 PathProgramCache]: Analyzing trace with hash -1705051587, now seen corresponding path program 107 times [2020-10-15 19:56:48,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:48,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408272790] [2020-10-15 19:56:48,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:48,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:48,845 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:48,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408272790] [2020-10-15 19:56:48,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944097353] [2020-10-15 19:56:48,846 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 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:48,883 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 19:56:48,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:56:48,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:56:48,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:49,012 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:56:49,035 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:49,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:49,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:56:49,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81526625] [2020-10-15 19:56:49,036 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:56:49,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:49,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:56:49,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:56:49,037 INFO L87 Difference]: Start difference. First operand 146 states and 370 transitions. Second operand 15 states. [2020-10-15 19:56:49,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:49,829 INFO L93 Difference]: Finished difference Result 246 states and 581 transitions. [2020-10-15 19:56:49,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 19:56:49,830 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:56:49,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:49,831 INFO L225 Difference]: With dead ends: 246 [2020-10-15 19:56:49,831 INFO L226 Difference]: Without dead ends: 238 [2020-10-15 19:56:49,831 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=384, Invalid=876, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 19:56:49,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-10-15 19:56:49,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 139. [2020-10-15 19:56:49,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-15 19:56:49,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 344 transitions. [2020-10-15 19:56:49,835 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 344 transitions. Word has length 13 [2020-10-15 19:56:49,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:49,836 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 344 transitions. [2020-10-15 19:56:49,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:56:49,836 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 344 transitions. [2020-10-15 19:56:49,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:56:49,836 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:49,836 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:50,046 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable132 [2020-10-15 19:56:50,046 INFO L429 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:50,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:50,047 INFO L82 PathProgramCache]: Analyzing trace with hash -1704843267, now seen corresponding path program 108 times [2020-10-15 19:56:50,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:50,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451574335] [2020-10-15 19:56:50,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:50,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:50,128 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:50,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451574335] [2020-10-15 19:56:50,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817096128] [2020-10-15 19:56:50,129 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 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:50,167 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 19:56:50,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:56:50,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:56:50,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:50,302 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:50,302 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:50,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:56:50,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312644547] [2020-10-15 19:56:50,303 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:56:50,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:50,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:56:50,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:56:50,304 INFO L87 Difference]: Start difference. First operand 139 states and 344 transitions. Second operand 15 states. [2020-10-15 19:56:50,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:50,725 INFO L93 Difference]: Finished difference Result 208 states and 483 transitions. [2020-10-15 19:56:50,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 19:56:50,726 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:56:50,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:50,727 INFO L225 Difference]: With dead ends: 208 [2020-10-15 19:56:50,727 INFO L226 Difference]: Without dead ends: 206 [2020-10-15 19:56:50,727 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=205, Invalid=497, Unknown=0, NotChecked=0, Total=702 [2020-10-15 19:56:50,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-10-15 19:56:50,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 136. [2020-10-15 19:56:50,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-15 19:56:50,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 337 transitions. [2020-10-15 19:56:50,730 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 337 transitions. Word has length 13 [2020-10-15 19:56:50,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:50,730 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 337 transitions. [2020-10-15 19:56:50,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:56:50,731 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 337 transitions. [2020-10-15 19:56:50,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:56:50,731 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:50,731 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:50,931 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2020-10-15 19:56:50,932 INFO L429 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:50,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:50,932 INFO L82 PathProgramCache]: Analyzing trace with hash -1704180177, now seen corresponding path program 109 times [2020-10-15 19:56:50,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:50,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120907785] [2020-10-15 19:56:50,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:50,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:51,020 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:51,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120907785] [2020-10-15 19:56:51,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310896520] [2020-10-15 19:56:51,021 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 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:51,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:51,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:56:51,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:51,190 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:51,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:51,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:56:51,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269808528] [2020-10-15 19:56:51,191 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:56:51,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:51,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:56:51,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:56:51,192 INFO L87 Difference]: Start difference. First operand 136 states and 337 transitions. Second operand 15 states. [2020-10-15 19:56:51,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:51,745 INFO L93 Difference]: Finished difference Result 215 states and 507 transitions. [2020-10-15 19:56:51,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 19:56:51,746 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:56:51,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:51,746 INFO L225 Difference]: With dead ends: 215 [2020-10-15 19:56:51,746 INFO L226 Difference]: Without dead ends: 213 [2020-10-15 19:56:51,746 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=265, Invalid=605, Unknown=0, NotChecked=0, Total=870 [2020-10-15 19:56:51,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-10-15 19:56:51,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 137. [2020-10-15 19:56:51,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-15 19:56:51,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 341 transitions. [2020-10-15 19:56:51,749 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 341 transitions. Word has length 13 [2020-10-15 19:56:51,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:51,749 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 341 transitions. [2020-10-15 19:56:51,749 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:56:51,750 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 341 transitions. [2020-10-15 19:56:51,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:56:51,750 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:51,750 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:51,950 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2020-10-15 19:56:51,951 INFO L429 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:51,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:51,951 INFO L82 PathProgramCache]: Analyzing trace with hash -1704158818, now seen corresponding path program 110 times [2020-10-15 19:56:51,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:51,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081377762] [2020-10-15 19:56:51,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:51,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:52,037 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:52,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081377762] [2020-10-15 19:56:52,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236144096] [2020-10-15 19:56:52,038 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 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:52,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:56:52,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:56:52,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:56:52,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:52,196 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:56:52,207 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:52,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:52,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:56:52,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090772070] [2020-10-15 19:56:52,209 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:56:52,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:52,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:56:52,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:56:52,209 INFO L87 Difference]: Start difference. First operand 137 states and 341 transitions. Second operand 15 states. [2020-10-15 19:56:52,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:52,809 INFO L93 Difference]: Finished difference Result 236 states and 563 transitions. [2020-10-15 19:56:52,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 19:56:52,810 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:56:52,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:52,810 INFO L225 Difference]: With dead ends: 236 [2020-10-15 19:56:52,811 INFO L226 Difference]: Without dead ends: 228 [2020-10-15 19:56:52,811 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=343, Invalid=779, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 19:56:52,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-10-15 19:56:52,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 137. [2020-10-15 19:56:52,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-15 19:56:52,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 341 transitions. [2020-10-15 19:56:52,814 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 341 transitions. Word has length 13 [2020-10-15 19:56:52,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:52,814 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 341 transitions. [2020-10-15 19:56:52,814 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:56:52,814 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 341 transitions. [2020-10-15 19:56:52,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:56:52,814 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:52,814 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:53,015 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2020-10-15 19:56:53,015 INFO L429 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:53,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:53,016 INFO L82 PathProgramCache]: Analyzing trace with hash -1704157857, now seen corresponding path program 111 times [2020-10-15 19:56:53,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:53,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056006529] [2020-10-15 19:56:53,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:53,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:53,112 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:53,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056006529] [2020-10-15 19:56:53,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984628770] [2020-10-15 19:56:53,113 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 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:53,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 19:56:53,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:56:53,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:56:53,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:53,264 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:56:53,275 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:53,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:53,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:56:53,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702910969] [2020-10-15 19:56:53,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:56:53,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:53,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:56:53,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:56:53,276 INFO L87 Difference]: Start difference. First operand 137 states and 341 transitions. Second operand 15 states. [2020-10-15 19:56:53,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:53,957 INFO L93 Difference]: Finished difference Result 241 states and 576 transitions. [2020-10-15 19:56:53,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 19:56:53,958 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:56:53,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:53,960 INFO L225 Difference]: With dead ends: 241 [2020-10-15 19:56:53,960 INFO L226 Difference]: Without dead ends: 233 [2020-10-15 19:56:53,960 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=349, Invalid=773, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 19:56:53,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-15 19:56:53,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 133. [2020-10-15 19:56:53,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-15 19:56:53,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 324 transitions. [2020-10-15 19:56:53,964 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 324 transitions. Word has length 13 [2020-10-15 19:56:53,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:53,964 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 324 transitions. [2020-10-15 19:56:53,964 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:56:53,964 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 324 transitions. [2020-10-15 19:56:53,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:56:53,965 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:53,965 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:54,175 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2020-10-15 19:56:54,176 INFO L429 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:54,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:54,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1704129027, now seen corresponding path program 112 times [2020-10-15 19:56:54,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:54,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759503328] [2020-10-15 19:56:54,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:54,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:54,258 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:54,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759503328] [2020-10-15 19:56:54,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124490298] [2020-10-15 19:56:54,258 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 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:54,314 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:56:54,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:56:54,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:56:54,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:54,495 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:56:54,517 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:54,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:54,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:56:54,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205051151] [2020-10-15 19:56:54,518 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:56:54,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:54,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:56:54,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:56:54,519 INFO L87 Difference]: Start difference. First operand 133 states and 324 transitions. Second operand 15 states. [2020-10-15 19:56:55,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:55,426 INFO L93 Difference]: Finished difference Result 232 states and 545 transitions. [2020-10-15 19:56:55,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 19:56:55,427 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:56:55,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:55,428 INFO L225 Difference]: With dead ends: 232 [2020-10-15 19:56:55,428 INFO L226 Difference]: Without dead ends: 224 [2020-10-15 19:56:55,429 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=325, Invalid=731, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 19:56:55,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-10-15 19:56:55,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 130. [2020-10-15 19:56:55,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-15 19:56:55,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 305 transitions. [2020-10-15 19:56:55,432 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 305 transitions. Word has length 13 [2020-10-15 19:56:55,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:55,432 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 305 transitions. [2020-10-15 19:56:55,432 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:56:55,432 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 305 transitions. [2020-10-15 19:56:55,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:56:55,433 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:55,433 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:55,642 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:55,643 INFO L429 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:55,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:55,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1141268816, now seen corresponding path program 6 times [2020-10-15 19:56:55,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:55,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875840898] [2020-10-15 19:56:55,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:55,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:55,768 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:55,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875840898] [2020-10-15 19:56:55,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394041180] [2020-10-15 19:56:55,769 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 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:55,809 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-15 19:56:55,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:56:55,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:56:55,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:56,018 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:56:56,069 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:56,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:56,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-10-15 19:56:56,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915504220] [2020-10-15 19:56:56,071 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 19:56:56,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:56,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 19:56:56,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2020-10-15 19:56:56,072 INFO L87 Difference]: Start difference. First operand 130 states and 305 transitions. Second operand 18 states. [2020-10-15 19:56:56,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:56,402 INFO L93 Difference]: Finished difference Result 185 states and 431 transitions. [2020-10-15 19:56:56,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 19:56:56,404 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 13 [2020-10-15 19:56:56,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:56,405 INFO L225 Difference]: With dead ends: 185 [2020-10-15 19:56:56,405 INFO L226 Difference]: Without dead ends: 180 [2020-10-15 19:56:56,405 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2020-10-15 19:56:56,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-15 19:56:56,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 139. [2020-10-15 19:56:56,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-15 19:56:56,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 341 transitions. [2020-10-15 19:56:56,410 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 341 transitions. Word has length 13 [2020-10-15 19:56:56,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:56,410 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 341 transitions. [2020-10-15 19:56:56,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 19:56:56,411 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 341 transitions. [2020-10-15 19:56:56,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:56:56,411 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:56,412 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:56,612 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2020-10-15 19:56:56,612 INFO L429 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:56,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:56,613 INFO L82 PathProgramCache]: Analyzing trace with hash 33766584, now seen corresponding path program 21 times [2020-10-15 19:56:56,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:56,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517467580] [2020-10-15 19:56:56,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:56,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:56,790 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:56,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517467580] [2020-10-15 19:56:56,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260171815] [2020-10-15 19:56:56,791 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 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:56,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-15 19:56:56,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:56:56,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:56:56,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:57,074 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:57,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:57,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:56:57,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128581636] [2020-10-15 19:56:57,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:56:57,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:57,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:56:57,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:56:57,077 INFO L87 Difference]: Start difference. First operand 139 states and 341 transitions. Second operand 17 states. [2020-10-15 19:56:57,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:57,154 INFO L93 Difference]: Finished difference Result 180 states and 423 transitions. [2020-10-15 19:56:57,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 19:56:57,154 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-15 19:56:57,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:57,155 INFO L225 Difference]: With dead ends: 180 [2020-10-15 19:56:57,155 INFO L226 Difference]: Without dead ends: 177 [2020-10-15 19:56:57,156 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:56:57,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-15 19:56:57,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 148. [2020-10-15 19:56:57,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-15 19:56:57,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 362 transitions. [2020-10-15 19:56:57,158 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 362 transitions. Word has length 13 [2020-10-15 19:56:57,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:57,159 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 362 transitions. [2020-10-15 19:56:57,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:56:57,159 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 362 transitions. [2020-10-15 19:56:57,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:56:57,159 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:57,159 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:57,359 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2020-10-15 19:56:57,360 INFO L429 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:57,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:57,360 INFO L82 PathProgramCache]: Analyzing trace with hash -913710200, now seen corresponding path program 22 times [2020-10-15 19:56:57,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:57,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135497545] [2020-10-15 19:56:57,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:57,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:57,527 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:57,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135497545] [2020-10-15 19:56:57,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247574296] [2020-10-15 19:56:57,527 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 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:57,563 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:56:57,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:56:57,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:56:57,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:57,749 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:57,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:57,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:56:57,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585661019] [2020-10-15 19:56:57,750 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:56:57,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:57,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:56:57,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:56:57,751 INFO L87 Difference]: Start difference. First operand 148 states and 362 transitions. Second operand 17 states. [2020-10-15 19:56:57,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:57,850 INFO L93 Difference]: Finished difference Result 197 states and 456 transitions. [2020-10-15 19:56:57,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 19:56:57,851 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-15 19:56:57,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:57,852 INFO L225 Difference]: With dead ends: 197 [2020-10-15 19:56:57,852 INFO L226 Difference]: Without dead ends: 194 [2020-10-15 19:56:57,852 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-10-15 19:56:57,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-10-15 19:56:57,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 148. [2020-10-15 19:56:57,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-15 19:56:57,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 362 transitions. [2020-10-15 19:56:57,855 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 362 transitions. Word has length 13 [2020-10-15 19:56:57,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:57,856 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 362 transitions. [2020-10-15 19:56:57,856 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:56:57,856 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 362 transitions. [2020-10-15 19:56:57,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:56:57,856 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:57,856 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:58,058 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:58,058 INFO L429 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:58,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:58,060 INFO L82 PathProgramCache]: Analyzing trace with hash -1775557960, now seen corresponding path program 23 times [2020-10-15 19:56:58,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:58,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153554373] [2020-10-15 19:56:58,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:58,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:58,207 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:58,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153554373] [2020-10-15 19:56:58,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955612269] [2020-10-15 19:56:58,207 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 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:58,245 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-15 19:56:58,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:56:58,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:56:58,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:58,415 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:58,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:58,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:56:58,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350632416] [2020-10-15 19:56:58,416 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:56:58,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:58,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:56:58,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:56:58,416 INFO L87 Difference]: Start difference. First operand 148 states and 362 transitions. Second operand 17 states. [2020-10-15 19:56:58,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:58,524 INFO L93 Difference]: Finished difference Result 196 states and 456 transitions. [2020-10-15 19:56:58,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 19:56:58,525 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-15 19:56:58,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:58,526 INFO L225 Difference]: With dead ends: 196 [2020-10-15 19:56:58,526 INFO L226 Difference]: Without dead ends: 193 [2020-10-15 19:56:58,526 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-10-15 19:56:58,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-15 19:56:58,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 149. [2020-10-15 19:56:58,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-15 19:56:58,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 367 transitions. [2020-10-15 19:56:58,529 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 367 transitions. Word has length 13 [2020-10-15 19:56:58,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:58,529 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 367 transitions. [2020-10-15 19:56:58,529 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:56:58,529 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 367 transitions. [2020-10-15 19:56:58,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:56:58,530 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:58,530 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:58,730 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:58,731 INFO L429 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:58,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:58,731 INFO L82 PathProgramCache]: Analyzing trace with hash -1110622840, now seen corresponding path program 24 times [2020-10-15 19:56:58,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:58,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277794681] [2020-10-15 19:56:58,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:58,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:58,860 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:58,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277794681] [2020-10-15 19:56:58,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636405048] [2020-10-15 19:56:58,861 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 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:58,902 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-15 19:56:58,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:56:58,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:56:58,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:59,093 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:59,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:59,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:56:59,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534721447] [2020-10-15 19:56:59,094 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:56:59,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:59,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:56:59,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:56:59,095 INFO L87 Difference]: Start difference. First operand 149 states and 367 transitions. Second operand 17 states. [2020-10-15 19:56:59,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:59,245 INFO L93 Difference]: Finished difference Result 195 states and 456 transitions. [2020-10-15 19:56:59,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 19:56:59,247 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-15 19:56:59,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:59,247 INFO L225 Difference]: With dead ends: 195 [2020-10-15 19:56:59,248 INFO L226 Difference]: Without dead ends: 192 [2020-10-15 19:56:59,248 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2020-10-15 19:56:59,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-15 19:56:59,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 150. [2020-10-15 19:56:59,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-10-15 19:56:59,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 372 transitions. [2020-10-15 19:56:59,251 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 372 transitions. Word has length 13 [2020-10-15 19:56:59,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:59,251 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 372 transitions. [2020-10-15 19:56:59,251 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:56:59,251 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 372 transitions. [2020-10-15 19:56:59,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:56:59,251 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:59,251 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:59,452 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:59,452 INFO L429 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:59,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:59,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1089173320, now seen corresponding path program 25 times [2020-10-15 19:56:59,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:59,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685458898] [2020-10-15 19:56:59,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:59,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:59,569 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:59,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685458898] [2020-10-15 19:56:59,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333119944] [2020-10-15 19:56:59,569 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 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:59,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:59,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:56:59,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:59,784 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:59,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:59,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:56:59,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132783950] [2020-10-15 19:56:59,785 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:56:59,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:59,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:56:59,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:56:59,786 INFO L87 Difference]: Start difference. First operand 150 states and 372 transitions. Second operand 17 states. [2020-10-15 19:56:59,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:59,967 INFO L93 Difference]: Finished difference Result 194 states and 456 transitions. [2020-10-15 19:56:59,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 19:56:59,968 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-15 19:56:59,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:59,969 INFO L225 Difference]: With dead ends: 194 [2020-10-15 19:56:59,969 INFO L226 Difference]: Without dead ends: 191 [2020-10-15 19:56:59,969 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-10-15 19:56:59,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-10-15 19:56:59,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 152. [2020-10-15 19:56:59,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-15 19:56:59,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 379 transitions. [2020-10-15 19:56:59,973 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 379 transitions. Word has length 13 [2020-10-15 19:56:59,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:59,973 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 379 transitions. [2020-10-15 19:56:59,973 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:56:59,973 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 379 transitions. [2020-10-15 19:56:59,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:56:59,974 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:59,974 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:57:00,183 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:00,184 INFO L429 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:57:00,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:57:00,184 INFO L82 PathProgramCache]: Analyzing trace with hash -1088481400, now seen corresponding path program 26 times [2020-10-15 19:57:00,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:57:00,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993940049] [2020-10-15 19:57:00,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:57:00,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:57:00,289 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:00,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993940049] [2020-10-15 19:57:00,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013608455] [2020-10-15 19:57:00,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:00,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:57:00,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:57:00,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:57:00,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:57:00,642 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:00,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:57:00,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:57:00,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052674731] [2020-10-15 19:57:00,643 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:57:00,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:57:00,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:57:00,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:57:00,644 INFO L87 Difference]: Start difference. First operand 152 states and 379 transitions. Second operand 17 states. [2020-10-15 19:57:00,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:57:00,976 INFO L93 Difference]: Finished difference Result 193 states and 456 transitions. [2020-10-15 19:57:00,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 19:57:00,977 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-15 19:57:00,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:57:00,979 INFO L225 Difference]: With dead ends: 193 [2020-10-15 19:57:00,979 INFO L226 Difference]: Without dead ends: 190 [2020-10-15 19:57:00,979 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2020-10-15 19:57:00,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-10-15 19:57:00,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 154. [2020-10-15 19:57:00,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-15 19:57:00,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 386 transitions. [2020-10-15 19:57:00,984 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 386 transitions. Word has length 13 [2020-10-15 19:57:00,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:57:00,985 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 386 transitions. [2020-10-15 19:57:00,985 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:57:00,985 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 386 transitions. [2020-10-15 19:57:00,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:57:00,986 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:57:00,986 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:57:01,198 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2020-10-15 19:57:01,198 INFO L429 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:57:01,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:57:01,199 INFO L82 PathProgramCache]: Analyzing trace with hash -1088459080, now seen corresponding path program 27 times [2020-10-15 19:57:01,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:57:01,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318064408] [2020-10-15 19:57:01,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:57:01,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:57:01,372 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:01,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318064408] [2020-10-15 19:57:01,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107133334] [2020-10-15 19:57:01,373 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 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:01,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-15 19:57:01,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:57:01,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:57:01,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:57:01,718 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:57:01,745 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:01,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:57:01,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:57:01,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236709091] [2020-10-15 19:57:01,747 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:57:01,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:57:01,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:57:01,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:57:01,748 INFO L87 Difference]: Start difference. First operand 154 states and 386 transitions. Second operand 17 states. [2020-10-15 19:57:02,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:57:02,161 INFO L93 Difference]: Finished difference Result 202 states and 480 transitions. [2020-10-15 19:57:02,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 19:57:02,162 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-15 19:57:02,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:57:02,164 INFO L225 Difference]: With dead ends: 202 [2020-10-15 19:57:02,164 INFO L226 Difference]: Without dead ends: 196 [2020-10-15 19:57:02,164 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=178, Invalid=374, Unknown=0, NotChecked=0, Total=552 [2020-10-15 19:57:02,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-15 19:57:02,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 151. [2020-10-15 19:57:02,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-15 19:57:02,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 382 transitions. [2020-10-15 19:57:02,170 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 382 transitions. Word has length 13 [2020-10-15 19:57:02,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:57:02,170 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 382 transitions. [2020-10-15 19:57:02,170 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:57:02,170 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 382 transitions. [2020-10-15 19:57:02,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:57:02,171 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:57:02,171 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:57:02,384 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2020-10-15 19:57:02,384 INFO L429 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:57:02,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:57:02,385 INFO L82 PathProgramCache]: Analyzing trace with hash -195697579, now seen corresponding path program 113 times [2020-10-15 19:57:02,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:57:02,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548611698] [2020-10-15 19:57:02,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:57:02,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:57:02,589 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:02,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548611698] [2020-10-15 19:57:02,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377382072] [2020-10-15 19:57:02,590 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 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:02,652 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 19:57:02,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:57:02,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:57:02,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:57:02,847 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:02,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:57:02,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:57:02,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659268858] [2020-10-15 19:57:02,848 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:57:02,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:57:02,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:57:02,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:57:02,849 INFO L87 Difference]: Start difference. First operand 151 states and 382 transitions. Second operand 17 states. [2020-10-15 19:57:02,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:57:02,919 INFO L93 Difference]: Finished difference Result 188 states and 456 transitions. [2020-10-15 19:57:02,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 19:57:02,920 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:57:02,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:57:02,921 INFO L225 Difference]: With dead ends: 188 [2020-10-15 19:57:02,921 INFO L226 Difference]: Without dead ends: 186 [2020-10-15 19:57:02,922 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:57:02,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-15 19:57:02,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 159. [2020-10-15 19:57:02,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-15 19:57:02,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 406 transitions. [2020-10-15 19:57:02,925 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 406 transitions. Word has length 14 [2020-10-15 19:57:02,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:57:02,925 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 406 transitions. [2020-10-15 19:57:02,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:57:02,925 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 406 transitions. [2020-10-15 19:57:02,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:57:02,926 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:57:02,926 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:57:03,134 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2020-10-15 19:57:03,134 INFO L429 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:57:03,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:57:03,135 INFO L82 PathProgramCache]: Analyzing trace with hash -195696618, now seen corresponding path program 114 times [2020-10-15 19:57:03,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:57:03,135 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956960033] [2020-10-15 19:57:03,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:57:03,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:57:03,263 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:03,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956960033] [2020-10-15 19:57:03,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975884143] [2020-10-15 19:57:03,264 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 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:03,302 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 19:57:03,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:57:03,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:57:03,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:57:03,511 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:03,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:57:03,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:57:03,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460435978] [2020-10-15 19:57:03,512 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:57:03,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:57:03,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:57:03,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:57:03,512 INFO L87 Difference]: Start difference. First operand 159 states and 406 transitions. Second operand 17 states. [2020-10-15 19:57:03,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:57:03,760 INFO L93 Difference]: Finished difference Result 199 states and 478 transitions. [2020-10-15 19:57:03,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 19:57:03,761 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:57:03,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:57:03,761 INFO L225 Difference]: With dead ends: 199 [2020-10-15 19:57:03,761 INFO L226 Difference]: Without dead ends: 197 [2020-10-15 19:57:03,761 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2020-10-15 19:57:03,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-10-15 19:57:03,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 157. [2020-10-15 19:57:03,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-15 19:57:03,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 400 transitions. [2020-10-15 19:57:03,765 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 400 transitions. Word has length 14 [2020-10-15 19:57:03,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:57:03,765 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 400 transitions. [2020-10-15 19:57:03,765 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:57:03,765 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 400 transitions. [2020-10-15 19:57:03,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:57:03,766 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:57:03,766 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:57:03,966 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2020-10-15 19:57:03,966 INFO L429 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:57:03,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:57:03,967 INFO L82 PathProgramCache]: Analyzing trace with hash -195667788, now seen corresponding path program 115 times [2020-10-15 19:57:03,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:57:03,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411325974] [2020-10-15 19:57:03,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:57:03,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:57:04,089 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:04,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411325974] [2020-10-15 19:57:04,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289743554] [2020-10-15 19:57:04,090 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 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:04,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:57:04,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:57:04,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:57:04,372 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:04,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:57:04,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:57:04,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78796687] [2020-10-15 19:57:04,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:57:04,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:57:04,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:57:04,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:57:04,374 INFO L87 Difference]: Start difference. First operand 157 states and 400 transitions. Second operand 17 states. [2020-10-15 19:57:04,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:57:04,695 INFO L93 Difference]: Finished difference Result 210 states and 500 transitions. [2020-10-15 19:57:04,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 19:57:04,695 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:57:04,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:57:04,696 INFO L225 Difference]: With dead ends: 210 [2020-10-15 19:57:04,696 INFO L226 Difference]: Without dead ends: 208 [2020-10-15 19:57:04,697 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=174, Invalid=332, Unknown=0, NotChecked=0, Total=506 [2020-10-15 19:57:04,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-10-15 19:57:04,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 155. [2020-10-15 19:57:04,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-15 19:57:04,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 394 transitions. [2020-10-15 19:57:04,700 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 394 transitions. Word has length 14 [2020-10-15 19:57:04,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:57:04,700 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 394 transitions. [2020-10-15 19:57:04,700 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:57:04,700 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 394 transitions. [2020-10-15 19:57:04,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:57:04,700 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:57:04,700 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:57:04,901 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2020-10-15 19:57:04,901 INFO L429 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:57:04,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:57:04,902 INFO L82 PathProgramCache]: Analyzing trace with hash -194774058, now seen corresponding path program 116 times [2020-10-15 19:57:04,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:57:04,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491914424] [2020-10-15 19:57:04,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:57:04,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:57:05,022 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:05,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491914424] [2020-10-15 19:57:05,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372360585] [2020-10-15 19:57:05,023 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 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:05,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:57:05,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:57:05,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:57:05,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:57:05,339 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:05,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:57:05,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:57:05,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228391655] [2020-10-15 19:57:05,340 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:57:05,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:57:05,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:57:05,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:57:05,341 INFO L87 Difference]: Start difference. First operand 155 states and 394 transitions. Second operand 17 states. [2020-10-15 19:57:05,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:57:05,682 INFO L93 Difference]: Finished difference Result 210 states and 500 transitions. [2020-10-15 19:57:05,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 19:57:05,683 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:57:05,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:57:05,684 INFO L225 Difference]: With dead ends: 210 [2020-10-15 19:57:05,684 INFO L226 Difference]: Without dead ends: 208 [2020-10-15 19:57:05,685 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=190, Invalid=362, Unknown=0, NotChecked=0, Total=552 [2020-10-15 19:57:05,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-10-15 19:57:05,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 157. [2020-10-15 19:57:05,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-15 19:57:05,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 400 transitions. [2020-10-15 19:57:05,688 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 400 transitions. Word has length 14 [2020-10-15 19:57:05,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:57:05,688 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 400 transitions. [2020-10-15 19:57:05,688 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:57:05,688 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 400 transitions. [2020-10-15 19:57:05,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:57:05,689 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:57:05,689 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:57:05,889 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2020-10-15 19:57:05,889 INFO L429 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:57:05,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:57:05,890 INFO L82 PathProgramCache]: Analyzing trace with hash -194773097, now seen corresponding path program 117 times [2020-10-15 19:57:05,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:57:05,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843415375] [2020-10-15 19:57:05,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:57:05,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:57:06,007 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:06,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843415375] [2020-10-15 19:57:06,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328001039] [2020-10-15 19:57:06,008 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 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:06,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 19:57:06,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:57:06,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:57:06,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:57:10,498 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:10,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:57:10,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:57:10,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6501595] [2020-10-15 19:57:10,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:57:10,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:57:10,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:57:10,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=187, Unknown=1, NotChecked=0, Total=272 [2020-10-15 19:57:10,499 INFO L87 Difference]: Start difference. First operand 157 states and 400 transitions. Second operand 17 states. [2020-10-15 19:57:14,710 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-15 19:57:14,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:57:14,993 INFO L93 Difference]: Finished difference Result 218 states and 517 transitions. [2020-10-15 19:57:14,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 19:57:14,994 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:57:14,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:57:14,995 INFO L225 Difference]: With dead ends: 218 [2020-10-15 19:57:14,995 INFO L226 Difference]: Without dead ends: 216 [2020-10-15 19:57:14,996 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=183, Invalid=368, Unknown=1, NotChecked=0, Total=552 [2020-10-15 19:57:14,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-15 19:57:14,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 156. [2020-10-15 19:57:14,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-15 19:57:14,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-10-15 19:57:15,000 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-10-15 19:57:15,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:57:15,000 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-10-15 19:57:15,000 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:57:15,000 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-10-15 19:57:15,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:57:15,001 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:57:15,001 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:57:15,201 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:15,201 INFO L429 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:57:15,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:57:15,202 INFO L82 PathProgramCache]: Analyzing trace with hash -194744267, now seen corresponding path program 118 times [2020-10-15 19:57:15,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:57:15,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227657613] [2020-10-15 19:57:15,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:57:15,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:57:15,332 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:15,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227657613] [2020-10-15 19:57:15,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878391780] [2020-10-15 19:57:15,332 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 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:15,378 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:57:15,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:57:15,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:57:15,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:57:15,704 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:15,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:57:15,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:57:15,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080923183] [2020-10-15 19:57:15,705 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:57:15,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:57:15,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:57:15,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:57:15,705 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-10-15 19:57:16,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:57:16,096 INFO L93 Difference]: Finished difference Result 212 states and 507 transitions. [2020-10-15 19:57:16,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 19:57:16,097 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:57:16,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:57:16,098 INFO L225 Difference]: With dead ends: 212 [2020-10-15 19:57:16,098 INFO L226 Difference]: Without dead ends: 210 [2020-10-15 19:57:16,098 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=190, Invalid=362, Unknown=0, NotChecked=0, Total=552 [2020-10-15 19:57:16,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-10-15 19:57:16,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 153. [2020-10-15 19:57:16,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-15 19:57:16,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 388 transitions. [2020-10-15 19:57:16,101 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 388 transitions. Word has length 14 [2020-10-15 19:57:16,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:57:16,101 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 388 transitions. [2020-10-15 19:57:16,101 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:57:16,101 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 388 transitions. [2020-10-15 19:57:16,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:57:16,102 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:57:16,102 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:57:16,302 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,145 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:16,303 INFO L429 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:57:16,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:57:16,303 INFO L82 PathProgramCache]: Analyzing trace with hash -167068428, now seen corresponding path program 119 times [2020-10-15 19:57:16,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:57:16,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799815261] [2020-10-15 19:57:16,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:57:16,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:57:16,425 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:16,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799815261] [2020-10-15 19:57:16,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213109979] [2020-10-15 19:57:16,426 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 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:16,465 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 19:57:16,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:57:16,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:57:16,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:57:16,650 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:16,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:57:16,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:57:16,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435523308] [2020-10-15 19:57:16,651 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:57:16,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:57:16,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:57:16,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:57:16,652 INFO L87 Difference]: Start difference. First operand 153 states and 388 transitions. Second operand 17 states. [2020-10-15 19:57:17,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:57:17,027 INFO L93 Difference]: Finished difference Result 212 states and 504 transitions. [2020-10-15 19:57:17,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 19:57:17,028 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:57:17,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:57:17,028 INFO L225 Difference]: With dead ends: 212 [2020-10-15 19:57:17,028 INFO L226 Difference]: Without dead ends: 210 [2020-10-15 19:57:17,028 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2020-10-15 19:57:17,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-10-15 19:57:17,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 156. [2020-10-15 19:57:17,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-15 19:57:17,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-10-15 19:57:17,032 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-10-15 19:57:17,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:57:17,032 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-10-15 19:57:17,032 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:57:17,032 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-10-15 19:57:17,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:57:17,032 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:57:17,032 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:57:17,233 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:17,233 INFO L429 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:57:17,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:57:17,234 INFO L82 PathProgramCache]: Analyzing trace with hash -167067467, now seen corresponding path program 120 times [2020-10-15 19:57:17,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:57:17,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801723503] [2020-10-15 19:57:17,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:57:17,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:57:17,359 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:17,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801723503] [2020-10-15 19:57:17,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708416021] [2020-10-15 19:57:17,360 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 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:17,399 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 19:57:17,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:57:17,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:57:17,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:57:17,602 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:17,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:57:17,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:57:17,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023767939] [2020-10-15 19:57:17,603 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:57:17,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:57:17,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:57:17,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:57:17,603 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-10-15 19:57:17,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:57:17,990 INFO L93 Difference]: Finished difference Result 224 states and 529 transitions. [2020-10-15 19:57:17,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 19:57:17,991 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:57:17,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:57:17,991 INFO L225 Difference]: With dead ends: 224 [2020-10-15 19:57:17,992 INFO L226 Difference]: Without dead ends: 222 [2020-10-15 19:57:17,992 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=210, Invalid=440, Unknown=0, NotChecked=0, Total=650 [2020-10-15 19:57:17,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-10-15 19:57:17,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 156. [2020-10-15 19:57:17,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-15 19:57:17,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-10-15 19:57:17,996 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-10-15 19:57:17,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:57:17,996 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-10-15 19:57:17,996 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:57:17,996 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-10-15 19:57:17,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:57:17,997 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:57:17,997 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:57:18,205 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:18,206 INFO L429 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:57:18,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:57:18,206 INFO L82 PathProgramCache]: Analyzing trace with hash -167038637, now seen corresponding path program 121 times [2020-10-15 19:57:18,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:57:18,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729650938] [2020-10-15 19:57:18,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:57:18,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:57:18,325 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:18,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729650938] [2020-10-15 19:57:18,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324977003] [2020-10-15 19:57:18,326 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 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:18,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:57:18,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:57:18,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:57:18,564 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:18,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:57:18,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:57:18,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229935939] [2020-10-15 19:57:18,565 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:57:18,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:57:18,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:57:18,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:57:18,566 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-10-15 19:57:18,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:57:18,917 INFO L93 Difference]: Finished difference Result 218 states and 519 transitions. [2020-10-15 19:57:18,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 19:57:18,918 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:57:18,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:57:18,919 INFO L225 Difference]: With dead ends: 218 [2020-10-15 19:57:18,919 INFO L226 Difference]: Without dead ends: 216 [2020-10-15 19:57:18,920 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2020-10-15 19:57:18,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-15 19:57:18,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 156. [2020-10-15 19:57:18,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-15 19:57:18,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-10-15 19:57:18,922 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-10-15 19:57:18,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:57:18,923 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-10-15 19:57:18,923 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:57:18,923 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-10-15 19:57:18,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:57:18,923 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:57:18,923 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:57:19,123 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:19,124 INFO L429 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:57:19,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:57:19,125 INFO L82 PathProgramCache]: Analyzing trace with hash -166114155, now seen corresponding path program 122 times [2020-10-15 19:57:19,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:57:19,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212311644] [2020-10-15 19:57:19,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:57:19,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:57:19,242 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:19,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212311644] [2020-10-15 19:57:19,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401789956] [2020-10-15 19:57:19,242 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 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:19,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:57:19,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:57:19,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:57:19,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:57:19,457 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:19,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:57:19,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:57:19,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844263627] [2020-10-15 19:57:19,458 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:57:19,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:57:19,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:57:19,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:57:19,459 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-10-15 19:57:19,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:57:19,765 INFO L93 Difference]: Finished difference Result 206 states and 492 transitions. [2020-10-15 19:57:19,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 19:57:19,766 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:57:19,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:57:19,767 INFO L225 Difference]: With dead ends: 206 [2020-10-15 19:57:19,767 INFO L226 Difference]: Without dead ends: 204 [2020-10-15 19:57:19,768 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2020-10-15 19:57:19,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-10-15 19:57:19,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 154. [2020-10-15 19:57:19,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-15 19:57:19,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 389 transitions. [2020-10-15 19:57:19,770 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 389 transitions. Word has length 14 [2020-10-15 19:57:19,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:57:19,770 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 389 transitions. [2020-10-15 19:57:19,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:57:19,771 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 389 transitions. [2020-10-15 19:57:19,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:57:19,771 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:57:19,771 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:57:19,971 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2020-10-15 19:57:19,972 INFO L429 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:57:19,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:57:19,972 INFO L82 PathProgramCache]: Analyzing trace with hash 691806102, now seen corresponding path program 123 times [2020-10-15 19:57:19,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:57:19,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283457935] [2020-10-15 19:57:19,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:57:19,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:57:20,097 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:20,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283457935] [2020-10-15 19:57:20,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181142644] [2020-10-15 19:57:20,098 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 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:20,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-15 19:57:20,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:57:20,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:57:20,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:57:20,312 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:20,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:57:20,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:57:20,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405583083] [2020-10-15 19:57:20,313 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:57:20,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:57:20,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:57:20,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:57:20,314 INFO L87 Difference]: Start difference. First operand 154 states and 389 transitions. Second operand 17 states. [2020-10-15 19:57:20,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:57:20,629 INFO L93 Difference]: Finished difference Result 207 states and 495 transitions. [2020-10-15 19:57:20,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 19:57:20,630 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:57:20,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:57:20,631 INFO L225 Difference]: With dead ends: 207 [2020-10-15 19:57:20,631 INFO L226 Difference]: Without dead ends: 205 [2020-10-15 19:57:20,631 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2020-10-15 19:57:20,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-10-15 19:57:20,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 159. [2020-10-15 19:57:20,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-15 19:57:20,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 403 transitions. [2020-10-15 19:57:20,635 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 403 transitions. Word has length 14 [2020-10-15 19:57:20,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:57:20,636 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 403 transitions. [2020-10-15 19:57:20,636 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:57:20,636 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 403 transitions. [2020-10-15 19:57:20,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:57:20,636 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:57:20,636 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:57:20,845 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2020-10-15 19:57:20,845 INFO L429 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:57:20,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:57:20,846 INFO L82 PathProgramCache]: Analyzing trace with hash 691807063, now seen corresponding path program 124 times [2020-10-15 19:57:20,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:57:20,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966820634] [2020-10-15 19:57:20,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:57:20,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:57:20,974 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:20,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966820634] [2020-10-15 19:57:20,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355930605] [2020-10-15 19:57:20,974 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 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:21,014 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:57:21,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:57:21,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:57:21,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:57:21,200 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:21,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:57:21,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:57:21,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965392918] [2020-10-15 19:57:21,201 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:57:21,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:57:21,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:57:21,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:57:21,202 INFO L87 Difference]: Start difference. First operand 159 states and 403 transitions. Second operand 17 states. [2020-10-15 19:57:21,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:57:21,550 INFO L93 Difference]: Finished difference Result 217 states and 516 transitions. [2020-10-15 19:57:21,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 19:57:21,551 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:57:21,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:57:21,552 INFO L225 Difference]: With dead ends: 217 [2020-10-15 19:57:21,553 INFO L226 Difference]: Without dead ends: 215 [2020-10-15 19:57:21,553 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=176, Invalid=376, Unknown=0, NotChecked=0, Total=552 [2020-10-15 19:57:21,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-15 19:57:21,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 158. [2020-10-15 19:57:21,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-15 19:57:21,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 400 transitions. [2020-10-15 19:57:21,557 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 400 transitions. Word has length 14 [2020-10-15 19:57:21,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:57:21,557 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 400 transitions. [2020-10-15 19:57:21,557 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:57:21,557 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 400 transitions. [2020-10-15 19:57:21,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:57:21,557 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:57:21,557 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:57:21,758 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2020-10-15 19:57:21,758 INFO L429 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:57:21,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:57:21,759 INFO L82 PathProgramCache]: Analyzing trace with hash 691835893, now seen corresponding path program 125 times [2020-10-15 19:57:21,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:57:21,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527311090] [2020-10-15 19:57:21,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:57:21,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:57:21,898 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:21,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527311090] [2020-10-15 19:57:21,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324544882] [2020-10-15 19:57:21,899 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 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:21,940 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 19:57:21,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:57:21,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:57:21,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:57:22,212 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:22,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:57:22,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:57:22,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244082119] [2020-10-15 19:57:22,213 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:57:22,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:57:22,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:57:22,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:57:22,214 INFO L87 Difference]: Start difference. First operand 158 states and 400 transitions. Second operand 17 states. [2020-10-15 19:57:22,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:57:22,638 INFO L93 Difference]: Finished difference Result 223 states and 528 transitions. [2020-10-15 19:57:22,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 19:57:22,640 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:57:22,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:57:22,640 INFO L225 Difference]: With dead ends: 223 [2020-10-15 19:57:22,640 INFO L226 Difference]: Without dead ends: 221 [2020-10-15 19:57:22,641 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=197, Invalid=403, Unknown=0, NotChecked=0, Total=600 [2020-10-15 19:57:22,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-10-15 19:57:22,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 162. [2020-10-15 19:57:22,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-15 19:57:22,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 411 transitions. [2020-10-15 19:57:22,645 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 411 transitions. Word has length 14 [2020-10-15 19:57:22,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:57:22,645 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 411 transitions. [2020-10-15 19:57:22,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:57:22,645 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 411 transitions. [2020-10-15 19:57:22,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:57:22,645 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:57:22,646 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:57:22,854 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2020-10-15 19:57:22,854 INFO L429 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:57:22,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:57:22,855 INFO L82 PathProgramCache]: Analyzing trace with hash 692730584, now seen corresponding path program 126 times [2020-10-15 19:57:22,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:57:22,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879569126] [2020-10-15 19:57:22,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:57:22,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:57:22,983 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:22,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879569126] [2020-10-15 19:57:22,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440401173] [2020-10-15 19:57:22,983 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 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:23,032 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 19:57:23,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:57:23,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:57:23,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:57:23,217 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:23,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:57:23,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:57:23,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597024383] [2020-10-15 19:57:23,218 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:57:23,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:57:23,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:57:23,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:57:23,219 INFO L87 Difference]: Start difference. First operand 162 states and 411 transitions. Second operand 17 states. [2020-10-15 19:57:23,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:57:23,548 INFO L93 Difference]: Finished difference Result 225 states and 531 transitions. [2020-10-15 19:57:23,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 19:57:23,549 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:57:23,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:57:23,549 INFO L225 Difference]: With dead ends: 225 [2020-10-15 19:57:23,549 INFO L226 Difference]: Without dead ends: 223 [2020-10-15 19:57:23,549 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2020-10-15 19:57:23,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-10-15 19:57:23,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 161. [2020-10-15 19:57:23,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-15 19:57:23,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 407 transitions. [2020-10-15 19:57:23,552 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 407 transitions. Word has length 14 [2020-10-15 19:57:23,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:57:23,552 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 407 transitions. [2020-10-15 19:57:23,553 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:57:23,553 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 407 transitions. [2020-10-15 19:57:23,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:57:23,553 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:57:23,553 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:57:23,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:23,754 INFO L429 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:57:23,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:57:23,754 INFO L82 PathProgramCache]: Analyzing trace with hash 720435253, now seen corresponding path program 127 times [2020-10-15 19:57:23,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:57:23,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056957433] [2020-10-15 19:57:23,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:57:23,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:57:23,886 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:23,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056957433] [2020-10-15 19:57:23,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069446892] [2020-10-15 19:57:23,886 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 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:23,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:57:23,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:57:23,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:57:24,134 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:24,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:57:24,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:57:24,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305742853] [2020-10-15 19:57:24,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:57:24,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:57:24,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:57:24,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:57:24,136 INFO L87 Difference]: Start difference. First operand 161 states and 407 transitions. Second operand 17 states. [2020-10-15 19:57:24,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:57:24,479 INFO L93 Difference]: Finished difference Result 214 states and 509 transitions. [2020-10-15 19:57:24,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 19:57:24,479 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:57:24,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:57:24,480 INFO L225 Difference]: With dead ends: 214 [2020-10-15 19:57:24,480 INFO L226 Difference]: Without dead ends: 212 [2020-10-15 19:57:24,480 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=183, Invalid=369, Unknown=0, NotChecked=0, Total=552 [2020-10-15 19:57:24,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-10-15 19:57:24,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 160. [2020-10-15 19:57:24,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-15 19:57:24,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 404 transitions. [2020-10-15 19:57:24,485 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 404 transitions. Word has length 14 [2020-10-15 19:57:24,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:57:24,485 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 404 transitions. [2020-10-15 19:57:24,485 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:57:24,485 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 404 transitions. [2020-10-15 19:57:24,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:57:24,485 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:57:24,485 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:57:24,686 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:24,686 INFO L429 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:57:24,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:57:24,687 INFO L82 PathProgramCache]: Analyzing trace with hash 721388565, now seen corresponding path program 128 times [2020-10-15 19:57:24,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:57:24,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395285638] [2020-10-15 19:57:24,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:57:24,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:57:24,851 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:24,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395285638] [2020-10-15 19:57:24,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990229883] [2020-10-15 19:57:24,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:24,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:57:24,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:57:24,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:57:24,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:57:25,065 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:25,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:57:25,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:57:25,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405716098] [2020-10-15 19:57:25,066 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:57:25,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:57:25,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:57:25,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:57:25,071 INFO L87 Difference]: Start difference. First operand 160 states and 404 transitions. Second operand 17 states. [2020-10-15 19:57:25,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:57:25,320 INFO L93 Difference]: Finished difference Result 203 states and 486 transitions. [2020-10-15 19:57:25,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 19:57:25,322 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:57:25,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:57:25,322 INFO L225 Difference]: With dead ends: 203 [2020-10-15 19:57:25,323 INFO L226 Difference]: Without dead ends: 201 [2020-10-15 19:57:25,323 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2020-10-15 19:57:25,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-10-15 19:57:25,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 158. [2020-10-15 19:57:25,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-15 19:57:25,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 397 transitions. [2020-10-15 19:57:25,326 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 397 transitions. Word has length 14 [2020-10-15 19:57:25,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:57:25,326 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 397 transitions. [2020-10-15 19:57:25,326 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:57:25,326 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 397 transitions. [2020-10-15 19:57:25,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:57:25,327 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:57:25,327 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:57:25,527 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2020-10-15 19:57:25,527 INFO L429 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:57:25,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:57:25,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1998481017, now seen corresponding path program 129 times [2020-10-15 19:57:25,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:57:25,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110647956] [2020-10-15 19:57:25,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:57:25,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:57:25,717 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:25,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110647956] [2020-10-15 19:57:25,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271359852] [2020-10-15 19:57:25,718 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 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:25,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 19:57:25,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:57:25,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:57:25,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:57:25,957 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:25,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:57:25,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:57:25,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487436716] [2020-10-15 19:57:25,958 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:57:25,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:57:25,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:57:25,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:57:25,959 INFO L87 Difference]: Start difference. First operand 158 states and 397 transitions. Second operand 17 states. [2020-10-15 19:57:26,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:57:26,040 INFO L93 Difference]: Finished difference Result 212 states and 504 transitions. [2020-10-15 19:57:26,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 19:57:26,041 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:57:26,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:57:26,042 INFO L225 Difference]: With dead ends: 212 [2020-10-15 19:57:26,042 INFO L226 Difference]: Without dead ends: 210 [2020-10-15 19:57:26,043 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-10-15 19:57:26,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-10-15 19:57:26,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 166. [2020-10-15 19:57:26,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-15 19:57:26,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 421 transitions. [2020-10-15 19:57:26,046 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 421 transitions. Word has length 14 [2020-10-15 19:57:26,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:57:26,046 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 421 transitions. [2020-10-15 19:57:26,046 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:57:26,046 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 421 transitions. [2020-10-15 19:57:26,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:57:26,046 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:57:26,047 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:57:26,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:26,254 INFO L429 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:57:26,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:57:26,255 INFO L82 PathProgramCache]: Analyzing trace with hash -1998480056, now seen corresponding path program 130 times [2020-10-15 19:57:26,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:57:26,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327924213] [2020-10-15 19:57:26,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:57:26,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:57:26,421 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:26,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327924213] [2020-10-15 19:57:26,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407433952] [2020-10-15 19:57:26,422 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 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:26,478 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:57:26,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:57:26,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:57:26,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:57:26,682 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:26,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:57:26,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:57:26,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135909230] [2020-10-15 19:57:26,683 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:57:26,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:57:26,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:57:26,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:57:26,684 INFO L87 Difference]: Start difference. First operand 166 states and 421 transitions. Second operand 17 states. [2020-10-15 19:57:26,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:57:26,987 INFO L93 Difference]: Finished difference Result 217 states and 513 transitions. [2020-10-15 19:57:26,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 19:57:26,988 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:57:26,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:57:26,988 INFO L225 Difference]: With dead ends: 217 [2020-10-15 19:57:26,988 INFO L226 Difference]: Without dead ends: 215 [2020-10-15 19:57:26,989 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-10-15 19:57:26,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-15 19:57:26,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 164. [2020-10-15 19:57:26,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-15 19:57:26,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 415 transitions. [2020-10-15 19:57:26,992 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 415 transitions. Word has length 14 [2020-10-15 19:57:26,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:57:26,992 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 415 transitions. [2020-10-15 19:57:26,992 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:57:26,992 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 415 transitions. [2020-10-15 19:57:26,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:57:26,992 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:57:26,993 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:57:27,193 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:27,193 INFO L429 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:57:27,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:57:27,194 INFO L82 PathProgramCache]: Analyzing trace with hash -1998451226, now seen corresponding path program 131 times [2020-10-15 19:57:27,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:57:27,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088545784] [2020-10-15 19:57:27,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:57:27,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:57:27,391 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:27,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088545784] [2020-10-15 19:57:27,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603470102] [2020-10-15 19:57:27,392 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 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:27,455 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 19:57:27,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:57:27,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:57:27,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:57:28,825 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:28,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:57:28,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:57:28,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621937558] [2020-10-15 19:57:28,825 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:57:28,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:57:28,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:57:28,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:57:28,826 INFO L87 Difference]: Start difference. First operand 164 states and 415 transitions. Second operand 17 states. [2020-10-15 19:57:29,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:57:29,190 INFO L93 Difference]: Finished difference Result 227 states and 533 transitions. [2020-10-15 19:57:29,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 19:57:29,191 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:57:29,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:57:29,191 INFO L225 Difference]: With dead ends: 227 [2020-10-15 19:57:29,191 INFO L226 Difference]: Without dead ends: 225 [2020-10-15 19:57:29,192 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2020-10-15 19:57:29,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-10-15 19:57:29,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 162. [2020-10-15 19:57:29,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-15 19:57:29,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 409 transitions. [2020-10-15 19:57:29,195 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 409 transitions. Word has length 14 [2020-10-15 19:57:29,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:57:29,195 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 409 transitions. [2020-10-15 19:57:29,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:57:29,196 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 409 transitions. [2020-10-15 19:57:29,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:57:29,196 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:57:29,196 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:57:29,398 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:29,399 INFO L429 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:57:29,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:57:29,399 INFO L82 PathProgramCache]: Analyzing trace with hash -1997557496, now seen corresponding path program 132 times [2020-10-15 19:57:29,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:57:29,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786180144] [2020-10-15 19:57:29,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:57:29,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:57:29,539 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:29,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786180144] [2020-10-15 19:57:29,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760705754] [2020-10-15 19:57:29,540 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 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:29,579 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 19:57:29,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:57:29,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:57:29,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:57:29,816 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:29,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:57:29,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:57:29,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104014441] [2020-10-15 19:57:29,817 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:57:29,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:57:29,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:57:29,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:57:29,817 INFO L87 Difference]: Start difference. First operand 162 states and 409 transitions. Second operand 17 states. [2020-10-15 19:57:30,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:57:30,261 INFO L93 Difference]: Finished difference Result 227 states and 533 transitions. [2020-10-15 19:57:30,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 19:57:30,262 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:57:30,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:57:30,262 INFO L225 Difference]: With dead ends: 227 [2020-10-15 19:57:30,263 INFO L226 Difference]: Without dead ends: 225 [2020-10-15 19:57:30,263 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=208, Invalid=442, Unknown=0, NotChecked=0, Total=650 [2020-10-15 19:57:30,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-10-15 19:57:30,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 164. [2020-10-15 19:57:30,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-15 19:57:30,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 415 transitions. [2020-10-15 19:57:30,266 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 415 transitions. Word has length 14 [2020-10-15 19:57:30,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:57:30,266 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 415 transitions. [2020-10-15 19:57:30,266 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:57:30,266 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 415 transitions. [2020-10-15 19:57:30,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:57:30,267 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:57:30,267 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:57:30,468 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable165 [2020-10-15 19:57:30,468 INFO L429 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:57:30,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:57:30,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1997556535, now seen corresponding path program 133 times [2020-10-15 19:57:30,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:57:30,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366970090] [2020-10-15 19:57:30,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:57:30,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:57:30,608 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:30,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366970090] [2020-10-15 19:57:30,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647047729] [2020-10-15 19:57:30,609 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:30,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:57:30,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:57:30,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:57:34,646 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:34,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:57:34,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:57:34,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789837190] [2020-10-15 19:57:34,647 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:57:34,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:57:34,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:57:34,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=200, Unknown=1, NotChecked=0, Total=272 [2020-10-15 19:57:34,648 INFO L87 Difference]: Start difference. First operand 164 states and 415 transitions. Second operand 17 states. [2020-10-15 19:57:38,888 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-15 19:57:39,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:57:39,261 INFO L93 Difference]: Finished difference Result 237 states and 553 transitions. [2020-10-15 19:57:39,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 19:57:39,262 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:57:39,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:57:39,262 INFO L225 Difference]: With dead ends: 237 [2020-10-15 19:57:39,262 INFO L226 Difference]: Without dead ends: 235 [2020-10-15 19:57:39,262 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=205, Invalid=444, Unknown=1, NotChecked=0, Total=650 [2020-10-15 19:57:39,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-10-15 19:57:39,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 163. [2020-10-15 19:57:39,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 19:57:39,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-10-15 19:57:39,266 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-10-15 19:57:39,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:57:39,266 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-10-15 19:57:39,266 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:57:39,266 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-10-15 19:57:39,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:57:39,267 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:57:39,267 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:57:39,467 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2020-10-15 19:57:39,468 INFO L429 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:57:39,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:57:39,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1997527705, now seen corresponding path program 134 times [2020-10-15 19:57:39,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:57:39,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098795273] [2020-10-15 19:57:39,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:57:39,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:57:39,625 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:39,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098795273] [2020-10-15 19:57:39,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435451740] [2020-10-15 19:57:39,626 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 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:39,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:57:39,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:57:39,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:57:39,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:57:40,024 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:40,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:57:40,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:57:40,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121236451] [2020-10-15 19:57:40,025 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:57:40,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:57:40,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:57:40,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:57:40,026 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-10-15 19:57:40,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:57:40,526 INFO L93 Difference]: Finished difference Result 229 states and 539 transitions. [2020-10-15 19:57:40,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 19:57:40,527 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:57:40,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:57:40,527 INFO L225 Difference]: With dead ends: 229 [2020-10-15 19:57:40,527 INFO L226 Difference]: Without dead ends: 227 [2020-10-15 19:57:40,528 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=210, Invalid=440, Unknown=0, NotChecked=0, Total=650 [2020-10-15 19:57:40,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-15 19:57:40,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 160. [2020-10-15 19:57:40,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-15 19:57:40,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 403 transitions. [2020-10-15 19:57:40,531 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 403 transitions. Word has length 14 [2020-10-15 19:57:40,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:57:40,531 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 403 transitions. [2020-10-15 19:57:40,531 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:57:40,532 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 403 transitions. [2020-10-15 19:57:40,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:57:40,532 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:57:40,532 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:57:40,732 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2020-10-15 19:57:40,733 INFO L429 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:57:40,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:57:40,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1969851866, now seen corresponding path program 135 times [2020-10-15 19:57:40,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:57:40,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131442278] [2020-10-15 19:57:40,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:57:40,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:57:40,858 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:40,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131442278] [2020-10-15 19:57:40,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059582571] [2020-10-15 19:57:40,859 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 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:40,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 19:57:40,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:57:40,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:57:40,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:57:41,085 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:41,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:57:41,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:57:41,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129938277] [2020-10-15 19:57:41,087 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:57:41,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:57:41,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:57:41,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:57:41,087 INFO L87 Difference]: Start difference. First operand 160 states and 403 transitions. Second operand 17 states. [2020-10-15 19:57:41,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:57:41,642 INFO L93 Difference]: Finished difference Result 225 states and 529 transitions. [2020-10-15 19:57:41,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 19:57:41,644 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:57:41,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:57:41,645 INFO L225 Difference]: With dead ends: 225 [2020-10-15 19:57:41,645 INFO L226 Difference]: Without dead ends: 223 [2020-10-15 19:57:41,646 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=250, Invalid=562, Unknown=0, NotChecked=0, Total=812 [2020-10-15 19:57:41,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-10-15 19:57:41,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 163. [2020-10-15 19:57:41,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 19:57:41,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-10-15 19:57:41,651 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-10-15 19:57:41,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:57:41,652 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-10-15 19:57:41,652 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:57:41,652 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-10-15 19:57:41,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:57:41,653 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:57:41,653 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:57:41,865 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2020-10-15 19:57:41,866 INFO L429 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:57:41,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:57:41,866 INFO L82 PathProgramCache]: Analyzing trace with hash -1969850905, now seen corresponding path program 136 times [2020-10-15 19:57:41,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:57:41,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102587178] [2020-10-15 19:57:41,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:57:41,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:57:42,050 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:42,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102587178] [2020-10-15 19:57:42,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233336502] [2020-10-15 19:57:42,051 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 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:42,116 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:57:42,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:57:42,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:57:42,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:57:42,385 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:42,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:57:42,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:57:42,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102617806] [2020-10-15 19:57:42,386 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:57:42,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:57:42,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:57:42,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:57:42,387 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-10-15 19:57:42,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:57:42,907 INFO L93 Difference]: Finished difference Result 239 states and 557 transitions. [2020-10-15 19:57:42,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 19:57:42,908 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:57:42,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:57:42,909 INFO L225 Difference]: With dead ends: 239 [2020-10-15 19:57:42,909 INFO L226 Difference]: Without dead ends: 237 [2020-10-15 19:57:42,909 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=248, Invalid=564, Unknown=0, NotChecked=0, Total=812 [2020-10-15 19:57:42,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-10-15 19:57:42,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 163. [2020-10-15 19:57:42,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 19:57:42,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-10-15 19:57:42,912 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-10-15 19:57:42,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:57:42,912 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-10-15 19:57:42,912 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:57:42,912 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-10-15 19:57:42,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:57:42,913 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:57:42,913 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:57:43,113 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2020-10-15 19:57:43,114 INFO L429 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:57:43,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:57:43,114 INFO L82 PathProgramCache]: Analyzing trace with hash -1969822075, now seen corresponding path program 137 times [2020-10-15 19:57:43,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:57:43,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228515422] [2020-10-15 19:57:43,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:57:43,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:57:43,243 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:43,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228515422] [2020-10-15 19:57:43,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666910658] [2020-10-15 19:57:43,244 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 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:43,284 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 19:57:43,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:57:43,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:57:43,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:57:43,481 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:43,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:57:43,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:57:43,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149456348] [2020-10-15 19:57:43,482 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:57:43,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:57:43,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:57:43,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:57:43,483 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-10-15 19:57:43,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:57:43,906 INFO L93 Difference]: Finished difference Result 234 states and 550 transitions. [2020-10-15 19:57:43,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 19:57:43,907 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:57:43,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:57:43,907 INFO L225 Difference]: With dead ends: 234 [2020-10-15 19:57:43,908 INFO L226 Difference]: Without dead ends: 232 [2020-10-15 19:57:43,908 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=222, Invalid=480, Unknown=0, NotChecked=0, Total=702 [2020-10-15 19:57:43,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-10-15 19:57:43,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 163. [2020-10-15 19:57:43,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 19:57:43,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-10-15 19:57:43,910 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-10-15 19:57:43,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:57:43,910 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-10-15 19:57:43,910 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:57:43,911 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-10-15 19:57:43,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:57:43,911 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:57:43,911 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:57:44,119 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable170 [2020-10-15 19:57:44,120 INFO L429 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:57:44,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:57:44,120 INFO L82 PathProgramCache]: Analyzing trace with hash -1968897593, now seen corresponding path program 138 times [2020-10-15 19:57:44,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:57:44,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828380679] [2020-10-15 19:57:44,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:57:44,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:57:44,241 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:44,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828380679] [2020-10-15 19:57:44,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270808168] [2020-10-15 19:57:44,242 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 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:44,280 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 19:57:44,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:57:44,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:57:44,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:57:44,466 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:44,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:57:44,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:57:44,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608955491] [2020-10-15 19:57:44,467 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:57:44,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:57:44,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:57:44,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:57:44,468 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-10-15 19:57:44,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:57:44,825 INFO L93 Difference]: Finished difference Result 218 states and 515 transitions. [2020-10-15 19:57:44,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 19:57:44,825 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:57:44,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:57:44,826 INFO L225 Difference]: With dead ends: 218 [2020-10-15 19:57:44,826 INFO L226 Difference]: Without dead ends: 216 [2020-10-15 19:57:44,826 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2020-10-15 19:57:44,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-15 19:57:44,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 159. [2020-10-15 19:57:44,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-15 19:57:44,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 399 transitions. [2020-10-15 19:57:44,830 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 399 transitions. Word has length 14 [2020-10-15 19:57:44,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:57:44,830 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 399 transitions. [2020-10-15 19:57:44,830 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:57:44,830 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 399 transitions. [2020-10-15 19:57:44,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:57:44,830 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:57:44,830 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:57:45,031 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:45,031 INFO L429 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:57:45,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:57:45,032 INFO L82 PathProgramCache]: Analyzing trace with hash 575763989, now seen corresponding path program 139 times [2020-10-15 19:57:45,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:57:45,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759240579] [2020-10-15 19:57:45,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:57:45,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:57:45,206 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:45,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759240579] [2020-10-15 19:57:45,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996950166] [2020-10-15 19:57:45,207 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 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:45,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:57:45,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:57:45,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:57:45,444 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:45,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:57:45,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:57:45,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767060503] [2020-10-15 19:57:45,445 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:57:45,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:57:45,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:57:45,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:57:45,446 INFO L87 Difference]: Start difference. First operand 159 states and 399 transitions. Second operand 17 states. [2020-10-15 19:57:45,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:57:45,570 INFO L93 Difference]: Finished difference Result 208 states and 495 transitions. [2020-10-15 19:57:45,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 19:57:45,571 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:57:45,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:57:45,572 INFO L225 Difference]: With dead ends: 208 [2020-10-15 19:57:45,572 INFO L226 Difference]: Without dead ends: 206 [2020-10-15 19:57:45,572 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-10-15 19:57:45,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-10-15 19:57:45,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 165. [2020-10-15 19:57:45,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-15 19:57:45,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 417 transitions. [2020-10-15 19:57:45,575 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 417 transitions. Word has length 14 [2020-10-15 19:57:45,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:57:45,575 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 417 transitions. [2020-10-15 19:57:45,575 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:57:45,575 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 417 transitions. [2020-10-15 19:57:45,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:57:45,576 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:57:45,576 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:57:45,776 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:45,777 INFO L429 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:57:45,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:57:45,777 INFO L82 PathProgramCache]: Analyzing trace with hash 575764950, now seen corresponding path program 140 times [2020-10-15 19:57:45,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:57:45,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994876416] [2020-10-15 19:57:45,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:57:45,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:57:45,934 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:45,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994876416] [2020-10-15 19:57:45,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699868369] [2020-10-15 19:57:45,934 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 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:45,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:57:45,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:57:45,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:57:45,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:57:46,157 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:46,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:57:46,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:57:46,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418624225] [2020-10-15 19:57:46,158 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:57:46,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:57:46,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:57:46,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:57:46,159 INFO L87 Difference]: Start difference. First operand 165 states and 417 transitions. Second operand 17 states. [2020-10-15 19:57:46,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:57:46,463 INFO L93 Difference]: Finished difference Result 229 states and 536 transitions. [2020-10-15 19:57:46,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 19:57:46,463 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:57:46,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:57:46,464 INFO L225 Difference]: With dead ends: 229 [2020-10-15 19:57:46,464 INFO L226 Difference]: Without dead ends: 227 [2020-10-15 19:57:46,464 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=170, Invalid=382, Unknown=0, NotChecked=0, Total=552 [2020-10-15 19:57:46,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-15 19:57:46,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 163. [2020-10-15 19:57:46,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 19:57:46,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 411 transitions. [2020-10-15 19:57:46,468 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 411 transitions. Word has length 14 [2020-10-15 19:57:46,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:57:46,468 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 411 transitions. [2020-10-15 19:57:46,468 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:57:46,468 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 411 transitions. [2020-10-15 19:57:46,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:57:46,469 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:57:46,469 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:57:46,669 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:46,670 INFO L429 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:57:46,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:57:46,670 INFO L82 PathProgramCache]: Analyzing trace with hash 575793780, now seen corresponding path program 141 times [2020-10-15 19:57:46,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:57:46,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936310754] [2020-10-15 19:57:46,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:57:46,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:57:46,800 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:46,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936310754] [2020-10-15 19:57:46,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729504522] [2020-10-15 19:57:46,801 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 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:46,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 19:57:46,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:57:46,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:57:46,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:57:47,879 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:47,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:57:47,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:57:47,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255036879] [2020-10-15 19:57:47,880 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:57:47,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:57:47,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:57:47,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:57:47,880 INFO L87 Difference]: Start difference. First operand 163 states and 411 transitions. Second operand 17 states. [2020-10-15 19:57:48,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:57:48,293 INFO L93 Difference]: Finished difference Result 235 states and 548 transitions. [2020-10-15 19:57:48,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 19:57:48,294 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:57:48,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:57:48,295 INFO L225 Difference]: With dead ends: 235 [2020-10-15 19:57:48,295 INFO L226 Difference]: Without dead ends: 233 [2020-10-15 19:57:48,295 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2020-10-15 19:57:48,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-15 19:57:48,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 161. [2020-10-15 19:57:48,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-15 19:57:48,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 405 transitions. [2020-10-15 19:57:48,299 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 405 transitions. Word has length 14 [2020-10-15 19:57:48,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:57:48,299 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 405 transitions. [2020-10-15 19:57:48,299 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:57:48,299 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 405 transitions. [2020-10-15 19:57:48,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:57:48,299 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:57:48,300 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:57:48,500 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:48,500 INFO L429 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:57:48,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:57:48,501 INFO L82 PathProgramCache]: Analyzing trace with hash 576687510, now seen corresponding path program 142 times [2020-10-15 19:57:48,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:57:48,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068324234] [2020-10-15 19:57:48,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:57:48,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:57:48,631 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:48,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068324234] [2020-10-15 19:57:48,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217824136] [2020-10-15 19:57:48,632 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 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:48,671 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:57:48,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:57:48,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:57:48,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:57:48,930 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:48,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:57:48,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:57:48,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707960332] [2020-10-15 19:57:48,930 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:57:48,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:57:48,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:57:48,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:57:48,931 INFO L87 Difference]: Start difference. First operand 161 states and 405 transitions. Second operand 17 states. [2020-10-15 19:57:49,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:57:49,472 INFO L93 Difference]: Finished difference Result 233 states and 544 transitions. [2020-10-15 19:57:49,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 19:57:49,474 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:57:49,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:57:49,474 INFO L225 Difference]: With dead ends: 233 [2020-10-15 19:57:49,475 INFO L226 Difference]: Without dead ends: 231 [2020-10-15 19:57:49,475 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=216, Invalid=486, Unknown=0, NotChecked=0, Total=702 [2020-10-15 19:57:49,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-10-15 19:57:49,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 163. [2020-10-15 19:57:49,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 19:57:49,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 411 transitions. [2020-10-15 19:57:49,479 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 411 transitions. Word has length 14 [2020-10-15 19:57:49,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:57:49,479 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 411 transitions. [2020-10-15 19:57:49,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:57:49,488 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 411 transitions. [2020-10-15 19:57:49,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:57:49,488 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:57:49,488 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:57:49,699 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:49,699 INFO L429 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:57:49,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:57:49,700 INFO L82 PathProgramCache]: Analyzing trace with hash 576688471, now seen corresponding path program 143 times [2020-10-15 19:57:49,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:57:49,700 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067783878] [2020-10-15 19:57:49,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:57:49,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:57:49,826 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:49,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067783878] [2020-10-15 19:57:49,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659324944] [2020-10-15 19:57:49,827 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 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:49,865 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:57:49,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:57:49,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:57:49,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:57:54,030 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:54,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:57:54,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:57:54,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015898107] [2020-10-15 19:57:54,031 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:57:54,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:57:54,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:57:54,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=208, Unknown=1, NotChecked=0, Total=272 [2020-10-15 19:57:54,032 INFO L87 Difference]: Start difference. First operand 163 states and 411 transitions. Second operand 17 states. [2020-10-15 19:57:58,305 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-15 19:57:58,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:57:58,670 INFO L93 Difference]: Finished difference Result 241 states and 560 transitions. [2020-10-15 19:57:58,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 19:57:58,671 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:57:58,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:57:58,671 INFO L225 Difference]: With dead ends: 241 [2020-10-15 19:57:58,672 INFO L226 Difference]: Without dead ends: 239 [2020-10-15 19:57:58,672 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=211, Invalid=490, Unknown=1, NotChecked=0, Total=702 [2020-10-15 19:57:58,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-10-15 19:57:58,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 163. [2020-10-15 19:57:58,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 19:57:58,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 410 transitions. [2020-10-15 19:57:58,675 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 410 transitions. Word has length 14 [2020-10-15 19:57:58,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:57:58,675 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 410 transitions. [2020-10-15 19:57:58,675 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:57:58,676 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 410 transitions. [2020-10-15 19:57:58,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:57:58,676 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:57:58,676 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:57:58,876 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:58,877 INFO L429 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:57:58,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:57:58,877 INFO L82 PathProgramCache]: Analyzing trace with hash 576717301, now seen corresponding path program 144 times [2020-10-15 19:57:58,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:57:58,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134239627] [2020-10-15 19:57:58,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:57:58,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:57:59,003 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:59,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134239627] [2020-10-15 19:57:59,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491195600] [2020-10-15 19:57:59,004 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 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:59,043 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 19:57:59,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:57:59,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:57:59,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:57:59,328 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:59,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:57:59,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:57:59,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480799511] [2020-10-15 19:57:59,329 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:57:59,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:57:59,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:57:59,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:57:59,330 INFO L87 Difference]: Start difference. First operand 163 states and 410 transitions. Second operand 17 states. [2020-10-15 19:57:59,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:57:59,931 INFO L93 Difference]: Finished difference Result 233 states and 548 transitions. [2020-10-15 19:57:59,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 19:57:59,931 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:57:59,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:57:59,932 INFO L225 Difference]: With dead ends: 233 [2020-10-15 19:57:59,932 INFO L226 Difference]: Without dead ends: 231 [2020-10-15 19:57:59,932 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=215, Invalid=487, Unknown=0, NotChecked=0, Total=702 [2020-10-15 19:57:59,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-10-15 19:57:59,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 160. [2020-10-15 19:57:59,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-15 19:57:59,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 401 transitions. [2020-10-15 19:57:59,936 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 401 transitions. Word has length 14 [2020-10-15 19:57:59,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:57:59,936 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 401 transitions. [2020-10-15 19:57:59,936 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:57:59,936 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 401 transitions. [2020-10-15 19:57:59,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:57:59,936 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:57:59,936 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:58:00,137 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2020-10-15 19:58:00,137 INFO L429 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:58:00,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:58:00,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1212993479, now seen corresponding path program 145 times [2020-10-15 19:58:00,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:58:00,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046507851] [2020-10-15 19:58:00,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:58:00,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:58:00,300 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:58:00,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046507851] [2020-10-15 19:58:00,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125596863] [2020-10-15 19:58:00,300 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 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:58:00,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:58:00,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:58:00,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:58:00,533 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:58:00,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:58:00,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:58:00,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251347898] [2020-10-15 19:58:00,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:58:00,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:58:00,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:58:00,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:58:00,535 INFO L87 Difference]: Start difference. First operand 160 states and 401 transitions. Second operand 17 states. [2020-10-15 19:58:00,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:58:00,685 INFO L93 Difference]: Finished difference Result 204 states and 486 transitions. [2020-10-15 19:58:00,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 19:58:00,686 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:58:00,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:58:00,687 INFO L225 Difference]: With dead ends: 204 [2020-10-15 19:58:00,687 INFO L226 Difference]: Without dead ends: 202 [2020-10-15 19:58:00,687 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2020-10-15 19:58:00,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-10-15 19:58:00,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 164. [2020-10-15 19:58:00,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-15 19:58:00,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 413 transitions. [2020-10-15 19:58:00,690 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 413 transitions. Word has length 14 [2020-10-15 19:58:00,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:58:00,690 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 413 transitions. [2020-10-15 19:58:00,690 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:58:00,690 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 413 transitions. [2020-10-15 19:58:00,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:58:00,690 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:58:00,691 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:58:00,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:58:00,891 INFO L429 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:58:00,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:58:00,892 INFO L82 PathProgramCache]: Analyzing trace with hash 1212994440, now seen corresponding path program 146 times [2020-10-15 19:58:00,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:58:00,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029441302] [2020-10-15 19:58:00,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:58:00,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:58:01,027 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:58:01,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029441302] [2020-10-15 19:58:01,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971961370] [2020-10-15 19:58:01,028 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 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:58:01,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:58:01,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:58:01,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:58:01,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:58:01,277 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:58:01,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:58:01,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:58:01,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006046445] [2020-10-15 19:58:01,278 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:58:01,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:58:01,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:58:01,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:58:01,279 INFO L87 Difference]: Start difference. First operand 164 states and 413 transitions. Second operand 17 states. [2020-10-15 19:58:01,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:58:01,662 INFO L93 Difference]: Finished difference Result 225 states and 527 transitions. [2020-10-15 19:58:01,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 19:58:01,663 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:58:01,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:58:01,663 INFO L225 Difference]: With dead ends: 225 [2020-10-15 19:58:01,663 INFO L226 Difference]: Without dead ends: 223 [2020-10-15 19:58:01,664 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=185, Invalid=415, Unknown=0, NotChecked=0, Total=600 [2020-10-15 19:58:01,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-10-15 19:58:01,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 162. [2020-10-15 19:58:01,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-15 19:58:01,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 407 transitions. [2020-10-15 19:58:01,667 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 407 transitions. Word has length 14 [2020-10-15 19:58:01,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:58:01,667 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 407 transitions. [2020-10-15 19:58:01,667 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:58:01,667 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 407 transitions. [2020-10-15 19:58:01,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:58:01,668 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:58:01,668 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:58:01,868 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2020-10-15 19:58:01,868 INFO L429 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:58:01,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:58:01,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1213023270, now seen corresponding path program 147 times [2020-10-15 19:58:01,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:58:01,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904717206] [2020-10-15 19:58:01,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:58:01,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:58:02,001 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:58:02,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904717206] [2020-10-15 19:58:02,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249889210] [2020-10-15 19:58:02,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:58:02,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 19:58:02,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:58:02,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:58:02,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:58:02,306 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:58:02,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:58:02,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:58:02,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418301725] [2020-10-15 19:58:02,307 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:58:02,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:58:02,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:58:02,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:58:02,307 INFO L87 Difference]: Start difference. First operand 162 states and 407 transitions. Second operand 17 states. [2020-10-15 19:58:02,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:58:02,763 INFO L93 Difference]: Finished difference Result 231 states and 539 transitions. [2020-10-15 19:58:02,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 19:58:02,764 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:58:02,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:58:02,764 INFO L225 Difference]: With dead ends: 231 [2020-10-15 19:58:02,764 INFO L226 Difference]: Without dead ends: 229 [2020-10-15 19:58:02,765 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=200, Invalid=450, Unknown=0, NotChecked=0, Total=650 [2020-10-15 19:58:02,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-10-15 19:58:02,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 161. [2020-10-15 19:58:02,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-15 19:58:02,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 403 transitions. [2020-10-15 19:58:02,767 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 403 transitions. Word has length 14 [2020-10-15 19:58:02,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:58:02,767 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 403 transitions. [2020-10-15 19:58:02,767 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:58:02,767 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 403 transitions. [2020-10-15 19:58:02,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:58:02,768 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:58:02,768 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:58:02,968 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:58:02,968 INFO L429 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:58:02,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:58:02,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1233549269, now seen corresponding path program 148 times [2020-10-15 19:58:02,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:58:02,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123720390] [2020-10-15 19:58:02,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:58:02,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:58:03,108 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:58:03,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123720390] [2020-10-15 19:58:03,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365204486] [2020-10-15 19:58:03,109 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 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:58:03,154 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:58:03,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:58:03,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:58:03,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:58:03,346 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:58:03,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:58:03,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:58:03,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518673150] [2020-10-15 19:58:03,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:58:03,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:58:03,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:58:03,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:58:03,347 INFO L87 Difference]: Start difference. First operand 161 states and 403 transitions. Second operand 17 states. [2020-10-15 19:58:03,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:58:03,569 INFO L93 Difference]: Finished difference Result 200 states and 477 transitions. [2020-10-15 19:58:03,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 19:58:03,570 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:58:03,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:58:03,571 INFO L225 Difference]: With dead ends: 200 [2020-10-15 19:58:03,571 INFO L226 Difference]: Without dead ends: 198 [2020-10-15 19:58:03,571 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-10-15 19:58:03,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-10-15 19:58:03,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 163. [2020-10-15 19:58:03,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 19:58:03,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 409 transitions. [2020-10-15 19:58:03,575 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 409 transitions. Word has length 14 [2020-10-15 19:58:03,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:58:03,575 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 409 transitions. [2020-10-15 19:58:03,575 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:58:03,575 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 409 transitions. [2020-10-15 19:58:03,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:58:03,575 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:58:03,575 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:58:03,778 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:58:03,779 INFO L429 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:58:03,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:58:03,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1233550230, now seen corresponding path program 149 times [2020-10-15 19:58:03,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:58:03,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671845440] [2020-10-15 19:58:03,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:58:03,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:58:03,909 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:58:03,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671845440] [2020-10-15 19:58:03,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940003442] [2020-10-15 19:58:03,910 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 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:58:03,949 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 19:58:03,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:58:03,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:58:03,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:58:04,156 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:58:04,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:58:04,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:58:04,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811718220] [2020-10-15 19:58:04,157 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:58:04,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:58:04,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:58:04,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:58:04,158 INFO L87 Difference]: Start difference. First operand 163 states and 409 transitions. Second operand 17 states. [2020-10-15 19:58:04,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:58:04,566 INFO L93 Difference]: Finished difference Result 221 states and 518 transitions. [2020-10-15 19:58:04,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 19:58:04,567 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:58:04,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:58:04,568 INFO L225 Difference]: With dead ends: 221 [2020-10-15 19:58:04,568 INFO L226 Difference]: Without dead ends: 219 [2020-10-15 19:58:04,568 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=204, Invalid=446, Unknown=0, NotChecked=0, Total=650 [2020-10-15 19:58:04,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-10-15 19:58:04,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 162. [2020-10-15 19:58:04,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-15 19:58:04,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 405 transitions. [2020-10-15 19:58:04,572 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 405 transitions. Word has length 14 [2020-10-15 19:58:04,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:58:04,572 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 405 transitions. [2020-10-15 19:58:04,573 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:58:04,573 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 405 transitions. [2020-10-15 19:58:04,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:58:04,573 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:58:04,573 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:58:04,782 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2020-10-15 19:58:04,782 INFO L429 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:58:04,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:58:04,783 INFO L82 PathProgramCache]: Analyzing trace with hash 1234212359, now seen corresponding path program 150 times [2020-10-15 19:58:04,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:58:04,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483493083] [2020-10-15 19:58:04,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:58:04,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:58:04,908 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:58:04,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483493083] [2020-10-15 19:58:04,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942128207] [2020-10-15 19:58:04,909 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 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:58:04,972 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 19:58:04,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:58:04,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 19:58:04,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:58:05,002 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:58:05,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:58:05,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-15 19:58:05,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977854470] [2020-10-15 19:58:05,003 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 19:58:05,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:58:05,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 19:58:05,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2020-10-15 19:58:05,003 INFO L87 Difference]: Start difference. First operand 162 states and 405 transitions. Second operand 11 states. [2020-10-15 19:58:05,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:58:05,196 INFO L93 Difference]: Finished difference Result 201 states and 476 transitions. [2020-10-15 19:58:05,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 19:58:05,196 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-15 19:58:05,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:58:05,197 INFO L225 Difference]: With dead ends: 201 [2020-10-15 19:58:05,197 INFO L226 Difference]: Without dead ends: 199 [2020-10-15 19:58:05,198 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2020-10-15 19:58:05,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-15 19:58:05,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 166. [2020-10-15 19:58:05,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-15 19:58:05,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 411 transitions. [2020-10-15 19:58:05,201 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 411 transitions. Word has length 14 [2020-10-15 19:58:05,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:58:05,201 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 411 transitions. [2020-10-15 19:58:05,201 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 19:58:05,201 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 411 transitions. [2020-10-15 19:58:05,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:58:05,201 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:58:05,201 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:58:05,402 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:58:05,402 INFO L429 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:58:05,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:58:05,403 INFO L82 PathProgramCache]: Analyzing trace with hash 1234234679, now seen corresponding path program 151 times [2020-10-15 19:58:05,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:58:05,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212130470] [2020-10-15 19:58:05,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:58:05,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:58:05,520 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:58:05,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212130470] [2020-10-15 19:58:05,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875069179] [2020-10-15 19:58:05,520 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 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:58:05,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:58:05,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:58:05,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:58:05,745 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:58:05,792 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:58:05,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:58:05,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:58:05,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212608661] [2020-10-15 19:58:05,793 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:58:05,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:58:05,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:58:05,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:58:05,794 INFO L87 Difference]: Start difference. First operand 166 states and 411 transitions. Second operand 17 states. [2020-10-15 19:58:06,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:58:06,338 INFO L93 Difference]: Finished difference Result 226 states and 539 transitions. [2020-10-15 19:58:06,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 19:58:06,339 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:58:06,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:58:06,339 INFO L225 Difference]: With dead ends: 226 [2020-10-15 19:58:06,339 INFO L226 Difference]: Without dead ends: 221 [2020-10-15 19:58:06,340 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-10-15 19:58:06,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-10-15 19:58:06,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 164. [2020-10-15 19:58:06,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-15 19:58:06,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 404 transitions. [2020-10-15 19:58:06,343 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 404 transitions. Word has length 14 [2020-10-15 19:58:06,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:58:06,343 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 404 transitions. [2020-10-15 19:58:06,343 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:58:06,343 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 404 transitions. [2020-10-15 19:58:06,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:58:06,344 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:58:06,344 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:58:06,544 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,178 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:58:06,545 INFO L429 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:58:06,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:58:06,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1234242150, now seen corresponding path program 152 times [2020-10-15 19:58:06,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:58:06,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077163493] [2020-10-15 19:58:06,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:58:06,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:58:06,674 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:58:06,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077163493] [2020-10-15 19:58:06,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726858621] [2020-10-15 19:58:06,675 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 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:58:06,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:58:06,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:58:06,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:58:06,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:58:06,960 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:58:06,960 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:58:06,960 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:58:06,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701072718] [2020-10-15 19:58:06,961 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:58:06,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:58:06,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:58:06,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:58:06,962 INFO L87 Difference]: Start difference. First operand 164 states and 404 transitions. Second operand 17 states. [2020-10-15 19:58:07,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:58:07,430 INFO L93 Difference]: Finished difference Result 218 states and 517 transitions. [2020-10-15 19:58:07,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 19:58:07,431 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:58:07,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:58:07,432 INFO L225 Difference]: With dead ends: 218 [2020-10-15 19:58:07,432 INFO L226 Difference]: Without dead ends: 216 [2020-10-15 19:58:07,432 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=217, Invalid=485, Unknown=0, NotChecked=0, Total=702 [2020-10-15 19:58:07,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-15 19:58:07,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 166. [2020-10-15 19:58:07,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-15 19:58:07,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 411 transitions. [2020-10-15 19:58:07,434 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 411 transitions. Word has length 14 [2020-10-15 19:58:07,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:58:07,435 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 411 transitions. [2020-10-15 19:58:07,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:58:07,435 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 411 transitions. [2020-10-15 19:58:07,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:58:07,435 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:58:07,435 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:58:07,636 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:58:07,636 INFO L429 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:58:07,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:58:07,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1234263509, now seen corresponding path program 153 times [2020-10-15 19:58:07,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:58:07,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236559097] [2020-10-15 19:58:07,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:58:07,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:58:07,754 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:58:07,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236559097] [2020-10-15 19:58:07,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889082704] [2020-10-15 19:58:07,755 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 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:58:07,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 19:58:07,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:58:07,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:58:07,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:58:07,990 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:58:08,028 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:58:08,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:58:08,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:58:08,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247496568] [2020-10-15 19:58:08,029 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:58:08,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:58:08,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:58:08,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:58:08,029 INFO L87 Difference]: Start difference. First operand 166 states and 411 transitions. Second operand 17 states. [2020-10-15 19:58:08,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:58:08,793 INFO L93 Difference]: Finished difference Result 248 states and 590 transitions. [2020-10-15 19:58:08,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 19:58:08,794 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:58:08,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:58:08,795 INFO L225 Difference]: With dead ends: 248 [2020-10-15 19:58:08,795 INFO L226 Difference]: Without dead ends: 243 [2020-10-15 19:58:08,795 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=323, Invalid=669, Unknown=0, NotChecked=0, Total=992 [2020-10-15 19:58:08,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-10-15 19:58:08,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 166. [2020-10-15 19:58:08,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-15 19:58:08,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 411 transitions. [2020-10-15 19:58:08,799 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 411 transitions. Word has length 14 [2020-10-15 19:58:08,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:58:08,799 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 411 transitions. [2020-10-15 19:58:08,799 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:58:08,799 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 411 transitions. [2020-10-15 19:58:08,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:58:08,799 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:58:08,800 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:58:09,001 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:58:09,001 INFO L429 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:58:09,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:58:09,002 INFO L82 PathProgramCache]: Analyzing trace with hash 1234264470, now seen corresponding path program 154 times [2020-10-15 19:58:09,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:58:09,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344868838] [2020-10-15 19:58:09,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:58:09,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:58:09,130 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:58:09,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344868838] [2020-10-15 19:58:09,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361689743] [2020-10-15 19:58:09,131 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 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:58:09,169 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:58:09,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:58:09,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:58:09,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:58:09,382 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:58:09,411 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:58:09,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:58:09,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:58:09,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902856140] [2020-10-15 19:58:09,412 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:58:09,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:58:09,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:58:09,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:58:09,412 INFO L87 Difference]: Start difference. First operand 166 states and 411 transitions. Second operand 17 states. [2020-10-15 19:58:10,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:58:10,062 INFO L93 Difference]: Finished difference Result 238 states and 567 transitions. [2020-10-15 19:58:10,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 19:58:10,063 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:58:10,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:58:10,064 INFO L225 Difference]: With dead ends: 238 [2020-10-15 19:58:10,064 INFO L226 Difference]: Without dead ends: 233 [2020-10-15 19:58:10,064 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-10-15 19:58:10,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-15 19:58:10,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 162. [2020-10-15 19:58:10,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-15 19:58:10,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 397 transitions. [2020-10-15 19:58:10,067 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 397 transitions. Word has length 14 [2020-10-15 19:58:10,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:58:10,068 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 397 transitions. [2020-10-15 19:58:10,068 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:58:10,068 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 397 transitions. [2020-10-15 19:58:10,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:58:10,068 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:58:10,068 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:58:10,268 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:58:10,269 INFO L429 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:58:10,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:58:10,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1234472790, now seen corresponding path program 155 times [2020-10-15 19:58:10,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:58:10,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683816263] [2020-10-15 19:58:10,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:58:10,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:58:10,402 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:58:10,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683816263] [2020-10-15 19:58:10,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110991269] [2020-10-15 19:58:10,403 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 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:58:10,443 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 19:58:10,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:58:10,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:58:10,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:58:10,748 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:58:10,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:58:10,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:58:10,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593929080] [2020-10-15 19:58:10,750 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:58:10,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:58:10,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:58:10,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:58:10,750 INFO L87 Difference]: Start difference. First operand 162 states and 397 transitions. Second operand 17 states. [2020-10-15 19:58:11,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:58:11,588 INFO L93 Difference]: Finished difference Result 235 states and 547 transitions. [2020-10-15 19:58:11,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 19:58:11,595 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:58:11,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:58:11,596 INFO L225 Difference]: With dead ends: 235 [2020-10-15 19:58:11,596 INFO L226 Difference]: Without dead ends: 233 [2020-10-15 19:58:11,596 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=201, Invalid=501, Unknown=0, NotChecked=0, Total=702 [2020-10-15 19:58:11,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-15 19:58:11,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 164. [2020-10-15 19:58:11,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-15 19:58:11,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 404 transitions. [2020-10-15 19:58:11,600 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 404 transitions. Word has length 14 [2020-10-15 19:58:11,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:58:11,601 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 404 transitions. [2020-10-15 19:58:11,601 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:58:11,601 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 404 transitions. [2020-10-15 19:58:11,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:58:11,601 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:58:11,602 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:58:11,802 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:58:11,802 INFO L429 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:58:11,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:58:11,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1235135880, now seen corresponding path program 156 times [2020-10-15 19:58:11,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:58:11,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129361966] [2020-10-15 19:58:11,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:58:11,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:58:11,941 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:58:11,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129361966] [2020-10-15 19:58:11,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710002179] [2020-10-15 19:58:11,942 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 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:58:11,981 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 19:58:11,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:58:11,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:58:11,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:58:12,320 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:58:12,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:58:12,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:58:12,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128691123] [2020-10-15 19:58:12,321 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:58:12,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:58:12,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:58:12,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:58:12,322 INFO L87 Difference]: Start difference. First operand 164 states and 404 transitions. Second operand 17 states. [2020-10-15 19:58:13,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:58:13,128 INFO L93 Difference]: Finished difference Result 252 states and 594 transitions. [2020-10-15 19:58:13,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 19:58:13,130 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:58:13,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:58:13,130 INFO L225 Difference]: With dead ends: 252 [2020-10-15 19:58:13,131 INFO L226 Difference]: Without dead ends: 250 [2020-10-15 19:58:13,131 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=272, Invalid=598, Unknown=0, NotChecked=0, Total=870 [2020-10-15 19:58:13,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-10-15 19:58:13,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 166. [2020-10-15 19:58:13,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-15 19:58:13,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 411 transitions. [2020-10-15 19:58:13,135 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 411 transitions. Word has length 14 [2020-10-15 19:58:13,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:58:13,135 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 411 transitions. [2020-10-15 19:58:13,135 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:58:13,136 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 411 transitions. [2020-10-15 19:58:13,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:58:13,136 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:58:13,136 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:58:13,337 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2020-10-15 19:58:13,337 INFO L429 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:58:13,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:58:13,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1235157239, now seen corresponding path program 157 times [2020-10-15 19:58:13,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:58:13,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886193677] [2020-10-15 19:58:13,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:58:13,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:58:13,469 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:58:13,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886193677] [2020-10-15 19:58:13,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293588851] [2020-10-15 19:58:13,470 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 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:58:13,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:58:13,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:58:13,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:58:13,758 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:58:13,809 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:58:13,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:58:13,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:58:13,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149723968] [2020-10-15 19:58:13,810 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:58:13,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:58:13,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:58:13,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:58:13,811 INFO L87 Difference]: Start difference. First operand 166 states and 411 transitions. Second operand 17 states. [2020-10-15 19:58:14,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:58:14,840 INFO L93 Difference]: Finished difference Result 258 states and 617 transitions. [2020-10-15 19:58:14,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 19:58:14,841 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:58:14,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:58:14,842 INFO L225 Difference]: With dead ends: 258 [2020-10-15 19:58:14,842 INFO L226 Difference]: Without dead ends: 253 [2020-10-15 19:58:14,842 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=371, Invalid=751, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 19:58:14,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-10-15 19:58:14,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 167. [2020-10-15 19:58:14,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-15 19:58:14,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 416 transitions. [2020-10-15 19:58:14,846 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 416 transitions. Word has length 14 [2020-10-15 19:58:14,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:58:14,847 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 416 transitions. [2020-10-15 19:58:14,847 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:58:14,847 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 416 transitions. [2020-10-15 19:58:14,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:58:14,847 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:58:14,847 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:58:15,048 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2020-10-15 19:58:15,049 INFO L429 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:58:15,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:58:15,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1235158200, now seen corresponding path program 158 times [2020-10-15 19:58:15,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:58:15,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698895920] [2020-10-15 19:58:15,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:58:15,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:58:15,230 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:58:15,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698895920] [2020-10-15 19:58:15,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490668623] [2020-10-15 19:58:15,231 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 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:58:15,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:58:15,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:58:15,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:58:15,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:58:17,682 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:58:17,733 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:58:17,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:58:17,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:58:17,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275060673] [2020-10-15 19:58:17,734 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:58:17,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:58:17,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:58:17,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=185, Unknown=1, NotChecked=0, Total=272 [2020-10-15 19:58:17,735 INFO L87 Difference]: Start difference. First operand 167 states and 416 transitions. Second operand 17 states. [2020-10-15 19:58:22,064 WARN L193 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2020-10-15 19:58:26,395 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2020-10-15 19:58:29,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:58:29,146 INFO L93 Difference]: Finished difference Result 287 states and 685 transitions. [2020-10-15 19:58:29,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 19:58:29,147 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:58:29,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:58:29,148 INFO L225 Difference]: With dead ends: 287 [2020-10-15 19:58:29,148 INFO L226 Difference]: Without dead ends: 279 [2020-10-15 19:58:29,148 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=370, Invalid=819, Unknown=1, NotChecked=0, Total=1190 [2020-10-15 19:58:29,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2020-10-15 19:58:29,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 162. [2020-10-15 19:58:29,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-15 19:58:29,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 400 transitions. [2020-10-15 19:58:29,152 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 400 transitions. Word has length 14 [2020-10-15 19:58:29,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:58:29,153 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 400 transitions. [2020-10-15 19:58:29,153 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:58:29,153 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 400 transitions. [2020-10-15 19:58:29,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:58:29,153 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:58:29,154 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:58:29,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable191 [2020-10-15 19:58:29,357 INFO L429 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:58:29,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:58:29,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1235187030, now seen corresponding path program 159 times [2020-10-15 19:58:29,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:58:29,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063511422] [2020-10-15 19:58:29,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:58:29,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:58:29,498 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:58:29,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063511422] [2020-10-15 19:58:29,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775210422] [2020-10-15 19:58:29,499 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 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:58:29,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 19:58:29,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:58:29,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:58:29,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:58:29,792 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:58:29,793 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:58:31,392 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:58:31,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:58:31,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-10-15 19:58:31,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897220203] [2020-10-15 19:58:31,393 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 19:58:31,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:58:31,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 19:58:31,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=216, Unknown=1, NotChecked=0, Total=306 [2020-10-15 19:58:31,394 INFO L87 Difference]: Start difference. First operand 162 states and 400 transitions. Second operand 18 states. [2020-10-15 19:58:34,122 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 39 [2020-10-15 19:58:42,381 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 46 [2020-10-15 19:58:56,228 WARN L193 SmtUtils]: Spent 3.95 s on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-10-15 19:59:05,930 WARN L193 SmtUtils]: Spent 1.61 s on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2020-10-15 19:59:31,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:59:31,176 INFO L93 Difference]: Finished difference Result 283 states and 667 transitions. [2020-10-15 19:59:31,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 19:59:31,178 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-10-15 19:59:31,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:59:31,179 INFO L225 Difference]: With dead ends: 283 [2020-10-15 19:59:31,179 INFO L226 Difference]: Without dead ends: 278 [2020-10-15 19:59:31,179 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 31.2s TimeCoverageRelationStatistics Valid=391, Invalid=930, Unknown=11, NotChecked=0, Total=1332 [2020-10-15 19:59:31,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2020-10-15 19:59:31,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 160. [2020-10-15 19:59:31,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-15 19:59:31,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 390 transitions. [2020-10-15 19:59:31,183 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 390 transitions. Word has length 14 [2020-10-15 19:59:31,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:59:31,183 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 390 transitions. [2020-10-15 19:59:31,183 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 19:59:31,183 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 390 transitions. [2020-10-15 19:59:31,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:59:31,183 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:59:31,184 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:59:31,384 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:59:31,384 INFO L429 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:59:31,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:59:31,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1241622630, now seen corresponding path program 160 times [2020-10-15 19:59:31,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:59:31,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950463147] [2020-10-15 19:59:31,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:59:31,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:59:31,516 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:59:31,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950463147] [2020-10-15 19:59:31,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117845715] [2020-10-15 19:59:31,517 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 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:59:31,555 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:59:31,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:59:31,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:59:31,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:59:31,899 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:59:31,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:59:31,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:59:31,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328556828] [2020-10-15 19:59:31,900 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:59:31,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:59:31,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:59:31,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:59:31,901 INFO L87 Difference]: Start difference. First operand 160 states and 390 transitions. Second operand 17 states. [2020-10-15 19:59:32,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:59:32,749 INFO L93 Difference]: Finished difference Result 235 states and 543 transitions. [2020-10-15 19:59:32,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 19:59:32,751 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:59:32,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:59:32,751 INFO L225 Difference]: With dead ends: 235 [2020-10-15 19:59:32,751 INFO L226 Difference]: Without dead ends: 233 [2020-10-15 19:59:32,752 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=193, Invalid=509, Unknown=0, NotChecked=0, Total=702 [2020-10-15 19:59:32,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-15 19:59:32,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 163. [2020-10-15 19:59:32,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 19:59:32,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 401 transitions. [2020-10-15 19:59:32,755 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 401 transitions. Word has length 14 [2020-10-15 19:59:32,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:59:32,756 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 401 transitions. [2020-10-15 19:59:32,756 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:59:32,756 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 401 transitions. [2020-10-15 19:59:32,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:59:32,756 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:59:32,756 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:59:32,964 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:59:32,965 INFO L429 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:59:32,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:59:32,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1241623591, now seen corresponding path program 161 times [2020-10-15 19:59:32,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:59:32,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426614939] [2020-10-15 19:59:32,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:59:32,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:59:33,080 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:59:33,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426614939] [2020-10-15 19:59:33,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732180421] [2020-10-15 19:59:33,081 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:59:33,120 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:59:33,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:59:33,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:59:33,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:59:39,321 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:59:39,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:59:39,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:59:39,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214510252] [2020-10-15 19:59:39,321 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:59:39,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:59:39,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:59:39,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=212, Unknown=1, NotChecked=0, Total=272 [2020-10-15 19:59:39,322 INFO L87 Difference]: Start difference. First operand 163 states and 401 transitions. Second operand 17 states. [2020-10-15 19:59:43,706 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-15 19:59:50,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:59:50,186 INFO L93 Difference]: Finished difference Result 241 states and 556 transitions. [2020-10-15 19:59:50,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 19:59:50,187 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:59:50,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:59:50,187 INFO L225 Difference]: With dead ends: 241 [2020-10-15 19:59:50,188 INFO L226 Difference]: Without dead ends: 239 [2020-10-15 19:59:50,188 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=193, Invalid=508, Unknown=1, NotChecked=0, Total=702 [2020-10-15 19:59:50,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-10-15 19:59:50,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 163. [2020-10-15 19:59:50,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 19:59:50,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 400 transitions. [2020-10-15 19:59:50,191 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 400 transitions. Word has length 14 [2020-10-15 19:59:50,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:59:50,191 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 400 transitions. [2020-10-15 19:59:50,191 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:59:50,191 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 400 transitions. [2020-10-15 19:59:50,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:59:50,192 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:59:50,192 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:59:50,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable194 [2020-10-15 19:59:50,393 INFO L429 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:59:50,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:59:50,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1241652421, now seen corresponding path program 162 times [2020-10-15 19:59:50,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:59:50,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638159935] [2020-10-15 19:59:50,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:59:50,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:59:50,515 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:59:50,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638159935] [2020-10-15 19:59:50,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647034507] [2020-10-15 19:59:50,516 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:59:50,556 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 19:59:50,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:59:50,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:59:50,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:59:50,869 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:59:50,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:59:50,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:59:50,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405263364] [2020-10-15 19:59:50,870 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:59:50,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:59:50,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:59:50,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:59:50,870 INFO L87 Difference]: Start difference. First operand 163 states and 400 transitions. Second operand 17 states. [2020-10-15 19:59:51,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:59:51,438 INFO L93 Difference]: Finished difference Result 235 states and 546 transitions. [2020-10-15 19:59:51,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 19:59:51,439 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:59:51,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:59:51,439 INFO L225 Difference]: With dead ends: 235 [2020-10-15 19:59:51,439 INFO L226 Difference]: Without dead ends: 233 [2020-10-15 19:59:51,439 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=192, Invalid=510, Unknown=0, NotChecked=0, Total=702 [2020-10-15 19:59:51,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-15 19:59:51,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 162. [2020-10-15 19:59:51,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-15 19:59:51,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 397 transitions. [2020-10-15 19:59:51,443 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 397 transitions. Word has length 14 [2020-10-15 19:59:51,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:59:51,443 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 397 transitions. [2020-10-15 19:59:51,443 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:59:51,443 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 397 transitions. [2020-10-15 19:59:51,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:59:51,443 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:59:51,443 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:59:51,644 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:59:51,644 INFO L429 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:59:51,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:59:51,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1262178420, now seen corresponding path program 163 times [2020-10-15 19:59:51,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:59:51,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108056577] [2020-10-15 19:59:51,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:59:51,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:59:51,797 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:59:51,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108056577] [2020-10-15 19:59:51,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169659143] [2020-10-15 19:59:51,798 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:59:51,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:59:51,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:59:51,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:59:52,137 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:59:52,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:59:52,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:59:52,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932516324] [2020-10-15 19:59:52,139 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:59:52,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:59:52,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:59:52,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:59:52,140 INFO L87 Difference]: Start difference. First operand 162 states and 397 transitions. Second operand 17 states. [2020-10-15 19:59:53,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:59:53,055 INFO L93 Difference]: Finished difference Result 254 states and 587 transitions. [2020-10-15 19:59:53,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 19:59:53,057 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:59:53,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:59:53,057 INFO L225 Difference]: With dead ends: 254 [2020-10-15 19:59:53,057 INFO L226 Difference]: Without dead ends: 252 [2020-10-15 19:59:53,058 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=290, Invalid=702, Unknown=0, NotChecked=0, Total=992 [2020-10-15 19:59:53,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-10-15 19:59:53,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 164. [2020-10-15 19:59:53,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-15 19:59:53,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 405 transitions. [2020-10-15 19:59:53,061 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 405 transitions. Word has length 14 [2020-10-15 19:59:53,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:59:53,061 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 405 transitions. [2020-10-15 19:59:53,061 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:59:53,061 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 405 transitions. [2020-10-15 19:59:53,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:59:53,062 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:59:53,062 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:59:53,263 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable196 [2020-10-15 19:59:53,263 INFO L429 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:59:53,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:59:53,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1262179381, now seen corresponding path program 164 times [2020-10-15 19:59:53,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:59:53,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400206209] [2020-10-15 19:59:53,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:59:53,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:59:53,385 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:59:53,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400206209] [2020-10-15 19:59:53,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458886407] [2020-10-15 19:59:53,386 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 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:59:53,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:59:53,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:59:53,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:59:53,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:59:55,119 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:59:55,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:59:55,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:59:55,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788027735] [2020-10-15 19:59:55,120 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:59:55,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:59:55,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:59:55,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:59:55,120 INFO L87 Difference]: Start difference. First operand 164 states and 405 transitions. Second operand 17 states. [2020-10-15 19:59:59,580 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-15 20:00:14,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:00:14,422 INFO L93 Difference]: Finished difference Result 264 states and 610 transitions. [2020-10-15 20:00:14,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 20:00:14,423 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:00:14,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:00:14,424 INFO L225 Difference]: With dead ends: 264 [2020-10-15 20:00:14,424 INFO L226 Difference]: Without dead ends: 262 [2020-10-15 20:00:14,425 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=289, Invalid=699, Unknown=4, NotChecked=0, Total=992 [2020-10-15 20:00:14,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-10-15 20:00:14,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 165. [2020-10-15 20:00:14,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-15 20:00:14,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 409 transitions. [2020-10-15 20:00:14,428 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 409 transitions. Word has length 14 [2020-10-15 20:00:14,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:00:14,428 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 409 transitions. [2020-10-15 20:00:14,428 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:00:14,428 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 409 transitions. [2020-10-15 20:00:14,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:00:14,429 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:00:14,429 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:00:14,629 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:00:14,630 INFO L429 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:00:14,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:00:14,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1262841510, now seen corresponding path program 165 times [2020-10-15 20:00:14,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:00:14,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216411191] [2020-10-15 20:00:14,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:00:14,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:00:14,768 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:00:14,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216411191] [2020-10-15 20:00:14,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781409969] [2020-10-15 20:00:14,769 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 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:00:14,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 20:00:14,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:00:14,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:00:14,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:00:15,128 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:00:15,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:00:15,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:00:15,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687931257] [2020-10-15 20:00:15,129 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:00:15,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:00:15,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:00:15,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:00:15,129 INFO L87 Difference]: Start difference. First operand 165 states and 409 transitions. Second operand 17 states. [2020-10-15 20:00:16,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:00:16,081 INFO L93 Difference]: Finished difference Result 255 states and 604 transitions. [2020-10-15 20:00:16,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 20:00:16,083 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:00:16,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:00:16,083 INFO L225 Difference]: With dead ends: 255 [2020-10-15 20:00:16,084 INFO L226 Difference]: Without dead ends: 253 [2020-10-15 20:00:16,084 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=313, Invalid=679, Unknown=0, NotChecked=0, Total=992 [2020-10-15 20:00:16,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-10-15 20:00:16,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 167. [2020-10-15 20:00:16,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-15 20:00:16,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 416 transitions. [2020-10-15 20:00:16,088 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 416 transitions. Word has length 14 [2020-10-15 20:00:16,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:00:16,088 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 416 transitions. [2020-10-15 20:00:16,088 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:00:16,088 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 416 transitions. [2020-10-15 20:00:16,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:00:16,088 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:00:16,088 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:00:16,289 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:00:16,289 INFO L429 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:00:16,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:00:16,290 INFO L82 PathProgramCache]: Analyzing trace with hash 1262862869, now seen corresponding path program 166 times [2020-10-15 20:00:16,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:00:16,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207809619] [2020-10-15 20:00:16,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:00:16,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:00:16,424 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:00:16,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207809619] [2020-10-15 20:00:16,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146764424] [2020-10-15 20:00:16,425 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 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:00:16,464 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:00:16,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:00:16,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:00:16,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:00:16,716 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:00:16,777 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:00:16,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:00:16,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:00:16,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618873456] [2020-10-15 20:00:16,778 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:00:16,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:00:16,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:00:16,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:00:16,778 INFO L87 Difference]: Start difference. First operand 167 states and 416 transitions. Second operand 17 states. [2020-10-15 20:00:17,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:00:17,996 INFO L93 Difference]: Finished difference Result 256 states and 613 transitions. [2020-10-15 20:00:17,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 20:00:17,997 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:00:17,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:00:17,998 INFO L225 Difference]: With dead ends: 256 [2020-10-15 20:00:17,998 INFO L226 Difference]: Without dead ends: 251 [2020-10-15 20:00:17,999 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=408, Invalid=852, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 20:00:17,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-10-15 20:00:18,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 167. [2020-10-15 20:00:18,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-15 20:00:18,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 416 transitions. [2020-10-15 20:00:18,002 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 416 transitions. Word has length 14 [2020-10-15 20:00:18,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:00:18,002 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 416 transitions. [2020-10-15 20:00:18,002 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:00:18,002 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 416 transitions. [2020-10-15 20:00:18,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:00:18,003 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:00:18,003 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:00:18,203 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2020-10-15 20:00:18,203 INFO L429 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:00:18,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:00:18,204 INFO L82 PathProgramCache]: Analyzing trace with hash 1262863830, now seen corresponding path program 167 times [2020-10-15 20:00:18,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:00:18,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621885100] [2020-10-15 20:00:18,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:00:18,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:00:18,347 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:00:18,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621885100] [2020-10-15 20:00:18,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193408058] [2020-10-15 20:00:18,348 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 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:00:18,389 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 20:00:18,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:00:18,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:00:18,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:00:18,673 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:00:18,678 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:00:18,683 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:00:22,768 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 27 [2020-10-15 20:00:22,769 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:00:22,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:00:22,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-10-15 20:00:22,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655869201] [2020-10-15 20:00:22,770 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 20:00:22,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:00:22,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 20:00:22,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=216, Unknown=1, NotChecked=0, Total=306 [2020-10-15 20:00:22,771 INFO L87 Difference]: Start difference. First operand 167 states and 416 transitions. Second operand 18 states. [2020-10-15 20:00:27,734 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 46 DAG size of output: 39 [2020-10-15 20:00:29,951 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 42 [2020-10-15 20:00:36,392 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 31 [2020-10-15 20:00:46,630 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 39 [2020-10-15 20:01:07,328 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2020-10-15 20:01:38,327 WARN L193 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2020-10-15 20:02:08,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:02:08,728 INFO L93 Difference]: Finished difference Result 311 states and 731 transitions. [2020-10-15 20:02:08,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 20:02:08,729 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-10-15 20:02:08,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:02:08,730 INFO L225 Difference]: With dead ends: 311 [2020-10-15 20:02:08,730 INFO L226 Difference]: Without dead ends: 306 [2020-10-15 20:02:08,730 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 53.0s TimeCoverageRelationStatistics Valid=499, Invalid=1207, Unknown=16, NotChecked=0, Total=1722 [2020-10-15 20:02:08,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2020-10-15 20:02:08,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 165. [2020-10-15 20:02:08,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-15 20:02:08,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 409 transitions. [2020-10-15 20:02:08,735 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 409 transitions. Word has length 14 [2020-10-15 20:02:08,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:02:08,735 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 409 transitions. [2020-10-15 20:02:08,735 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 20:02:08,736 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 409 transitions. [2020-10-15 20:02:08,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:02:08,736 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:02:08,736 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:02:08,936 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2020-10-15 20:02:08,937 INFO L429 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:02:08,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:02:08,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1262871301, now seen corresponding path program 168 times [2020-10-15 20:02:08,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:02:08,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493375828] [2020-10-15 20:02:08,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:02:08,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:02:09,104 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:02:09,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493375828] [2020-10-15 20:02:09,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893012848] [2020-10-15 20:02:09,105 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 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:02:09,151 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 20:02:09,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:02:09,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:02:09,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:02:13,086 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:02:13,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:02:13,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:02:13,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971390271] [2020-10-15 20:02:13,087 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:02:13,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:02:13,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:02:13,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=196, Unknown=1, NotChecked=0, Total=272 [2020-10-15 20:02:13,088 INFO L87 Difference]: Start difference. First operand 165 states and 409 transitions. Second operand 17 states. [2020-10-15 20:02:17,551 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-10-15 20:02:21,856 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-15 20:02:22,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:02:22,746 INFO L93 Difference]: Finished difference Result 271 states and 639 transitions. [2020-10-15 20:02:22,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-15 20:02:22,747 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:02:22,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:02:22,748 INFO L225 Difference]: With dead ends: 271 [2020-10-15 20:02:22,748 INFO L226 Difference]: Without dead ends: 269 [2020-10-15 20:02:22,748 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=348, Invalid=841, Unknown=1, NotChecked=0, Total=1190 [2020-10-15 20:02:22,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-10-15 20:02:22,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 167. [2020-10-15 20:02:22,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-15 20:02:22,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 416 transitions. [2020-10-15 20:02:22,753 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 416 transitions. Word has length 14 [2020-10-15 20:02:22,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:02:22,753 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 416 transitions. [2020-10-15 20:02:22,753 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:02:22,753 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 416 transitions. [2020-10-15 20:02:22,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:02:22,753 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:02:22,754 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:02:22,960 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2020-10-15 20:02:22,961 INFO L429 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:02:22,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:02:22,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1262892660, now seen corresponding path program 169 times [2020-10-15 20:02:22,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:02:22,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212666006] [2020-10-15 20:02:22,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:02:22,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:02:23,136 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:02:23,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212666006] [2020-10-15 20:02:23,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078128832] [2020-10-15 20:02:23,137 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 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:02:23,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:02:23,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:02:23,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:02:32,833 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:02:32,837 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:02:32,920 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:02:32,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:02:32,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:02:32,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384814447] [2020-10-15 20:02:32,921 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:02:32,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:02:32,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:02:32,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=181, Unknown=4, NotChecked=0, Total=272 [2020-10-15 20:02:32,921 INFO L87 Difference]: Start difference. First operand 167 states and 416 transitions. Second operand 17 states. [2020-10-15 20:02:37,379 WARN L193 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-10-15 20:02:41,825 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-10-15 20:03:01,525 WARN L193 SmtUtils]: Spent 1.73 s on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2020-10-15 20:03:15,267 WARN L193 SmtUtils]: Spent 3.20 s on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2020-10-15 20:03:30,206 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2020-10-15 20:03:30,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:03:30,481 INFO L93 Difference]: Finished difference Result 299 states and 714 transitions. [2020-10-15 20:03:30,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 20:03:30,483 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:03:30,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:03:30,483 INFO L225 Difference]: With dead ends: 299 [2020-10-15 20:03:30,483 INFO L226 Difference]: Without dead ends: 291 [2020-10-15 20:03:30,484 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 42.2s TimeCoverageRelationStatistics Valid=434, Invalid=962, Unknown=10, NotChecked=0, Total=1406 [2020-10-15 20:03:30,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-10-15 20:03:30,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 168. [2020-10-15 20:03:30,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-10-15 20:03:30,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 421 transitions. [2020-10-15 20:03:30,487 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 421 transitions. Word has length 14 [2020-10-15 20:03:30,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:03:30,487 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 421 transitions. [2020-10-15 20:03:30,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:03:30,487 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 421 transitions. [2020-10-15 20:03:30,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:03:30,488 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:03:30,488 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:03:30,688 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2020-10-15 20:03:30,689 INFO L429 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:03:30,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:03:30,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1262893621, now seen corresponding path program 170 times [2020-10-15 20:03:30,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:03:30,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254693208] [2020-10-15 20:03:30,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:03:30,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:03:30,892 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:03:30,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254693208] [2020-10-15 20:03:30,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21116274] [2020-10-15 20:03:30,893 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 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:03:30,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:03:30,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:03:30,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:03:30,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:03:33,374 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:03:33,446 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:03:33,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:03:33,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:03:33,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387864126] [2020-10-15 20:03:33,447 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:03:33,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:03:33,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:03:33,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=189, Unknown=1, NotChecked=0, Total=272 [2020-10-15 20:03:33,448 INFO L87 Difference]: Start difference. First operand 168 states and 421 transitions. Second operand 17 states. [2020-10-15 20:03:34,496 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 38 [2020-10-15 20:03:35,586 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 40 [2020-10-15 20:03:36,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:03:36,420 INFO L93 Difference]: Finished difference Result 292 states and 701 transitions. [2020-10-15 20:03:36,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 20:03:36,423 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:03:36,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:03:36,424 INFO L225 Difference]: With dead ends: 292 [2020-10-15 20:03:36,424 INFO L226 Difference]: Without dead ends: 284 [2020-10-15 20:03:36,424 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=425, Invalid=980, Unknown=1, NotChecked=0, Total=1406 [2020-10-15 20:03:36,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-10-15 20:03:36,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 162. [2020-10-15 20:03:36,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-15 20:03:36,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 403 transitions. [2020-10-15 20:03:36,427 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 403 transitions. Word has length 14 [2020-10-15 20:03:36,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:03:36,428 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 403 transitions. [2020-10-15 20:03:36,428 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:03:36,428 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 403 transitions. [2020-10-15 20:03:36,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:03:36,428 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:03:36,428 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:03:36,629 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2020-10-15 20:03:36,629 INFO L429 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:03:36,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:03:36,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1263101941, now seen corresponding path program 171 times [2020-10-15 20:03:36,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:03:36,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652201345] [2020-10-15 20:03:36,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:03:36,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:03:36,850 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:03:36,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652201345] [2020-10-15 20:03:36,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693689060] [2020-10-15 20:03:36,850 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 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:03:36,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 20:03:36,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:03:36,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:03:36,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:03:37,371 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:03:37,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:03:37,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:03:37,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012562044] [2020-10-15 20:03:37,372 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:03:37,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:03:37,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:03:37,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:03:37,373 INFO L87 Difference]: Start difference. First operand 162 states and 403 transitions. Second operand 17 states. [2020-10-15 20:03:38,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:03:38,461 INFO L93 Difference]: Finished difference Result 231 states and 545 transitions. [2020-10-15 20:03:38,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 20:03:38,464 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:03:38,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:03:38,465 INFO L225 Difference]: With dead ends: 231 [2020-10-15 20:03:38,466 INFO L226 Difference]: Without dead ends: 229 [2020-10-15 20:03:38,466 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=202, Invalid=500, Unknown=0, NotChecked=0, Total=702 [2020-10-15 20:03:38,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-10-15 20:03:38,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 162. [2020-10-15 20:03:38,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-15 20:03:38,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 403 transitions. [2020-10-15 20:03:38,470 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 403 transitions. Word has length 14 [2020-10-15 20:03:38,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:03:38,470 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 403 transitions. [2020-10-15 20:03:38,470 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:03:38,470 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 403 transitions. [2020-10-15 20:03:38,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:03:38,471 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:03:38,471 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:03:38,671 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable204 [2020-10-15 20:03:38,672 INFO L429 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:03:38,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:03:38,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1263765031, now seen corresponding path program 172 times [2020-10-15 20:03:38,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:03:38,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589663602] [2020-10-15 20:03:38,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:03:38,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:03:38,849 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:03:38,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589663602] [2020-10-15 20:03:38,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769224592] [2020-10-15 20:03:38,850 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 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:03:38,890 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:03:38,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:03:38,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:03:38,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:03:39,375 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:03:39,375 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:03:39,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:03:39,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556223575] [2020-10-15 20:03:39,376 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:03:39,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:03:39,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:03:39,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:03:39,376 INFO L87 Difference]: Start difference. First operand 162 states and 403 transitions. Second operand 17 states. [2020-10-15 20:03:40,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:03:40,712 INFO L93 Difference]: Finished difference Result 250 states and 594 transitions. [2020-10-15 20:03:40,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 20:03:40,715 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:03:40,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:03:40,716 INFO L225 Difference]: With dead ends: 250 [2020-10-15 20:03:40,716 INFO L226 Difference]: Without dead ends: 248 [2020-10-15 20:03:40,717 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=300, Invalid=692, Unknown=0, NotChecked=0, Total=992 [2020-10-15 20:03:40,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-10-15 20:03:40,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 163. [2020-10-15 20:03:40,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 20:03:40,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 405 transitions. [2020-10-15 20:03:40,719 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 405 transitions. Word has length 14 [2020-10-15 20:03:40,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:03:40,720 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 405 transitions. [2020-10-15 20:03:40,720 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:03:40,720 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 405 transitions. [2020-10-15 20:03:40,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:03:40,720 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:03:40,720 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:03:40,921 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:03:40,921 INFO L429 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:03:40,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:03:40,922 INFO L82 PathProgramCache]: Analyzing trace with hash 1263787351, now seen corresponding path program 173 times [2020-10-15 20:03:40,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:03:40,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555066826] [2020-10-15 20:03:40,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:03:40,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:03:41,118 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:03:41,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555066826] [2020-10-15 20:03:41,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523033925] [2020-10-15 20:03:41,119 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 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:03:41,158 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 20:03:41,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:03:41,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:03:41,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:03:41,607 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:03:41,659 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:03:41,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:03:41,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:03:41,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692786561] [2020-10-15 20:03:41,660 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:03:41,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:03:41,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:03:41,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:03:41,660 INFO L87 Difference]: Start difference. First operand 163 states and 405 transitions. Second operand 17 states. [2020-10-15 20:03:43,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:03:43,822 INFO L93 Difference]: Finished difference Result 288 states and 686 transitions. [2020-10-15 20:03:43,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 20:03:43,826 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:03:43,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:03:43,826 INFO L225 Difference]: With dead ends: 288 [2020-10-15 20:03:43,827 INFO L226 Difference]: Without dead ends: 283 [2020-10-15 20:03:43,827 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=426, Invalid=980, Unknown=0, NotChecked=0, Total=1406 [2020-10-15 20:03:43,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-10-15 20:03:43,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 159. [2020-10-15 20:03:43,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-15 20:03:43,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 388 transitions. [2020-10-15 20:03:43,830 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 388 transitions. Word has length 14 [2020-10-15 20:03:43,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:03:43,830 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 388 transitions. [2020-10-15 20:03:43,830 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:03:43,831 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 388 transitions. [2020-10-15 20:03:43,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:03:43,831 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:03:43,831 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:03:44,031 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2020-10-15 20:03:44,032 INFO L429 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:03:44,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:03:44,032 INFO L82 PathProgramCache]: Analyzing trace with hash 1463267670, now seen corresponding path program 174 times [2020-10-15 20:03:44,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:03:44,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054584040] [2020-10-15 20:03:44,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:03:44,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:03:44,240 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:03:44,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054584040] [2020-10-15 20:03:44,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928116134] [2020-10-15 20:03:44,240 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 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:03:44,283 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 20:03:44,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:03:44,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:03:44,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:03:44,667 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:03:44,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:03:44,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:03:44,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398148848] [2020-10-15 20:03:44,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:03:44,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:03:44,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:03:44,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:03:44,669 INFO L87 Difference]: Start difference. First operand 159 states and 388 transitions. Second operand 17 states. [2020-10-15 20:03:45,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:03:45,470 INFO L93 Difference]: Finished difference Result 236 states and 544 transitions. [2020-10-15 20:03:45,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 20:03:45,472 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:03:45,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:03:45,472 INFO L225 Difference]: With dead ends: 236 [2020-10-15 20:03:45,472 INFO L226 Difference]: Without dead ends: 234 [2020-10-15 20:03:45,473 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=212, Invalid=544, Unknown=0, NotChecked=0, Total=756 [2020-10-15 20:03:45,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-10-15 20:03:45,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 163. [2020-10-15 20:03:45,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 20:03:45,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 402 transitions. [2020-10-15 20:03:45,476 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 402 transitions. Word has length 14 [2020-10-15 20:03:45,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:03:45,476 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 402 transitions. [2020-10-15 20:03:45,476 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:03:45,476 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 402 transitions. [2020-10-15 20:03:45,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:03:45,476 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:03:45,476 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:03:45,677 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:03:45,677 INFO L429 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:03:45,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:03:45,678 INFO L82 PathProgramCache]: Analyzing trace with hash 1463268631, now seen corresponding path program 175 times [2020-10-15 20:03:45,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:03:45,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155095458] [2020-10-15 20:03:45,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:03:45,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:03:45,906 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:03:45,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155095458] [2020-10-15 20:03:45,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236155902] [2020-10-15 20:03:45,907 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 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:03:45,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:03:45,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:03:45,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:03:46,361 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:03:46,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:03:46,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:03:46,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228503586] [2020-10-15 20:03:46,363 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:03:46,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:03:46,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:03:46,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:03:46,363 INFO L87 Difference]: Start difference. First operand 163 states and 402 transitions. Second operand 17 states. [2020-10-15 20:03:47,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:03:47,256 INFO L93 Difference]: Finished difference Result 246 states and 565 transitions. [2020-10-15 20:03:47,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 20:03:47,258 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:03:47,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:03:47,259 INFO L225 Difference]: With dead ends: 246 [2020-10-15 20:03:47,259 INFO L226 Difference]: Without dead ends: 244 [2020-10-15 20:03:47,259 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=209, Invalid=547, Unknown=0, NotChecked=0, Total=756 [2020-10-15 20:03:47,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-10-15 20:03:47,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 163. [2020-10-15 20:03:47,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 20:03:47,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 402 transitions. [2020-10-15 20:03:47,262 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 402 transitions. Word has length 14 [2020-10-15 20:03:47,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:03:47,262 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 402 transitions. [2020-10-15 20:03:47,262 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:03:47,262 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 402 transitions. [2020-10-15 20:03:47,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:03:47,263 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:03:47,263 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:03:47,463 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:03:47,463 INFO L429 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:03:47,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:03:47,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1463297461, now seen corresponding path program 176 times [2020-10-15 20:03:47,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:03:47,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748096400] [2020-10-15 20:03:47,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:03:47,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:03:47,678 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:03:47,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748096400] [2020-10-15 20:03:47,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799089701] [2020-10-15 20:03:47,679 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 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:03:47,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:03:47,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:03:47,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:03:47,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:03:48,010 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:03:48,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:03:48,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:03:48,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601111628] [2020-10-15 20:03:48,012 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:03:48,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:03:48,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:03:48,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:03:48,012 INFO L87 Difference]: Start difference. First operand 163 states and 402 transitions. Second operand 17 states. [2020-10-15 20:03:48,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:03:48,779 INFO L93 Difference]: Finished difference Result 239 states and 554 transitions. [2020-10-15 20:03:48,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 20:03:48,782 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:03:48,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:03:48,783 INFO L225 Difference]: With dead ends: 239 [2020-10-15 20:03:48,783 INFO L226 Difference]: Without dead ends: 237 [2020-10-15 20:03:48,783 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=196, Invalid=506, Unknown=0, NotChecked=0, Total=702 [2020-10-15 20:03:48,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-10-15 20:03:48,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 163. [2020-10-15 20:03:48,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 20:03:48,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 402 transitions. [2020-10-15 20:03:48,787 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 402 transitions. Word has length 14 [2020-10-15 20:03:48,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:03:48,787 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 402 transitions. [2020-10-15 20:03:48,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:03:48,787 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 402 transitions. [2020-10-15 20:03:48,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:03:48,788 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:03:48,788 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:03:48,988 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:03:48,989 INFO L429 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:03:48,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:03:48,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1464221943, now seen corresponding path program 177 times [2020-10-15 20:03:48,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:03:48,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487336741] [2020-10-15 20:03:48,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:03:48,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:03:49,171 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:03:49,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487336741] [2020-10-15 20:03:49,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792445325] [2020-10-15 20:03:49,172 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 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:03:49,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 20:03:49,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:03:49,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:03:49,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:03:49,555 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:03:49,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:03:49,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:03:49,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575180000] [2020-10-15 20:03:49,556 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:03:49,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:03:49,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:03:49,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:03:49,556 INFO L87 Difference]: Start difference. First operand 163 states and 402 transitions. Second operand 17 states. [2020-10-15 20:03:50,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:03:50,148 INFO L93 Difference]: Finished difference Result 229 states and 529 transitions. [2020-10-15 20:03:50,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 20:03:50,150 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:03:50,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:03:50,151 INFO L225 Difference]: With dead ends: 229 [2020-10-15 20:03:50,151 INFO L226 Difference]: Without dead ends: 227 [2020-10-15 20:03:50,151 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=178, Invalid=472, Unknown=0, NotChecked=0, Total=650 [2020-10-15 20:03:50,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-15 20:03:50,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 161. [2020-10-15 20:03:50,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-15 20:03:50,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 395 transitions. [2020-10-15 20:03:50,155 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 395 transitions. Word has length 14 [2020-10-15 20:03:50,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:03:50,155 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 395 transitions. [2020-10-15 20:03:50,155 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:03:50,155 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 395 transitions. [2020-10-15 20:03:50,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:03:50,155 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:03:50,155 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:03:50,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2020-10-15 20:03:50,356 INFO L429 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:03:50,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:03:50,357 INFO L82 PathProgramCache]: Analyzing trace with hash 2100497160, now seen corresponding path program 178 times [2020-10-15 20:03:50,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:03:50,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172119829] [2020-10-15 20:03:50,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:03:50,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:03:50,518 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:03:50,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172119829] [2020-10-15 20:03:50,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256680595] [2020-10-15 20:03:50,519 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 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:03:50,561 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:03:50,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:03:50,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:03:50,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:03:50,874 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:03:50,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:03:50,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:03:50,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803308921] [2020-10-15 20:03:50,875 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:03:50,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:03:50,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:03:50,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:03:50,876 INFO L87 Difference]: Start difference. First operand 161 states and 395 transitions. Second operand 17 states. [2020-10-15 20:03:52,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:03:52,363 INFO L93 Difference]: Finished difference Result 261 states and 599 transitions. [2020-10-15 20:03:52,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 20:03:52,366 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:03:52,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:03:52,367 INFO L225 Difference]: With dead ends: 261 [2020-10-15 20:03:52,367 INFO L226 Difference]: Without dead ends: 259 [2020-10-15 20:03:52,368 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=353, Invalid=907, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 20:03:52,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-10-15 20:03:52,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 164. [2020-10-15 20:03:52,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-15 20:03:52,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 406 transitions. [2020-10-15 20:03:52,372 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 406 transitions. Word has length 14 [2020-10-15 20:03:52,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:03:52,372 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 406 transitions. [2020-10-15 20:03:52,372 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:03:52,372 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 406 transitions. [2020-10-15 20:03:52,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:03:52,373 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:03:52,373 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:03:52,573 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable211,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:03:52,574 INFO L429 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:03:52,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:03:52,574 INFO L82 PathProgramCache]: Analyzing trace with hash 2100498121, now seen corresponding path program 179 times [2020-10-15 20:03:52,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:03:52,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96201828] [2020-10-15 20:03:52,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:03:52,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:03:52,801 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:03:52,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96201828] [2020-10-15 20:03:52,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762104229] [2020-10-15 20:03:52,802 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 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:03:52,844 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:03:52,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:03:52,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:03:52,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:03:53,300 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:03:53,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:03:53,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:03:53,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084827060] [2020-10-15 20:03:53,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:03:53,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:03:53,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:03:53,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:03:53,301 INFO L87 Difference]: Start difference. First operand 164 states and 406 transitions. Second operand 17 states. [2020-10-15 20:03:54,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:03:54,774 INFO L93 Difference]: Finished difference Result 271 states and 622 transitions. [2020-10-15 20:03:54,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 20:03:54,777 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:03:54,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:03:54,778 INFO L225 Difference]: With dead ends: 271 [2020-10-15 20:03:54,779 INFO L226 Difference]: Without dead ends: 269 [2020-10-15 20:03:54,779 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=296, Invalid=760, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 20:03:54,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-10-15 20:03:54,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 166. [2020-10-15 20:03:54,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-15 20:03:54,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 413 transitions. [2020-10-15 20:03:54,784 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 413 transitions. Word has length 14 [2020-10-15 20:03:54,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:03:54,784 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 413 transitions. [2020-10-15 20:03:54,784 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:03:54,784 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 413 transitions. [2020-10-15 20:03:54,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:03:54,785 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:03:54,785 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:03:54,996 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2020-10-15 20:03:54,997 INFO L429 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:03:54,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:03:54,997 INFO L82 PathProgramCache]: Analyzing trace with hash 2100526951, now seen corresponding path program 180 times [2020-10-15 20:03:54,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:03:54,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666751751] [2020-10-15 20:03:54,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:03:55,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:03:55,215 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:03:55,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666751751] [2020-10-15 20:03:55,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141958939] [2020-10-15 20:03:55,215 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 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:03:55,259 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 20:03:55,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:03:55,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:03:55,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:03:55,626 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:03:55,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:03:55,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:03:55,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767482426] [2020-10-15 20:03:55,627 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:03:55,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:03:55,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:03:55,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:03:55,628 INFO L87 Difference]: Start difference. First operand 166 states and 413 transitions. Second operand 17 states. [2020-10-15 20:03:56,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:03:56,837 INFO L93 Difference]: Finished difference Result 253 states and 588 transitions. [2020-10-15 20:03:56,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 20:03:56,840 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:03:56,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:03:56,841 INFO L225 Difference]: With dead ends: 253 [2020-10-15 20:03:56,841 INFO L226 Difference]: Without dead ends: 251 [2020-10-15 20:03:56,842 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=274, Invalid=718, Unknown=0, NotChecked=0, Total=992 [2020-10-15 20:03:56,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-10-15 20:03:56,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 165. [2020-10-15 20:03:56,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-15 20:03:56,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 410 transitions. [2020-10-15 20:03:56,845 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 410 transitions. Word has length 14 [2020-10-15 20:03:56,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:03:56,845 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 410 transitions. [2020-10-15 20:03:56,845 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:03:56,845 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 410 transitions. [2020-10-15 20:03:56,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:03:56,846 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:03:56,846 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:03:57,046 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2020-10-15 20:03:57,047 INFO L429 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:03:57,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:03:57,047 INFO L82 PathProgramCache]: Analyzing trace with hash 2121052950, now seen corresponding path program 181 times [2020-10-15 20:03:57,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:03:57,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142222800] [2020-10-15 20:03:57,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:03:57,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:03:57,272 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:03:57,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142222800] [2020-10-15 20:03:57,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003122244] [2020-10-15 20:03:57,273 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 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:03:57,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:03:57,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:03:57,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:03:57,732 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:03:57,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:03:57,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:03:57,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636259989] [2020-10-15 20:03:57,733 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:03:57,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:03:57,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:03:57,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:03:57,734 INFO L87 Difference]: Start difference. First operand 165 states and 410 transitions. Second operand 17 states. [2020-10-15 20:03:59,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:03:59,428 INFO L93 Difference]: Finished difference Result 268 states and 622 transitions. [2020-10-15 20:03:59,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 20:03:59,431 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:03:59,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:03:59,432 INFO L225 Difference]: With dead ends: 268 [2020-10-15 20:03:59,432 INFO L226 Difference]: Without dead ends: 266 [2020-10-15 20:03:59,433 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=395, Invalid=937, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 20:03:59,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-10-15 20:03:59,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 167. [2020-10-15 20:03:59,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-15 20:03:59,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 418 transitions. [2020-10-15 20:03:59,436 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 418 transitions. Word has length 14 [2020-10-15 20:03:59,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:03:59,436 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 418 transitions. [2020-10-15 20:03:59,437 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:03:59,437 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 418 transitions. [2020-10-15 20:03:59,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:03:59,437 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:03:59,437 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:03:59,637 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:03:59,638 INFO L429 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:03:59,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:03:59,638 INFO L82 PathProgramCache]: Analyzing trace with hash 2121053911, now seen corresponding path program 182 times [2020-10-15 20:03:59,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:03:59,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164411896] [2020-10-15 20:03:59,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:03:59,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:03:59,869 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:03:59,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164411896] [2020-10-15 20:03:59,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772638179] [2020-10-15 20:03:59,870 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 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:03:59,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:03:59,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:03:59,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:03:59,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:04:00,358 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:04:00,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:04:00,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:04:00,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216254073] [2020-10-15 20:04:00,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:04:00,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:04:00,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:04:00,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:04:00,360 INFO L87 Difference]: Start difference. First operand 167 states and 418 transitions. Second operand 17 states. [2020-10-15 20:04:02,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:04:02,101 INFO L93 Difference]: Finished difference Result 271 states and 630 transitions. [2020-10-15 20:04:02,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 20:04:02,103 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:04:02,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:04:02,104 INFO L225 Difference]: With dead ends: 271 [2020-10-15 20:04:02,104 INFO L226 Difference]: Without dead ends: 269 [2020-10-15 20:04:02,105 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=361, Invalid=899, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 20:04:02,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-10-15 20:04:02,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 169. [2020-10-15 20:04:02,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-15 20:04:02,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 424 transitions. [2020-10-15 20:04:02,108 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 424 transitions. Word has length 14 [2020-10-15 20:04:02,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:04:02,108 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 424 transitions. [2020-10-15 20:04:02,108 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:04:02,108 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 424 transitions. [2020-10-15 20:04:02,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:04:02,109 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:04:02,109 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:04:02,309 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2020-10-15 20:04:02,310 INFO L429 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:04:02,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:04:02,310 INFO L82 PathProgramCache]: Analyzing trace with hash 2121716040, now seen corresponding path program 183 times [2020-10-15 20:04:02,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:04:02,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218402727] [2020-10-15 20:04:02,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:04:02,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:04:02,563 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:04:02,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218402727] [2020-10-15 20:04:02,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828328656] [2020-10-15 20:04:02,564 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 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:04:02,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 20:04:02,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:04:02,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:04:02,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:04:02,999 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:04:03,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:04:03,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:04:03,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325115330] [2020-10-15 20:04:03,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:04:03,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:04:03,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:04:03,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:04:03,002 INFO L87 Difference]: Start difference. First operand 169 states and 424 transitions. Second operand 17 states. [2020-10-15 20:04:04,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:04:04,585 INFO L93 Difference]: Finished difference Result 262 states and 620 transitions. [2020-10-15 20:04:04,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 20:04:04,589 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:04:04,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:04:04,590 INFO L225 Difference]: With dead ends: 262 [2020-10-15 20:04:04,590 INFO L226 Difference]: Without dead ends: 260 [2020-10-15 20:04:04,590 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=408, Invalid=924, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 20:04:04,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-10-15 20:04:04,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 171. [2020-10-15 20:04:04,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-10-15 20:04:04,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 431 transitions. [2020-10-15 20:04:04,593 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 431 transitions. Word has length 14 [2020-10-15 20:04:04,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:04:04,593 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 431 transitions. [2020-10-15 20:04:04,593 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:04:04,593 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 431 transitions. [2020-10-15 20:04:04,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:04:04,594 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:04:04,594 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:04:04,794 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable216 [2020-10-15 20:04:04,795 INFO L429 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:04:04,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:04:04,795 INFO L82 PathProgramCache]: Analyzing trace with hash 2121737399, now seen corresponding path program 184 times [2020-10-15 20:04:04,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:04:04,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032040250] [2020-10-15 20:04:04,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:04:04,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:04:05,022 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:04:05,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032040250] [2020-10-15 20:04:05,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205032573] [2020-10-15 20:04:05,023 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 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:04:05,063 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:04:05,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:04:05,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:04:05,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:04:05,395 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:04:05,423 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:04:05,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:04:05,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:04:05,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898414916] [2020-10-15 20:04:05,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:04:05,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:04:05,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:04:05,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:04:05,425 INFO L87 Difference]: Start difference. First operand 171 states and 431 transitions. Second operand 17 states. [2020-10-15 20:04:06,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:04:06,976 INFO L93 Difference]: Finished difference Result 248 states and 600 transitions. [2020-10-15 20:04:06,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 20:04:06,978 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:04:06,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:04:06,979 INFO L225 Difference]: With dead ends: 248 [2020-10-15 20:04:06,979 INFO L226 Difference]: Without dead ends: 243 [2020-10-15 20:04:06,979 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=451, Invalid=955, Unknown=0, NotChecked=0, Total=1406 [2020-10-15 20:04:06,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-10-15 20:04:06,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 171. [2020-10-15 20:04:06,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-10-15 20:04:06,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 431 transitions. [2020-10-15 20:04:06,982 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 431 transitions. Word has length 14 [2020-10-15 20:04:06,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:04:06,982 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 431 transitions. [2020-10-15 20:04:06,982 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:04:06,982 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 431 transitions. [2020-10-15 20:04:06,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:04:06,983 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:04:06,983 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:04:07,183 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable217,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:04:07,184 INFO L429 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:04:07,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:04:07,184 INFO L82 PathProgramCache]: Analyzing trace with hash 2121738360, now seen corresponding path program 185 times [2020-10-15 20:04:07,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:04:07,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902429522] [2020-10-15 20:04:07,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:04:07,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:04:07,442 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:04:07,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902429522] [2020-10-15 20:04:07,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562468284] [2020-10-15 20:04:07,443 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 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:04:07,518 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 20:04:07,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:04:07,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:04:07,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:04:07,969 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:04:08,078 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:04:08,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:04:08,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:04:08,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246371754] [2020-10-15 20:04:08,080 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:04:08,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:04:08,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:04:08,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:04:08,081 INFO L87 Difference]: Start difference. First operand 171 states and 431 transitions. Second operand 17 states. [2020-10-15 20:04:10,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:04:10,171 INFO L93 Difference]: Finished difference Result 287 states and 694 transitions. [2020-10-15 20:04:10,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 20:04:10,175 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:04:10,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:04:10,175 INFO L225 Difference]: With dead ends: 287 [2020-10-15 20:04:10,175 INFO L226 Difference]: Without dead ends: 282 [2020-10-15 20:04:10,176 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=487, Invalid=1153, Unknown=0, NotChecked=0, Total=1640 [2020-10-15 20:04:10,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-10-15 20:04:10,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 169. [2020-10-15 20:04:10,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-15 20:04:10,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 424 transitions. [2020-10-15 20:04:10,180 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 424 transitions. Word has length 14 [2020-10-15 20:04:10,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:04:10,180 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 424 transitions. [2020-10-15 20:04:10,180 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:04:10,180 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 424 transitions. [2020-10-15 20:04:10,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:04:10,181 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:04:10,181 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:04:10,385 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:04:10,386 INFO L429 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:04:10,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:04:10,386 INFO L82 PathProgramCache]: Analyzing trace with hash 2121745831, now seen corresponding path program 186 times [2020-10-15 20:04:10,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:04:10,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145783695] [2020-10-15 20:04:10,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:04:10,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:04:10,568 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:04:10,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145783695] [2020-10-15 20:04:10,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217126349] [2020-10-15 20:04:10,568 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 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:04:10,610 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 20:04:10,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:04:10,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:04:10,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:04:10,927 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:04:10,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:04:10,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:04:10,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084987909] [2020-10-15 20:04:10,928 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:04:10,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:04:10,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:04:10,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:04:10,929 INFO L87 Difference]: Start difference. First operand 169 states and 424 transitions. Second operand 17 states. [2020-10-15 20:04:12,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:04:12,454 INFO L93 Difference]: Finished difference Result 284 states and 678 transitions. [2020-10-15 20:04:12,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 20:04:12,457 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:04:12,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:04:12,458 INFO L225 Difference]: With dead ends: 284 [2020-10-15 20:04:12,458 INFO L226 Difference]: Without dead ends: 282 [2020-10-15 20:04:12,458 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=423, Invalid=1059, Unknown=0, NotChecked=0, Total=1482 [2020-10-15 20:04:12,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-10-15 20:04:12,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 171. [2020-10-15 20:04:12,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-10-15 20:04:12,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 431 transitions. [2020-10-15 20:04:12,462 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 431 transitions. Word has length 14 [2020-10-15 20:04:12,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:04:12,463 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 431 transitions. [2020-10-15 20:04:12,463 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:04:12,463 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 431 transitions. [2020-10-15 20:04:12,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:04:12,463 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:04:12,463 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:04:12,664 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:04:12,664 INFO L429 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:04:12,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:04:12,667 INFO L82 PathProgramCache]: Analyzing trace with hash 2121767190, now seen corresponding path program 187 times [2020-10-15 20:04:12,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:04:12,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611307740] [2020-10-15 20:04:12,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:04:12,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:04:12,850 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:04:12,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611307740] [2020-10-15 20:04:12,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052693411] [2020-10-15 20:04:12,851 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 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:04:12,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:04:12,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:04:12,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:04:13,173 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:04:13,247 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:04:13,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:04:13,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:04:13,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760233661] [2020-10-15 20:04:13,248 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:04:13,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:04:13,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:04:13,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:04:13,249 INFO L87 Difference]: Start difference. First operand 171 states and 431 transitions. Second operand 17 states. [2020-10-15 20:04:15,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:04:15,357 INFO L93 Difference]: Finished difference Result 289 states and 702 transitions. [2020-10-15 20:04:15,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 20:04:15,359 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:04:15,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:04:15,360 INFO L225 Difference]: With dead ends: 289 [2020-10-15 20:04:15,360 INFO L226 Difference]: Without dead ends: 284 [2020-10-15 20:04:15,360 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=481, Invalid=1079, Unknown=0, NotChecked=0, Total=1560 [2020-10-15 20:04:15,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-10-15 20:04:15,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 172. [2020-10-15 20:04:15,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-10-15 20:04:15,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 436 transitions. [2020-10-15 20:04:15,364 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 436 transitions. Word has length 14 [2020-10-15 20:04:15,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:04:15,364 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 436 transitions. [2020-10-15 20:04:15,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:04:15,364 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 436 transitions. [2020-10-15 20:04:15,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:04:15,365 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:04:15,365 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:04:15,565 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:04:15,566 INFO L429 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:04:15,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:04:15,566 INFO L82 PathProgramCache]: Analyzing trace with hash 2121768151, now seen corresponding path program 188 times [2020-10-15 20:04:15,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:04:15,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805939859] [2020-10-15 20:04:15,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:04:15,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:04:15,806 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:04:15,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805939859] [2020-10-15 20:04:15,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168248357] [2020-10-15 20:04:15,807 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 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:04:15,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:04:15,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:04:15,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:04:15,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:04:16,202 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:04:16,245 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:04:16,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:04:16,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:04:16,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443787954] [2020-10-15 20:04:16,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:04:16,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:04:16,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:04:16,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:04:16,247 INFO L87 Difference]: Start difference. First operand 172 states and 436 transitions. Second operand 17 states. [2020-10-15 20:04:18,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:04:18,971 INFO L93 Difference]: Finished difference Result 312 states and 753 transitions. [2020-10-15 20:04:18,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 20:04:18,974 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:04:18,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:04:18,974 INFO L225 Difference]: With dead ends: 312 [2020-10-15 20:04:18,974 INFO L226 Difference]: Without dead ends: 304 [2020-10-15 20:04:18,975 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=543, Invalid=1349, Unknown=0, NotChecked=0, Total=1892 [2020-10-15 20:04:18,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-10-15 20:04:18,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 165. [2020-10-15 20:04:18,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-15 20:04:18,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 410 transitions. [2020-10-15 20:04:18,979 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 410 transitions. Word has length 14 [2020-10-15 20:04:18,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:04:18,979 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 410 transitions. [2020-10-15 20:04:18,979 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:04:18,979 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 410 transitions. [2020-10-15 20:04:18,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:04:18,980 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:04:18,980 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:04:19,180 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable221,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:04:19,181 INFO L429 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:04:19,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:04:19,181 INFO L82 PathProgramCache]: Analyzing trace with hash 2121976471, now seen corresponding path program 189 times [2020-10-15 20:04:19,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:04:19,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041648040] [2020-10-15 20:04:19,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:04:19,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:04:19,433 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:04:19,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041648040] [2020-10-15 20:04:19,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674242649] [2020-10-15 20:04:19,434 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 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:04:19,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 20:04:19,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:04:19,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:04:19,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:04:19,845 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:04:19,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:04:19,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:04:19,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064076048] [2020-10-15 20:04:19,847 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:04:19,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:04:19,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:04:19,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:04:19,847 INFO L87 Difference]: Start difference. First operand 165 states and 410 transitions. Second operand 17 states. [2020-10-15 20:04:21,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:04:21,314 INFO L93 Difference]: Finished difference Result 262 states and 617 transitions. [2020-10-15 20:04:21,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 20:04:21,317 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:04:21,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:04:21,318 INFO L225 Difference]: With dead ends: 262 [2020-10-15 20:04:21,318 INFO L226 Difference]: Without dead ends: 260 [2020-10-15 20:04:21,319 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=314, Invalid=808, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 20:04:21,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-10-15 20:04:21,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 167. [2020-10-15 20:04:21,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-15 20:04:21,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 419 transitions. [2020-10-15 20:04:21,323 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 419 transitions. Word has length 14 [2020-10-15 20:04:21,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:04:21,323 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 419 transitions. [2020-10-15 20:04:21,323 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:04:21,323 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 419 transitions. [2020-10-15 20:04:21,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:04:21,324 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:04:21,324 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:04:21,535 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2020-10-15 20:04:21,536 INFO L429 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:04:21,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:04:21,536 INFO L82 PathProgramCache]: Analyzing trace with hash 2122639561, now seen corresponding path program 190 times [2020-10-15 20:04:21,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:04:21,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923908112] [2020-10-15 20:04:21,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:04:21,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:04:21,781 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:04:21,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923908112] [2020-10-15 20:04:21,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032314474] [2020-10-15 20:04:21,781 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 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:04:21,828 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:04:21,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:04:21,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:04:21,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:04:22,239 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:04:22,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:04:22,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:04:22,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998447044] [2020-10-15 20:04:22,240 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:04:22,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:04:22,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:04:22,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:04:22,241 INFO L87 Difference]: Start difference. First operand 167 states and 419 transitions. Second operand 17 states. [2020-10-15 20:04:24,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:04:24,008 INFO L93 Difference]: Finished difference Result 271 states and 650 transitions. [2020-10-15 20:04:24,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 20:04:24,011 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:04:24,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:04:24,012 INFO L225 Difference]: With dead ends: 271 [2020-10-15 20:04:24,013 INFO L226 Difference]: Without dead ends: 269 [2020-10-15 20:04:24,013 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=396, Invalid=936, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 20:04:24,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-10-15 20:04:24,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 169. [2020-10-15 20:04:24,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-15 20:04:24,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 426 transitions. [2020-10-15 20:04:24,018 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 426 transitions. Word has length 14 [2020-10-15 20:04:24,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:04:24,018 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 426 transitions. [2020-10-15 20:04:24,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:04:24,018 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 426 transitions. [2020-10-15 20:04:24,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:04:24,018 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:04:24,018 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:04:24,219 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2020-10-15 20:04:24,219 INFO L429 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:04:24,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:04:24,220 INFO L82 PathProgramCache]: Analyzing trace with hash 2122660920, now seen corresponding path program 191 times [2020-10-15 20:04:24,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:04:24,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289869571] [2020-10-15 20:04:24,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:04:24,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:04:24,415 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:04:24,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289869571] [2020-10-15 20:04:24,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72234066] [2020-10-15 20:04:24,416 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 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:04:24,456 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 20:04:24,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:04:24,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:04:24,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:04:24,723 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:04:24,745 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:04:24,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:04:24,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:04:24,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245956356] [2020-10-15 20:04:24,746 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:04:24,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:04:24,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:04:24,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:04:24,747 INFO L87 Difference]: Start difference. First operand 169 states and 426 transitions. Second operand 17 states. [2020-10-15 20:04:26,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:04:26,602 INFO L93 Difference]: Finished difference Result 296 states and 714 transitions. [2020-10-15 20:04:26,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 20:04:26,605 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:04:26,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:04:26,606 INFO L225 Difference]: With dead ends: 296 [2020-10-15 20:04:26,606 INFO L226 Difference]: Without dead ends: 288 [2020-10-15 20:04:26,607 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=559, Invalid=1333, Unknown=0, NotChecked=0, Total=1892 [2020-10-15 20:04:26,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2020-10-15 20:04:26,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 171. [2020-10-15 20:04:26,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-10-15 20:04:26,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 436 transitions. [2020-10-15 20:04:26,611 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 436 transitions. Word has length 14 [2020-10-15 20:04:26,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:04:26,611 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 436 transitions. [2020-10-15 20:04:26,611 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:04:26,611 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 436 transitions. [2020-10-15 20:04:26,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:04:26,611 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:04:26,612 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:04:26,812 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2020-10-15 20:04:26,813 INFO L429 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:04:26,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:04:26,813 INFO L82 PathProgramCache]: Analyzing trace with hash 2122661881, now seen corresponding path program 192 times [2020-10-15 20:04:26,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:04:26,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591954592] [2020-10-15 20:04:26,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:04:26,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:04:27,058 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:04:27,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591954592] [2020-10-15 20:04:27,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110457762] [2020-10-15 20:04:27,059 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 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:04:27,101 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 20:04:27,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:04:27,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:04:27,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:04:27,440 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:04:27,467 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:04:27,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:04:27,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:04:27,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491066727] [2020-10-15 20:04:27,469 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:04:27,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:04:27,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:04:27,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:04:27,469 INFO L87 Difference]: Start difference. First operand 171 states and 436 transitions. Second operand 17 states. [2020-10-15 20:04:29,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:04:29,578 INFO L93 Difference]: Finished difference Result 298 states and 732 transitions. [2020-10-15 20:04:29,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 20:04:29,582 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:04:29,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:04:29,583 INFO L225 Difference]: With dead ends: 298 [2020-10-15 20:04:29,583 INFO L226 Difference]: Without dead ends: 290 [2020-10-15 20:04:29,583 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=483, Invalid=1157, Unknown=0, NotChecked=0, Total=1640 [2020-10-15 20:04:29,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2020-10-15 20:04:29,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 169. [2020-10-15 20:04:29,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-15 20:04:29,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 429 transitions. [2020-10-15 20:04:29,587 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 429 transitions. Word has length 14 [2020-10-15 20:04:29,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:04:29,587 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 429 transitions. [2020-10-15 20:04:29,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:04:29,587 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 429 transitions. [2020-10-15 20:04:29,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:04:29,587 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:04:29,588 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:04:29,788 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2020-10-15 20:04:29,788 INFO L429 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:04:29,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:04:29,789 INFO L82 PathProgramCache]: Analyzing trace with hash 2122690711, now seen corresponding path program 193 times [2020-10-15 20:04:29,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:04:29,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355166172] [2020-10-15 20:04:29,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:04:29,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:04:30,055 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:04:30,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355166172] [2020-10-15 20:04:30,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756608482] [2020-10-15 20:04:30,056 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 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:04:30,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:04:30,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:04:30,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:04:30,456 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:04:30,491 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:04:30,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:04:30,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:04:30,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324021762] [2020-10-15 20:04:30,491 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:04:30,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:04:30,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:04:30,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:04:30,492 INFO L87 Difference]: Start difference. First operand 169 states and 429 transitions. Second operand 17 states. [2020-10-15 20:04:32,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:04:32,881 INFO L93 Difference]: Finished difference Result 291 states and 709 transitions. [2020-10-15 20:04:32,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 20:04:32,885 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:04:32,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:04:32,885 INFO L225 Difference]: With dead ends: 291 [2020-10-15 20:04:32,886 INFO L226 Difference]: Without dead ends: 283 [2020-10-15 20:04:32,886 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=480, Invalid=1160, Unknown=0, NotChecked=0, Total=1640 [2020-10-15 20:04:32,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-10-15 20:04:32,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 167. [2020-10-15 20:04:32,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-15 20:04:32,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 419 transitions. [2020-10-15 20:04:32,889 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 419 transitions. Word has length 14 [2020-10-15 20:04:32,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:04:32,889 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 419 transitions. [2020-10-15 20:04:32,890 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:04:32,890 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 419 transitions. [2020-10-15 20:04:32,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:04:32,890 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:04:32,890 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:04:33,091 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable226 [2020-10-15 20:04:33,091 INFO L429 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:04:33,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:04:33,092 INFO L82 PathProgramCache]: Analyzing trace with hash -2145285195, now seen corresponding path program 194 times [2020-10-15 20:04:33,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:04:33,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606426317] [2020-10-15 20:04:33,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:04:33,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:04:33,336 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:04:33,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606426317] [2020-10-15 20:04:33,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301949073] [2020-10-15 20:04:33,336 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 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:04:33,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:04:33,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:04:33,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:04:33,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:04:33,879 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:04:33,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:04:33,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:04:33,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938852207] [2020-10-15 20:04:33,880 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:04:33,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:04:33,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:04:33,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:04:33,880 INFO L87 Difference]: Start difference. First operand 167 states and 419 transitions. Second operand 17 states. [2020-10-15 20:04:35,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:04:35,629 INFO L93 Difference]: Finished difference Result 265 states and 622 transitions. [2020-10-15 20:04:35,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 20:04:35,632 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:04:35,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:04:35,633 INFO L225 Difference]: With dead ends: 265 [2020-10-15 20:04:35,633 INFO L226 Difference]: Without dead ends: 263 [2020-10-15 20:04:35,633 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=361, Invalid=899, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 20:04:35,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2020-10-15 20:04:35,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 167. [2020-10-15 20:04:35,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-15 20:04:35,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 419 transitions. [2020-10-15 20:04:35,641 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 419 transitions. Word has length 14 [2020-10-15 20:04:35,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:04:35,641 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 419 transitions. [2020-10-15 20:04:35,641 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:04:35,641 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 419 transitions. [2020-10-15 20:04:35,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:04:35,642 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:04:35,642 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:04:35,842 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:04:35,843 INFO L429 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:04:35,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:04:35,843 INFO L82 PathProgramCache]: Analyzing trace with hash -2144622105, now seen corresponding path program 195 times [2020-10-15 20:04:35,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:04:35,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406085543] [2020-10-15 20:04:35,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:04:35,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:04:36,068 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:04:36,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406085543] [2020-10-15 20:04:36,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826650567] [2020-10-15 20:04:36,068 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 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:04:36,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 20:04:36,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:04:36,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:04:36,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:04:36,562 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:04:36,563 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:04:36,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:04:36,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534131401] [2020-10-15 20:04:36,563 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:04:36,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:04:36,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:04:36,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:04:36,564 INFO L87 Difference]: Start difference. First operand 167 states and 419 transitions. Second operand 17 states. [2020-10-15 20:04:38,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:04:38,705 INFO L93 Difference]: Finished difference Result 262 states and 627 transitions. [2020-10-15 20:04:38,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 20:04:38,707 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:04:38,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:04:38,707 INFO L225 Difference]: With dead ends: 262 [2020-10-15 20:04:38,707 INFO L226 Difference]: Without dead ends: 260 [2020-10-15 20:04:38,708 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=448, Invalid=1112, Unknown=0, NotChecked=0, Total=1560 [2020-10-15 20:04:38,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-10-15 20:04:38,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 169. [2020-10-15 20:04:38,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-15 20:04:38,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 426 transitions. [2020-10-15 20:04:38,711 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 426 transitions. Word has length 14 [2020-10-15 20:04:38,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:04:38,711 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 426 transitions. [2020-10-15 20:04:38,711 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:04:38,711 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 426 transitions. [2020-10-15 20:04:38,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:04:38,711 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:04:38,711 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:04:38,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2020-10-15 20:04:38,912 INFO L429 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:04:38,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:04:38,913 INFO L82 PathProgramCache]: Analyzing trace with hash -2144599785, now seen corresponding path program 196 times [2020-10-15 20:04:38,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:04:38,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197784172] [2020-10-15 20:04:38,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:04:38,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:04:39,139 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:04:39,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197784172] [2020-10-15 20:04:39,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096706084] [2020-10-15 20:04:39,140 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 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:04:39,182 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:04:39,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:04:39,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:04:39,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:04:39,589 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:04:39,659 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:04:39,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:04:39,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:04:39,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895346901] [2020-10-15 20:04:39,661 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:04:39,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:04:39,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:04:39,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:04:39,661 INFO L87 Difference]: Start difference. First operand 169 states and 426 transitions. Second operand 17 states. [2020-10-15 20:04:42,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:04:42,829 INFO L93 Difference]: Finished difference Result 285 states and 688 transitions. [2020-10-15 20:04:42,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 20:04:42,832 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:04:42,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:04:42,833 INFO L225 Difference]: With dead ends: 285 [2020-10-15 20:04:42,833 INFO L226 Difference]: Without dead ends: 280 [2020-10-15 20:04:42,834 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=587, Invalid=1393, Unknown=0, NotChecked=0, Total=1980 [2020-10-15 20:04:42,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-10-15 20:04:42,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 167. [2020-10-15 20:04:42,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-15 20:04:42,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 419 transitions. [2020-10-15 20:04:42,838 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 419 transitions. Word has length 14 [2020-10-15 20:04:42,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:04:42,838 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 419 transitions. [2020-10-15 20:04:42,838 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:04:42,838 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 419 transitions. [2020-10-15 20:04:42,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:04:42,838 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:04:42,838 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:04:43,039 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:04:43,039 INFO L429 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:04:43,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:04:43,040 INFO L82 PathProgramCache]: Analyzing trace with hash -2144570955, now seen corresponding path program 197 times [2020-10-15 20:04:43,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:04:43,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422861778] [2020-10-15 20:04:43,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:04:43,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:04:43,204 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:04:43,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422861778] [2020-10-15 20:04:43,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198837630] [2020-10-15 20:04:43,204 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 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:04:43,242 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 20:04:43,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:04:43,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:04:43,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:04:47,764 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:04:51,879 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 42 DAG size of output: 19 [2020-10-15 20:04:51,880 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:04:51,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:04:51,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-10-15 20:04:51,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664980147] [2020-10-15 20:04:51,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 20:04:51,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:04:51,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 20:04:51,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=220, Unknown=3, NotChecked=0, Total=306 [2020-10-15 20:04:51,882 INFO L87 Difference]: Start difference. First operand 167 states and 419 transitions. Second operand 18 states. [2020-10-15 20:04:56,121 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 54 DAG size of output: 38 [2020-10-15 20:04:56,677 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 16 [2020-10-15 20:05:00,978 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2020-10-15 20:05:01,339 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 23 [2020-10-15 20:05:04,571 WARN L193 SmtUtils]: Spent 728.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 22 [2020-10-15 20:05:06,904 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 32 [2020-10-15 20:05:32,384 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2020-10-15 20:06:24,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:06:24,252 INFO L93 Difference]: Finished difference Result 302 states and 718 transitions. [2020-10-15 20:06:24,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 20:06:24,256 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-10-15 20:06:24,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:06:24,257 INFO L225 Difference]: With dead ends: 302 [2020-10-15 20:06:24,257 INFO L226 Difference]: Without dead ends: 297 [2020-10-15 20:06:24,258 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 5 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 65.8s TimeCoverageRelationStatistics Valid=556, Invalid=1408, Unknown=16, NotChecked=0, Total=1980 [2020-10-15 20:06:24,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2020-10-15 20:06:24,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 166. [2020-10-15 20:06:24,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-15 20:06:24,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 414 transitions. [2020-10-15 20:06:24,262 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 414 transitions. Word has length 14 [2020-10-15 20:06:24,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:06:24,262 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 414 transitions. [2020-10-15 20:06:24,262 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 20:06:24,262 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 414 transitions. [2020-10-15 20:06:24,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:06:24,262 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:06:24,262 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:06:24,463 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,224 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:06:24,463 INFO L429 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:06:24,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:06:24,464 INFO L82 PathProgramCache]: Analyzing trace with hash -2143668793, now seen corresponding path program 198 times [2020-10-15 20:06:24,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:06:24,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746927771] [2020-10-15 20:06:24,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:06:24,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:06:24,739 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:24,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746927771] [2020-10-15 20:06:24,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072285278] [2020-10-15 20:06:24,739 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 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:06:24,783 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 20:06:24,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:06:24,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:06:24,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:06:25,233 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:25,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:06:25,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:06:25,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797052514] [2020-10-15 20:06:25,234 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:06:25,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:06:25,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:06:25,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:06:25,235 INFO L87 Difference]: Start difference. First operand 166 states and 414 transitions. Second operand 17 states. [2020-10-15 20:06:26,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:06:26,243 INFO L93 Difference]: Finished difference Result 219 states and 516 transitions. [2020-10-15 20:06:26,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 20:06:26,248 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:06:26,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:06:26,248 INFO L225 Difference]: With dead ends: 219 [2020-10-15 20:06:26,249 INFO L226 Difference]: Without dead ends: 217 [2020-10-15 20:06:26,249 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=214, Invalid=488, Unknown=0, NotChecked=0, Total=702 [2020-10-15 20:06:26,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-10-15 20:06:26,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 167. [2020-10-15 20:06:26,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-15 20:06:26,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 416 transitions. [2020-10-15 20:06:26,252 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 416 transitions. Word has length 14 [2020-10-15 20:06:26,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:06:26,252 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 416 transitions. [2020-10-15 20:06:26,253 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:06:26,253 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 416 transitions. [2020-10-15 20:06:26,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:06:26,253 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:06:26,253 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:06:26,456 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:06:26,456 INFO L429 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:06:26,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:06:26,457 INFO L82 PathProgramCache]: Analyzing trace with hash -2143646473, now seen corresponding path program 199 times [2020-10-15 20:06:26,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:06:26,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543789475] [2020-10-15 20:06:26,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:06:26,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:06:26,742 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:26,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543789475] [2020-10-15 20:06:26,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514633885] [2020-10-15 20:06:26,743 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 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:06:26,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:06:26,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:06:26,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:06:27,137 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:06:27,184 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:27,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:06:27,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:06:27,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787848864] [2020-10-15 20:06:27,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:06:27,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:06:27,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:06:27,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:06:27,186 INFO L87 Difference]: Start difference. First operand 167 states and 416 transitions. Second operand 17 states. [2020-10-15 20:06:28,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:06:28,316 INFO L93 Difference]: Finished difference Result 229 states and 538 transitions. [2020-10-15 20:06:28,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 20:06:28,320 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:06:28,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:06:28,320 INFO L225 Difference]: With dead ends: 229 [2020-10-15 20:06:28,321 INFO L226 Difference]: Without dead ends: 224 [2020-10-15 20:06:28,321 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=258, Invalid=554, Unknown=0, NotChecked=0, Total=812 [2020-10-15 20:06:28,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-10-15 20:06:28,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 158. [2020-10-15 20:06:28,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-15 20:06:28,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 386 transitions. [2020-10-15 20:06:28,325 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 386 transitions. Word has length 14 [2020-10-15 20:06:28,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:06:28,325 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 386 transitions. [2020-10-15 20:06:28,325 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:06:28,325 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 386 transitions. [2020-10-15 20:06:28,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:06:28,325 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:06:28,325 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:06:28,526 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2020-10-15 20:06:28,526 INFO L429 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:06:28,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:06:28,527 INFO L82 PathProgramCache]: Analyzing trace with hash -255670682, now seen corresponding path program 200 times [2020-10-15 20:06:28,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:06:28,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371021504] [2020-10-15 20:06:28,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:06:28,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:06:28,806 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:28,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371021504] [2020-10-15 20:06:28,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330524269] [2020-10-15 20:06:28,807 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 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:06:28,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:06:28,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:06:28,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:06:28,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:06:29,304 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:29,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:06:29,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:06:29,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238492172] [2020-10-15 20:06:29,306 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:06:29,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:06:29,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:06:29,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:06:29,306 INFO L87 Difference]: Start difference. First operand 158 states and 386 transitions. Second operand 17 states. [2020-10-15 20:06:30,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:06:30,107 INFO L93 Difference]: Finished difference Result 229 states and 528 transitions. [2020-10-15 20:06:30,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 20:06:30,110 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:06:30,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:06:30,111 INFO L225 Difference]: With dead ends: 229 [2020-10-15 20:06:30,111 INFO L226 Difference]: Without dead ends: 227 [2020-10-15 20:06:30,111 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2020-10-15 20:06:30,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-15 20:06:30,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 161. [2020-10-15 20:06:30,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-15 20:06:30,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 395 transitions. [2020-10-15 20:06:30,114 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 395 transitions. Word has length 14 [2020-10-15 20:06:30,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:06:30,114 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 395 transitions. [2020-10-15 20:06:30,114 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:06:30,114 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 395 transitions. [2020-10-15 20:06:30,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:06:30,114 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:06:30,114 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:06:30,315 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2020-10-15 20:06:30,316 INFO L429 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:06:30,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:06:30,316 INFO L82 PathProgramCache]: Analyzing trace with hash -255669721, now seen corresponding path program 201 times [2020-10-15 20:06:30,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:06:30,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310372485] [2020-10-15 20:06:30,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:06:30,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:06:30,617 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:30,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310372485] [2020-10-15 20:06:30,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160392058] [2020-10-15 20:06:30,618 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 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:06:30,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 20:06:30,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:06:30,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:06:30,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:06:31,013 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:31,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:06:31,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:06:31,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115868539] [2020-10-15 20:06:31,014 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:06:31,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:06:31,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:06:31,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:06:31,015 INFO L87 Difference]: Start difference. First operand 161 states and 395 transitions. Second operand 17 states. [2020-10-15 20:06:31,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:06:31,921 INFO L93 Difference]: Finished difference Result 237 states and 545 transitions. [2020-10-15 20:06:31,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 20:06:31,924 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:06:31,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:06:31,925 INFO L225 Difference]: With dead ends: 237 [2020-10-15 20:06:31,925 INFO L226 Difference]: Without dead ends: 235 [2020-10-15 20:06:31,925 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=195, Invalid=455, Unknown=0, NotChecked=0, Total=650 [2020-10-15 20:06:31,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-10-15 20:06:31,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 160. [2020-10-15 20:06:31,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-15 20:06:31,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 392 transitions. [2020-10-15 20:06:31,929 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 392 transitions. Word has length 14 [2020-10-15 20:06:31,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:06:31,929 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 392 transitions. [2020-10-15 20:06:31,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:06:31,929 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 392 transitions. [2020-10-15 20:06:31,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:06:31,930 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:06:31,930 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:06:32,137 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 228 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2020-10-15 20:06:32,137 INFO L429 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:06:32,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:06:32,138 INFO L82 PathProgramCache]: Analyzing trace with hash -255640891, now seen corresponding path program 202 times [2020-10-15 20:06:32,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:06:32,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544193447] [2020-10-15 20:06:32,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:06:32,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:06:32,429 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:32,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544193447] [2020-10-15 20:06:32,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413013572] [2020-10-15 20:06:32,430 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 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:06:32,473 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:06:32,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:06:32,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:06:32,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:06:33,413 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:33,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:06:33,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:06:33,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358819282] [2020-10-15 20:06:33,414 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:06:33,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:06:33,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:06:33,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:06:33,415 INFO L87 Difference]: Start difference. First operand 160 states and 392 transitions. Second operand 17 states. [2020-10-15 20:06:34,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:06:34,731 INFO L93 Difference]: Finished difference Result 246 states and 562 transitions. [2020-10-15 20:06:34,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 20:06:34,735 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:06:34,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:06:34,736 INFO L225 Difference]: With dead ends: 246 [2020-10-15 20:06:34,736 INFO L226 Difference]: Without dead ends: 244 [2020-10-15 20:06:34,736 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=254, Invalid=558, Unknown=0, NotChecked=0, Total=812 [2020-10-15 20:06:34,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-10-15 20:06:34,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 164. [2020-10-15 20:06:34,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-15 20:06:34,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 403 transitions. [2020-10-15 20:06:34,748 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 403 transitions. Word has length 14 [2020-10-15 20:06:34,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:06:34,748 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 403 transitions. [2020-10-15 20:06:34,748 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:06:34,748 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 403 transitions. [2020-10-15 20:06:34,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:06:34,748 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:06:34,748 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:06:34,949 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2020-10-15 20:06:34,949 INFO L429 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:06:34,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:06:34,950 INFO L82 PathProgramCache]: Analyzing trace with hash -254746200, now seen corresponding path program 203 times [2020-10-15 20:06:34,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:06:34,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394666461] [2020-10-15 20:06:34,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:06:34,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:06:35,230 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:35,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394666461] [2020-10-15 20:06:35,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353014905] [2020-10-15 20:06:35,231 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 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:06:35,273 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 20:06:35,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:06:35,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:06:35,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:06:35,750 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:35,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:06:35,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:06:35,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567798002] [2020-10-15 20:06:35,751 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:06:35,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:06:35,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:06:35,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:06:35,752 INFO L87 Difference]: Start difference. First operand 164 states and 403 transitions. Second operand 17 states. [2020-10-15 20:06:36,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:06:36,730 INFO L93 Difference]: Finished difference Result 245 states and 560 transitions. [2020-10-15 20:06:36,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 20:06:36,734 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:06:36,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:06:36,735 INFO L225 Difference]: With dead ends: 245 [2020-10-15 20:06:36,735 INFO L226 Difference]: Without dead ends: 243 [2020-10-15 20:06:36,736 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=222, Invalid=480, Unknown=0, NotChecked=0, Total=702 [2020-10-15 20:06:36,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-10-15 20:06:36,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 163. [2020-10-15 20:06:36,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 20:06:36,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 399 transitions. [2020-10-15 20:06:36,739 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 399 transitions. Word has length 14 [2020-10-15 20:06:36,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:06:36,739 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 399 transitions. [2020-10-15 20:06:36,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:06:36,739 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 399 transitions. [2020-10-15 20:06:36,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:06:36,740 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:06:36,740 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:06:36,940 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2020-10-15 20:06:36,941 INFO L429 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:06:36,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:06:36,941 INFO L82 PathProgramCache]: Analyzing trace with hash -227041531, now seen corresponding path program 204 times [2020-10-15 20:06:36,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:06:36,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294406769] [2020-10-15 20:06:36,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:06:36,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:06:37,251 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:37,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294406769] [2020-10-15 20:06:37,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359842083] [2020-10-15 20:06:37,252 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 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:06:37,293 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 20:06:37,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:06:37,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:06:37,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:06:37,725 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:37,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:06:37,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:06:37,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749125724] [2020-10-15 20:06:37,726 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:06:37,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:06:37,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:06:37,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:06:37,726 INFO L87 Difference]: Start difference. First operand 163 states and 399 transitions. Second operand 17 states. [2020-10-15 20:06:38,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:06:38,499 INFO L93 Difference]: Finished difference Result 239 states and 549 transitions. [2020-10-15 20:06:38,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 20:06:38,502 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:06:38,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:06:38,503 INFO L225 Difference]: With dead ends: 239 [2020-10-15 20:06:38,503 INFO L226 Difference]: Without dead ends: 237 [2020-10-15 20:06:38,504 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=186, Invalid=414, Unknown=0, NotChecked=0, Total=600 [2020-10-15 20:06:38,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-10-15 20:06:38,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 162. [2020-10-15 20:06:38,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-15 20:06:38,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 396 transitions. [2020-10-15 20:06:38,507 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 396 transitions. Word has length 14 [2020-10-15 20:06:38,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:06:38,508 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 396 transitions. [2020-10-15 20:06:38,508 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:06:38,508 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 396 transitions. [2020-10-15 20:06:38,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:06:38,508 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:06:38,508 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:06:38,709 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable237 [2020-10-15 20:06:38,709 INFO L429 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:06:38,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:06:38,710 INFO L82 PathProgramCache]: Analyzing trace with hash -226088219, now seen corresponding path program 205 times [2020-10-15 20:06:38,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:06:38,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613699575] [2020-10-15 20:06:38,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:06:38,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:06:39,074 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:39,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613699575] [2020-10-15 20:06:39,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357194229] [2020-10-15 20:06:39,075 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 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:06:39,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:06:39,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:06:39,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:06:39,552 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:39,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:06:39,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:06:39,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146915452] [2020-10-15 20:06:39,553 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:06:39,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:06:39,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:06:39,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:06:39,554 INFO L87 Difference]: Start difference. First operand 162 states and 396 transitions. Second operand 17 states. [2020-10-15 20:06:40,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:06:40,128 INFO L93 Difference]: Finished difference Result 220 states and 508 transitions. [2020-10-15 20:06:40,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 20:06:40,130 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:06:40,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:06:40,130 INFO L225 Difference]: With dead ends: 220 [2020-10-15 20:06:40,130 INFO L226 Difference]: Without dead ends: 218 [2020-10-15 20:06:40,131 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-10-15 20:06:40,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-10-15 20:06:40,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 156. [2020-10-15 20:06:40,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-15 20:06:40,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 381 transitions. [2020-10-15 20:06:40,134 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 381 transitions. Word has length 14 [2020-10-15 20:06:40,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:06:40,134 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 381 transitions. [2020-10-15 20:06:40,134 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:06:40,134 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 381 transitions. [2020-10-15 20:06:40,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:06:40,135 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:06:40,135 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:06:40,335 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2020-10-15 20:06:40,336 INFO L429 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:06:40,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:06:40,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1976392972, now seen corresponding path program 206 times [2020-10-15 20:06:40,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:06:40,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690068832] [2020-10-15 20:06:40,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:06:40,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:06:40,545 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:40,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690068832] [2020-10-15 20:06:40,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320899584] [2020-10-15 20:06:40,546 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 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:06:40,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:06:40,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:06:40,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:06:40,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:06:41,012 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:41,013 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:06:41,013 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:06:41,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905423800] [2020-10-15 20:06:41,013 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:06:41,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:06:41,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:06:41,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:06:41,014 INFO L87 Difference]: Start difference. First operand 156 states and 381 transitions. Second operand 17 states. [2020-10-15 20:06:41,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:06:41,840 INFO L93 Difference]: Finished difference Result 229 states and 528 transitions. [2020-10-15 20:06:41,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 20:06:41,843 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:06:41,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:06:41,844 INFO L225 Difference]: With dead ends: 229 [2020-10-15 20:06:41,844 INFO L226 Difference]: Without dead ends: 227 [2020-10-15 20:06:41,845 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=178, Invalid=472, Unknown=0, NotChecked=0, Total=650 [2020-10-15 20:06:41,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-15 20:06:41,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 160. [2020-10-15 20:06:41,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-15 20:06:41,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 395 transitions. [2020-10-15 20:06:41,849 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 395 transitions. Word has length 14 [2020-10-15 20:06:41,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:06:41,849 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 395 transitions. [2020-10-15 20:06:41,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:06:41,849 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 395 transitions. [2020-10-15 20:06:41,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:06:41,849 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:06:41,849 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:06:42,052 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2020-10-15 20:06:42,053 INFO L429 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:06:42,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:06:42,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1976392011, now seen corresponding path program 207 times [2020-10-15 20:06:42,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:06:42,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709865484] [2020-10-15 20:06:42,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:06:42,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:06:42,253 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:42,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709865484] [2020-10-15 20:06:42,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166367972] [2020-10-15 20:06:42,254 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 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:06:42,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 20:06:42,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:06:42,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:06:42,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:06:42,789 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:42,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:06:42,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:06:42,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499382194] [2020-10-15 20:06:42,790 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:06:42,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:06:42,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:06:42,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:06:42,790 INFO L87 Difference]: Start difference. First operand 160 states and 395 transitions. Second operand 17 states. [2020-10-15 20:06:43,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:06:43,724 INFO L93 Difference]: Finished difference Result 233 states and 536 transitions. [2020-10-15 20:06:43,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 20:06:43,728 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:06:43,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:06:43,728 INFO L225 Difference]: With dead ends: 233 [2020-10-15 20:06:43,728 INFO L226 Difference]: Without dead ends: 231 [2020-10-15 20:06:43,729 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=174, Invalid=476, Unknown=0, NotChecked=0, Total=650 [2020-10-15 20:06:43,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-10-15 20:06:43,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 159. [2020-10-15 20:06:43,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-15 20:06:43,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 392 transitions. [2020-10-15 20:06:43,732 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 392 transitions. Word has length 14 [2020-10-15 20:06:43,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:06:43,733 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 392 transitions. [2020-10-15 20:06:43,733 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:06:43,733 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 392 transitions. [2020-10-15 20:06:43,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:06:43,733 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:06:43,733 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:06:43,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:06:43,934 INFO L429 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:06:43,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:06:43,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1976363181, now seen corresponding path program 208 times [2020-10-15 20:06:43,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:06:43,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414904705] [2020-10-15 20:06:43,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:06:43,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:06:44,172 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:44,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414904705] [2020-10-15 20:06:44,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215388364] [2020-10-15 20:06:44,173 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 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:06:44,215 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:06:44,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:06:44,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:06:44,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:06:46,888 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:46,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:06:46,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:06:46,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935803003] [2020-10-15 20:06:46,889 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:06:46,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:06:46,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:06:46,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:06:46,889 INFO L87 Difference]: Start difference. First operand 159 states and 392 transitions. Second operand 17 states. [2020-10-15 20:06:47,598 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 24 [2020-10-15 20:06:48,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:06:48,610 INFO L93 Difference]: Finished difference Result 256 states and 582 transitions. [2020-10-15 20:06:48,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 20:06:48,622 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:06:48,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:06:48,623 INFO L225 Difference]: With dead ends: 256 [2020-10-15 20:06:48,623 INFO L226 Difference]: Without dead ends: 254 [2020-10-15 20:06:48,623 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=259, Invalid=671, Unknown=0, NotChecked=0, Total=930 [2020-10-15 20:06:48,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-10-15 20:06:48,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 163. [2020-10-15 20:06:48,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 20:06:48,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 403 transitions. [2020-10-15 20:06:48,626 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 403 transitions. Word has length 14 [2020-10-15 20:06:48,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:06:48,626 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 403 transitions. [2020-10-15 20:06:48,626 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:06:48,626 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 403 transitions. [2020-10-15 20:06:48,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:06:48,627 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:06:48,627 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:06:48,827 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,235 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:06:48,828 INFO L429 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:06:48,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:06:48,829 INFO L82 PathProgramCache]: Analyzing trace with hash -1975468490, now seen corresponding path program 209 times [2020-10-15 20:06:48,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:06:48,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329189602] [2020-10-15 20:06:48,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:06:48,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:06:49,098 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:49,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329189602] [2020-10-15 20:06:49,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19093935] [2020-10-15 20:06:49,099 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 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:06:49,143 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 20:06:49,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:06:49,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:06:49,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:06:49,631 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:49,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:06:49,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:06:49,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695747438] [2020-10-15 20:06:49,632 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:06:49,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:06:49,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:06:49,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:06:49,633 INFO L87 Difference]: Start difference. First operand 163 states and 403 transitions. Second operand 17 states. [2020-10-15 20:06:50,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:06:50,826 INFO L93 Difference]: Finished difference Result 246 states and 562 transitions. [2020-10-15 20:06:50,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 20:06:50,830 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:06:50,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:06:50,831 INFO L225 Difference]: With dead ends: 246 [2020-10-15 20:06:50,831 INFO L226 Difference]: Without dead ends: 244 [2020-10-15 20:06:50,831 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=220, Invalid=592, Unknown=0, NotChecked=0, Total=812 [2020-10-15 20:06:50,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-10-15 20:06:50,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 162. [2020-10-15 20:06:50,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-15 20:06:50,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 399 transitions. [2020-10-15 20:06:50,834 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 399 transitions. Word has length 14 [2020-10-15 20:06:50,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:06:50,834 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 399 transitions. [2020-10-15 20:06:50,834 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:06:50,834 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 399 transitions. [2020-10-15 20:06:50,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:06:50,835 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:06:50,835 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:06:51,035 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:06:51,036 INFO L429 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:06:51,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:06:51,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1339163482, now seen corresponding path program 210 times [2020-10-15 20:06:51,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:06:51,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773980558] [2020-10-15 20:06:51,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:06:51,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:06:51,281 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:51,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773980558] [2020-10-15 20:06:51,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795762311] [2020-10-15 20:06:51,282 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 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:06:51,325 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-15 20:06:51,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:06:51,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:06:51,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:06:51,786 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:51,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:06:51,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:06:51,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011802353] [2020-10-15 20:06:51,787 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:06:51,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:06:51,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:06:51,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:06:51,788 INFO L87 Difference]: Start difference. First operand 162 states and 399 transitions. Second operand 17 states. [2020-10-15 20:06:52,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:06:52,822 INFO L93 Difference]: Finished difference Result 250 states and 575 transitions. [2020-10-15 20:06:52,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 20:06:52,824 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:06:52,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:06:52,824 INFO L225 Difference]: With dead ends: 250 [2020-10-15 20:06:52,825 INFO L226 Difference]: Without dead ends: 248 [2020-10-15 20:06:52,825 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=258, Invalid=672, Unknown=0, NotChecked=0, Total=930 [2020-10-15 20:06:52,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-10-15 20:06:52,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 164. [2020-10-15 20:06:52,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-15 20:06:52,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 407 transitions. [2020-10-15 20:06:52,828 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 407 transitions. Word has length 14 [2020-10-15 20:06:52,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:06:52,828 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 407 transitions. [2020-10-15 20:06:52,828 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:06:52,828 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 407 transitions. [2020-10-15 20:06:52,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:06:52,829 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:06:52,829 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:06:53,029 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2020-10-15 20:06:53,030 INFO L429 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:06:53,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:06:53,030 INFO L82 PathProgramCache]: Analyzing trace with hash -1339162521, now seen corresponding path program 211 times [2020-10-15 20:06:53,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:06:53,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594119224] [2020-10-15 20:06:53,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:06:53,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:06:53,274 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:53,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594119224] [2020-10-15 20:06:53,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519682440] [2020-10-15 20:06:53,275 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 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:06:53,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:06:53,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:06:53,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:06:53,794 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:53,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:06:53,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:06:53,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476296700] [2020-10-15 20:06:53,795 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:06:53,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:06:53,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:06:53,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:06:53,795 INFO L87 Difference]: Start difference. First operand 164 states and 407 transitions. Second operand 17 states. [2020-10-15 20:06:54,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:06:54,919 INFO L93 Difference]: Finished difference Result 245 states and 564 transitions. [2020-10-15 20:06:54,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 20:06:54,922 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:06:54,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:06:54,922 INFO L225 Difference]: With dead ends: 245 [2020-10-15 20:06:54,922 INFO L226 Difference]: Without dead ends: 243 [2020-10-15 20:06:54,923 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=220, Invalid=592, Unknown=0, NotChecked=0, Total=812 [2020-10-15 20:06:54,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-10-15 20:06:54,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 164. [2020-10-15 20:06:54,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-15 20:06:54,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 407 transitions. [2020-10-15 20:06:54,926 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 407 transitions. Word has length 14 [2020-10-15 20:06:54,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:06:54,926 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 407 transitions. [2020-10-15 20:06:54,926 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:06:54,926 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 407 transitions. [2020-10-15 20:06:54,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:06:54,927 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:06:54,927 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:06:55,127 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable244,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:06:55,128 INFO L429 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:06:55,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:06:55,128 INFO L82 PathProgramCache]: Analyzing trace with hash -1339133691, now seen corresponding path program 212 times [2020-10-15 20:06:55,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:06:55,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944519996] [2020-10-15 20:06:55,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:06:55,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:06:55,339 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:55,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944519996] [2020-10-15 20:06:55,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606471827] [2020-10-15 20:06:55,339 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 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:06:55,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:06:55,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:06:55,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:06:55,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:06:55,860 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:55,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:06:55,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:06:55,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714587512] [2020-10-15 20:06:55,861 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:06:55,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:06:55,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:06:55,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:06:55,861 INFO L87 Difference]: Start difference. First operand 164 states and 407 transitions. Second operand 17 states. [2020-10-15 20:06:57,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:06:57,502 INFO L93 Difference]: Finished difference Result 262 states and 602 transitions. [2020-10-15 20:06:57,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 20:06:57,505 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:06:57,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:06:57,506 INFO L225 Difference]: With dead ends: 262 [2020-10-15 20:06:57,506 INFO L226 Difference]: Without dead ends: 260 [2020-10-15 20:06:57,507 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=305, Invalid=817, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 20:06:57,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-10-15 20:06:57,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 165. [2020-10-15 20:06:57,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-15 20:06:57,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 411 transitions. [2020-10-15 20:06:57,510 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 411 transitions. Word has length 14 [2020-10-15 20:06:57,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:06:57,510 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 411 transitions. [2020-10-15 20:06:57,510 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:06:57,511 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 411 transitions. [2020-10-15 20:06:57,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:06:57,511 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:06:57,511 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:06:57,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2020-10-15 20:06:57,712 INFO L429 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:06:57,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:06:57,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1318607692, now seen corresponding path program 213 times [2020-10-15 20:06:57,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:06:57,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111688549] [2020-10-15 20:06:57,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:06:57,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:06:57,977 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:57,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111688549] [2020-10-15 20:06:57,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032289793] [2020-10-15 20:06:57,978 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 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:06:58,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-15 20:06:58,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:06:58,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:06:58,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:06:58,488 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:58,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:06:58,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:06:58,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605656887] [2020-10-15 20:06:58,490 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:06:58,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:06:58,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:06:58,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:06:58,490 INFO L87 Difference]: Start difference. First operand 165 states and 411 transitions. Second operand 17 states. [2020-10-15 20:07:00,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:07:00,038 INFO L93 Difference]: Finished difference Result 254 states and 594 transitions. [2020-10-15 20:07:00,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 20:07:00,043 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:07:00,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:07:00,044 INFO L225 Difference]: With dead ends: 254 [2020-10-15 20:07:00,044 INFO L226 Difference]: Without dead ends: 252 [2020-10-15 20:07:00,045 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=303, Invalid=753, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 20:07:00,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-10-15 20:07:00,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 166. [2020-10-15 20:07:00,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-15 20:07:00,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 416 transitions. [2020-10-15 20:07:00,048 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 416 transitions. Word has length 14 [2020-10-15 20:07:00,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:07:00,048 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 416 transitions. [2020-10-15 20:07:00,048 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:07:00,048 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 416 transitions. [2020-10-15 20:07:00,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:07:00,048 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:07:00,048 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:07:00,249 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2020-10-15 20:07:00,249 INFO L429 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:07:00,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:07:00,250 INFO L82 PathProgramCache]: Analyzing trace with hash -1318606731, now seen corresponding path program 214 times [2020-10-15 20:07:00,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:07:00,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124828620] [2020-10-15 20:07:00,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:07:00,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:07:00,533 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:07:00,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124828620] [2020-10-15 20:07:00,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517879934] [2020-10-15 20:07:00,534 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 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:07:00,583 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:07:00,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:07:00,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:07:00,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:07:01,086 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:07:01,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:07:01,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:07:01,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761876213] [2020-10-15 20:07:01,088 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:07:01,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:07:01,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:07:01,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:07:01,088 INFO L87 Difference]: Start difference. First operand 166 states and 416 transitions. Second operand 17 states. [2020-10-15 20:07:02,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:07:02,595 INFO L93 Difference]: Finished difference Result 248 states and 576 transitions. [2020-10-15 20:07:02,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 20:07:02,599 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:07:02,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:07:02,600 INFO L225 Difference]: With dead ends: 248 [2020-10-15 20:07:02,600 INFO L226 Difference]: Without dead ends: 246 [2020-10-15 20:07:02,601 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=277, Invalid=715, Unknown=0, NotChecked=0, Total=992 [2020-10-15 20:07:02,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-10-15 20:07:02,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 167. [2020-10-15 20:07:02,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-15 20:07:02,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 418 transitions. [2020-10-15 20:07:02,605 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 418 transitions. Word has length 14 [2020-10-15 20:07:02,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:07:02,605 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 418 transitions. [2020-10-15 20:07:02,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:07:02,605 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 418 transitions. [2020-10-15 20:07:02,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:07:02,605 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:07:02,605 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:07:02,806 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:07:02,806 INFO L429 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:07:02,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:07:02,807 INFO L82 PathProgramCache]: Analyzing trace with hash -1317944602, now seen corresponding path program 215 times [2020-10-15 20:07:02,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:07:02,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080440885] [2020-10-15 20:07:02,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:07:02,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:07:03,076 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:07:03,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080440885] [2020-10-15 20:07:03,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679878179] [2020-10-15 20:07:03,076 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:07:03,119 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-15 20:07:03,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:07:03,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:07:03,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:07:03,583 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:07:03,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:07:03,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:07:03,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904718668] [2020-10-15 20:07:03,584 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:07:03,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:07:03,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:07:03,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:07:03,584 INFO L87 Difference]: Start difference. First operand 167 states and 418 transitions. Second operand 17 states. [2020-10-15 20:07:05,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:07:05,216 INFO L93 Difference]: Finished difference Result 245 states and 579 transitions. [2020-10-15 20:07:05,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 20:07:05,220 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:07:05,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:07:05,221 INFO L225 Difference]: With dead ends: 245 [2020-10-15 20:07:05,221 INFO L226 Difference]: Without dead ends: 243 [2020-10-15 20:07:05,221 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=324, Invalid=798, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 20:07:05,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-10-15 20:07:05,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 169. [2020-10-15 20:07:05,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-15 20:07:05,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 425 transitions. [2020-10-15 20:07:05,226 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 425 transitions. Word has length 14 [2020-10-15 20:07:05,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:07:05,226 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 425 transitions. [2020-10-15 20:07:05,226 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:07:05,226 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 425 transitions. [2020-10-15 20:07:05,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:07:05,227 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:07:05,227 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:07:05,437 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable248,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:07:05,438 INFO L429 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:07:05,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:07:05,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1317923243, now seen corresponding path program 216 times [2020-10-15 20:07:05,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:07:05,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116302742] [2020-10-15 20:07:05,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:07:05,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:07:05,700 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:07:05,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116302742] [2020-10-15 20:07:05,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641369565] [2020-10-15 20:07:05,701 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:07:05,743 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 20:07:05,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:07:05,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:07:05,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:07:06,079 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:07:06,111 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:07:06,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:07:06,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:07:06,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44742433] [2020-10-15 20:07:06,112 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:07:06,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:07:06,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:07:06,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:07:06,113 INFO L87 Difference]: Start difference. First operand 169 states and 425 transitions. Second operand 17 states. [2020-10-15 20:07:07,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:07:07,177 INFO L93 Difference]: Finished difference Result 223 states and 540 transitions. [2020-10-15 20:07:07,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 20:07:07,182 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:07:07,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:07:07,182 INFO L225 Difference]: With dead ends: 223 [2020-10-15 20:07:07,182 INFO L226 Difference]: Without dead ends: 218 [2020-10-15 20:07:07,183 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=258, Invalid=554, Unknown=0, NotChecked=0, Total=812 [2020-10-15 20:07:07,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-10-15 20:07:07,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 169. [2020-10-15 20:07:07,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-15 20:07:07,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 425 transitions. [2020-10-15 20:07:07,187 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 425 transitions. Word has length 14 [2020-10-15 20:07:07,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:07:07,187 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 425 transitions. [2020-10-15 20:07:07,187 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:07:07,187 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 425 transitions. [2020-10-15 20:07:07,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:07:07,188 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:07:07,188 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:07:07,388 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2020-10-15 20:07:07,389 INFO L429 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:07:07,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:07:07,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1317922282, now seen corresponding path program 217 times [2020-10-15 20:07:07,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:07:07,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427445205] [2020-10-15 20:07:07,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:07:07,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:07:07,687 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:07:07,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427445205] [2020-10-15 20:07:07,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091462868] [2020-10-15 20:07:07,688 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 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:07:07,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:07:07,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:07:07,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:07:08,165 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:07:08,285 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:07:08,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:07:08,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:07:08,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507822792] [2020-10-15 20:07:08,286 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:07:08,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:07:08,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:07:08,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:07:08,287 INFO L87 Difference]: Start difference. First operand 169 states and 425 transitions. Second operand 17 states. [2020-10-15 20:07:09,487 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2020-10-15 20:07:10,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:07:10,559 INFO L93 Difference]: Finished difference Result 286 states and 679 transitions. [2020-10-15 20:07:10,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 20:07:10,564 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:07:10,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:07:10,565 INFO L225 Difference]: With dead ends: 286 [2020-10-15 20:07:10,565 INFO L226 Difference]: Without dead ends: 281 [2020-10-15 20:07:10,565 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=384, Invalid=948, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 20:07:10,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2020-10-15 20:07:10,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 167. [2020-10-15 20:07:10,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-15 20:07:10,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 418 transitions. [2020-10-15 20:07:10,569 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 418 transitions. Word has length 14 [2020-10-15 20:07:10,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:07:10,569 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 418 transitions. [2020-10-15 20:07:10,569 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:07:10,569 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 418 transitions. [2020-10-15 20:07:10,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:07:10,570 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:07:10,570 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:07:10,770 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:07:10,771 INFO L429 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:07:10,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:07:10,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1317914811, now seen corresponding path program 218 times [2020-10-15 20:07:10,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:07:10,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226216734] [2020-10-15 20:07:10,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:07:10,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:07:11,052 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:07:11,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226216734] [2020-10-15 20:07:11,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317175600] [2020-10-15 20:07:11,053 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 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:07:11,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:07:11,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:07:11,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:07:11,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:07:11,647 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:07:11,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:07:11,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:07:11,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321275425] [2020-10-15 20:07:11,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:07:11,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:07:11,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:07:11,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:07:11,648 INFO L87 Difference]: Start difference. First operand 167 states and 418 transitions. Second operand 17 states. [2020-10-15 20:07:12,288 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 17 [2020-10-15 20:07:13,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:07:13,772 INFO L93 Difference]: Finished difference Result 268 states and 630 transitions. [2020-10-15 20:07:13,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-15 20:07:13,777 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:07:13,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:07:13,778 INFO L225 Difference]: With dead ends: 268 [2020-10-15 20:07:13,778 INFO L226 Difference]: Without dead ends: 266 [2020-10-15 20:07:13,778 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=335, Invalid=855, Unknown=0, NotChecked=0, Total=1190 [2020-10-15 20:07:13,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-10-15 20:07:13,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 169. [2020-10-15 20:07:13,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-15 20:07:13,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 425 transitions. [2020-10-15 20:07:13,782 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 425 transitions. Word has length 14 [2020-10-15 20:07:13,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:07:13,782 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 425 transitions. [2020-10-15 20:07:13,782 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:07:13,782 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 425 transitions. [2020-10-15 20:07:13,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:07:13,782 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:07:13,782 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:07:13,983 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable251 [2020-10-15 20:07:13,983 INFO L429 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:07:13,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:07:13,984 INFO L82 PathProgramCache]: Analyzing trace with hash -1317893452, now seen corresponding path program 219 times [2020-10-15 20:07:13,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:07:13,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836374946] [2020-10-15 20:07:13,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:07:13,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:07:14,253 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:07:14,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836374946] [2020-10-15 20:07:14,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098247430] [2020-10-15 20:07:14,254 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 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:07:14,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 20:07:14,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:07:14,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:07:14,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:07:14,688 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:07:14,773 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:07:14,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:07:14,774 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:07:14,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258201668] [2020-10-15 20:07:14,774 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:07:14,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:07:14,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:07:14,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:07:14,774 INFO L87 Difference]: Start difference. First operand 169 states and 425 transitions. Second operand 17 states. [2020-10-15 20:07:17,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:07:17,011 INFO L93 Difference]: Finished difference Result 296 states and 707 transitions. [2020-10-15 20:07:17,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 20:07:17,014 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:07:17,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:07:17,015 INFO L225 Difference]: With dead ends: 296 [2020-10-15 20:07:17,015 INFO L226 Difference]: Without dead ends: 291 [2020-10-15 20:07:17,015 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=419, Invalid=987, Unknown=0, NotChecked=0, Total=1406 [2020-10-15 20:07:17,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-10-15 20:07:17,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 169. [2020-10-15 20:07:17,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-15 20:07:17,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 425 transitions. [2020-10-15 20:07:17,019 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 425 transitions. Word has length 14 [2020-10-15 20:07:17,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:07:17,019 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 425 transitions. [2020-10-15 20:07:17,019 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:07:17,019 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 425 transitions. [2020-10-15 20:07:17,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:07:17,019 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:07:17,019 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:07:17,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:07:17,221 INFO L429 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:07:17,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:07:17,221 INFO L82 PathProgramCache]: Analyzing trace with hash -1317892491, now seen corresponding path program 220 times [2020-10-15 20:07:17,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:07:17,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112704250] [2020-10-15 20:07:17,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:07:17,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:07:17,447 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:07:17,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112704250] [2020-10-15 20:07:17,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461718541] [2020-10-15 20:07:17,448 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 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:07:17,489 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:07:17,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:07:17,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:07:17,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:07:17,832 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:07:17,878 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:07:17,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:07:17,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:07:17,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648817847] [2020-10-15 20:07:17,879 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:07:17,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:07:17,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:07:17,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:07:17,880 INFO L87 Difference]: Start difference. First operand 169 states and 425 transitions. Second operand 17 states. [2020-10-15 20:07:20,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:07:20,011 INFO L93 Difference]: Finished difference Result 299 states and 710 transitions. [2020-10-15 20:07:20,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 20:07:20,015 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:07:20,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:07:20,016 INFO L225 Difference]: With dead ends: 299 [2020-10-15 20:07:20,016 INFO L226 Difference]: Without dead ends: 294 [2020-10-15 20:07:20,017 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=476, Invalid=1084, Unknown=0, NotChecked=0, Total=1560 [2020-10-15 20:07:20,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2020-10-15 20:07:20,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 165. [2020-10-15 20:07:20,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-15 20:07:20,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 411 transitions. [2020-10-15 20:07:20,022 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 411 transitions. Word has length 14 [2020-10-15 20:07:20,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:07:20,022 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 411 transitions. [2020-10-15 20:07:20,022 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:07:20,022 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 411 transitions. [2020-10-15 20:07:20,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:07:20,023 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:07:20,023 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:07:20,233 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:07:20,234 INFO L429 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:07:20,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:07:20,235 INFO L82 PathProgramCache]: Analyzing trace with hash -1317684171, now seen corresponding path program 221 times [2020-10-15 20:07:20,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:07:20,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103209082] [2020-10-15 20:07:20,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:07:20,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:07:20,518 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:07:20,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103209082] [2020-10-15 20:07:20,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608101192] [2020-10-15 20:07:20,519 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 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:07:20,568 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 20:07:20,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:07:20,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:07:20,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:07:21,263 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:07:21,264 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:07:21,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:07:21,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441862886] [2020-10-15 20:07:21,264 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:07:21,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:07:21,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:07:21,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:07:21,265 INFO L87 Difference]: Start difference. First operand 165 states and 411 transitions. Second operand 17 states. [2020-10-15 20:07:23,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:07:23,008 INFO L93 Difference]: Finished difference Result 274 states and 633 transitions. [2020-10-15 20:07:23,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 20:07:23,010 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:07:23,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:07:23,011 INFO L225 Difference]: With dead ends: 274 [2020-10-15 20:07:23,011 INFO L226 Difference]: Without dead ends: 272 [2020-10-15 20:07:23,011 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=358, Invalid=902, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 20:07:23,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2020-10-15 20:07:23,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 169. [2020-10-15 20:07:23,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-15 20:07:23,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 426 transitions. [2020-10-15 20:07:23,015 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 426 transitions. Word has length 14 [2020-10-15 20:07:23,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:07:23,015 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 426 transitions. [2020-10-15 20:07:23,015 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:07:23,015 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 426 transitions. [2020-10-15 20:07:23,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:07:23,015 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:07:23,016 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:07:23,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable254,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:07:23,221 INFO L429 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:07:23,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:07:23,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1317021081, now seen corresponding path program 222 times [2020-10-15 20:07:23,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:07:23,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722926569] [2020-10-15 20:07:23,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:07:23,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:07:23,420 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:07:23,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722926569] [2020-10-15 20:07:23,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464768352] [2020-10-15 20:07:23,421 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 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:07:23,459 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 20:07:23,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:07:23,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:07:23,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:07:23,941 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:07:23,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:07:23,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:07:23,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828979959] [2020-10-15 20:07:23,942 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:07:23,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:07:23,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:07:23,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:07:23,942 INFO L87 Difference]: Start difference. First operand 169 states and 426 transitions. Second operand 17 states. Received shutdown request... [2020-10-15 20:07:24,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 20:07:25,087 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2020-10-15 20:07:25,088 WARN L546 AbstractCegarLoop]: Verification canceled [2020-10-15 20:07:25,093 WARN L235 ceAbstractionStarter]: Timeout [2020-10-15 20:07:25,093 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 08:07:25 BasicIcfg [2020-10-15 20:07:25,093 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-15 20:07:25,095 INFO L168 Benchmark]: Toolchain (without parser) took 867555.02 ms. Allocated memory was 253.8 MB in the beginning and 232.8 MB in the end (delta: -21.0 MB). Free memory was 209.1 MB in the beginning and 183.5 MB in the end (delta: 25.6 MB). Peak memory consumption was 4.6 MB. Max. memory is 14.2 GB. [2020-10-15 20:07:25,095 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 253.8 MB. Free memory is still 230.1 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-15 20:07:25,095 INFO L168 Benchmark]: CACSL2BoogieTranslator took 661.50 ms. Allocated memory was 253.8 MB in the beginning and 321.9 MB in the end (delta: 68.2 MB). Free memory was 209.1 MB in the beginning and 277.3 MB in the end (delta: -68.2 MB). Peak memory consumption was 32.8 MB. Max. memory is 14.2 GB. [2020-10-15 20:07:25,096 INFO L168 Benchmark]: Boogie Procedure Inliner took 48.15 ms. Allocated memory is still 321.9 MB. Free memory is still 277.3 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-15 20:07:25,096 INFO L168 Benchmark]: Boogie Preprocessor took 24.79 ms. Allocated memory is still 321.9 MB. Free memory was 277.3 MB in the beginning and 274.8 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-15 20:07:25,096 INFO L168 Benchmark]: RCFGBuilder took 355.25 ms. Allocated memory is still 321.9 MB. Free memory was 274.8 MB in the beginning and 252.7 MB in the end (delta: 22.1 MB). Peak memory consumption was 22.1 MB. Max. memory is 14.2 GB. [2020-10-15 20:07:25,096 INFO L168 Benchmark]: TraceAbstraction took 866459.79 ms. Allocated memory was 321.9 MB in the beginning and 232.8 MB in the end (delta: -89.1 MB). Free memory was 252.7 MB in the beginning and 183.5 MB in the end (delta: 69.2 MB). There was no memory consumed. Max. memory is 14.2 GB. [2020-10-15 20:07:25,098 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 253.8 MB. Free memory is still 230.1 MB. There was no memory consumed. Max. memory is 14.2 GB. * CACSL2BoogieTranslator took 661.50 ms. Allocated memory was 253.8 MB in the beginning and 321.9 MB in the end (delta: 68.2 MB). Free memory was 209.1 MB in the beginning and 277.3 MB in the end (delta: -68.2 MB). Peak memory consumption was 32.8 MB. Max. memory is 14.2 GB. * Boogie Procedure Inliner took 48.15 ms. Allocated memory is still 321.9 MB. Free memory is still 277.3 MB. There was no memory consumed. Max. memory is 14.2 GB. * Boogie Preprocessor took 24.79 ms. Allocated memory is still 321.9 MB. Free memory was 277.3 MB in the beginning and 274.8 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * RCFGBuilder took 355.25 ms. Allocated memory is still 321.9 MB. Free memory was 274.8 MB in the beginning and 252.7 MB in the end (delta: 22.1 MB). Peak memory consumption was 22.1 MB. Max. memory is 14.2 GB. * TraceAbstraction took 866459.79 ms. Allocated memory was 321.9 MB in the beginning and 232.8 MB in the end (delta: -89.1 MB). Free memory was 252.7 MB in the beginning and 183.5 MB in the end (delta: 69.2 MB). There was no memory consumed. Max. memory is 14.2 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 721 VarBasedMoverChecksPositive, 19 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 19 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.1s, 21 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 1.3s, 59 PlacesBefore, 20 PlacesAfterwards, 57 TransitionsBefore, 15 TransitionsAfterwards, 1032 CoEnabledTransitionPairs, 5 FixpointIterations, 12 TrivialSequentialCompositions, 26 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 9 ConcurrentYvCompositions, 3 ChoiceCompositions, 50 TotalNumberOfCompositions, 1052 MoverChecksTotal - TimeoutResultAtElement [Line: 712]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 712). Cancelled while BasicCegarLoop was constructing difference of abstraction (169states) and FLOYD_HOARE automaton (currently 15 states, 17 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 27 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 53 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 866.2s, OverallIterations: 256, TraceHistogramMax: 6, AutomataDifference: 654.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.3s, HoareTripleCheckerStatistics: 3326 SDtfs, 30306 SDslu, 25311 SDs, 0 SdLazy, 17953 SolverSat, 7548 SolverUnsat, 122 SolverUnknown, 0 SolverNotchecked, 261.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7243 GetRequests, 1237 SyntacticMatches, 228 SemanticMatches, 5777 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37231 ImplicationChecksByTransitivity, 511.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=172occurred in iteration=221, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.9s AutomataMinimizationTime, 255 MinimizatonAttempts, 14901 StatesRemovedByMinimization, 255 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.5s SsaConstructionTime, 3.9s SatisfiabilityAnalysisTime, 144.7s InterpolantComputationTime, 6518 NumberOfCodeBlocks, 6518 NumberOfCodeBlocksAsserted, 800 NumberOfCheckSat, 6014 ConstructedInterpolants, 31 QuantifiedInterpolants, 666386 SizeOfPredicates, 248 NumberOfNonLiveVariables, 22042 ConjunctsInSsa, 2514 ConjunctsInUnsatCore, 504 InterpolantComputations, 8 PerfectInterpolantSequences, 0/2768 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown