/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -i ../../../trunk/examples/svcomp/pthread/fib_bench_longest-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-b981219 [2020-04-18 03:13:20,979 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-04-18 03:13:20,981 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-04-18 03:13:20,994 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-04-18 03:13:20,994 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-04-18 03:13:20,995 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-04-18 03:13:20,997 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-04-18 03:13:20,999 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-04-18 03:13:21,000 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-04-18 03:13:21,001 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-04-18 03:13:21,002 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-04-18 03:13:21,003 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-04-18 03:13:21,004 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-04-18 03:13:21,005 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-04-18 03:13:21,006 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-04-18 03:13:21,007 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-04-18 03:13:21,008 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-04-18 03:13:21,009 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-04-18 03:13:21,011 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-04-18 03:13:21,013 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-04-18 03:13:21,014 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-04-18 03:13:21,016 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-04-18 03:13:21,017 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-04-18 03:13:21,017 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-04-18 03:13:21,020 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-04-18 03:13:21,020 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-04-18 03:13:21,020 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-04-18 03:13:21,021 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-04-18 03:13:21,022 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-04-18 03:13:21,023 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-04-18 03:13:21,023 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-04-18 03:13:21,024 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-04-18 03:13:21,025 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-04-18 03:13:21,026 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-04-18 03:13:21,027 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-04-18 03:13:21,027 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-04-18 03:13:21,029 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-04-18 03:13:21,029 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-04-18 03:13:21,029 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-04-18 03:13:21,030 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-04-18 03:13:21,031 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-04-18 03:13:21,032 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2020-04-18 03:13:21,053 INFO L113 SettingsManager]: Loading preferences was successful [2020-04-18 03:13:21,053 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-04-18 03:13:21,058 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-04-18 03:13:21,058 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-04-18 03:13:21,058 INFO L138 SettingsManager]: * Use SBE=true [2020-04-18 03:13:21,058 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-04-18 03:13:21,059 INFO L138 SettingsManager]: * sizeof long=4 [2020-04-18 03:13:21,059 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-04-18 03:13:21,059 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-04-18 03:13:21,059 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-04-18 03:13:21,059 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-04-18 03:13:21,059 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-04-18 03:13:21,060 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-04-18 03:13:21,060 INFO L138 SettingsManager]: * sizeof long double=12 [2020-04-18 03:13:21,061 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-04-18 03:13:21,061 INFO L138 SettingsManager]: * Use constant arrays=true [2020-04-18 03:13:21,061 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-04-18 03:13:21,061 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-04-18 03:13:21,062 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-04-18 03:13:21,062 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-04-18 03:13:21,062 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-04-18 03:13:21,062 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-04-18 03:13:21,063 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-04-18 03:13:21,063 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-04-18 03:13:21,063 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-04-18 03:13:21,063 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-04-18 03:13:21,064 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-04-18 03:13:21,064 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2020-04-18 03:13:21,065 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-04-18 03:13:21,065 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-04-18 03:13:21,373 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-04-18 03:13:21,387 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-04-18 03:13:21,392 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-04-18 03:13:21,393 INFO L271 PluginConnector]: Initializing CDTParser... [2020-04-18 03:13:21,394 INFO L275 PluginConnector]: CDTParser initialized [2020-04-18 03:13:21,395 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench_longest-1.i [2020-04-18 03:13:21,470 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb340dc1f/452e1d4b85474faf978542f84bfa8ce1/FLAGc92e9af1b [2020-04-18 03:13:22,012 INFO L306 CDTParser]: Found 1 translation units. [2020-04-18 03:13:22,013 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench_longest-1.i [2020-04-18 03:13:22,031 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb340dc1f/452e1d4b85474faf978542f84bfa8ce1/FLAGc92e9af1b [2020-04-18 03:13:22,296 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb340dc1f/452e1d4b85474faf978542f84bfa8ce1 [2020-04-18 03:13:22,307 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-04-18 03:13:22,331 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-04-18 03:13:22,332 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-04-18 03:13:22,332 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-04-18 03:13:22,336 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-04-18 03:13:22,337 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.04 03:13:22" (1/1) ... [2020-04-18 03:13:22,340 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76b7a32d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:13:22, skipping insertion in model container [2020-04-18 03:13:22,340 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.04 03:13:22" (1/1) ... [2020-04-18 03:13:22,348 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-04-18 03:13:22,400 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-04-18 03:13:22,927 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-04-18 03:13:22,937 INFO L203 MainTranslator]: Completed pre-run [2020-04-18 03:13:22,991 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-04-18 03:13:23,093 INFO L208 MainTranslator]: Completed translation [2020-04-18 03:13:23,094 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:13:23 WrapperNode [2020-04-18 03:13:23,094 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-04-18 03:13:23,095 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-04-18 03:13:23,095 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-04-18 03:13:23,095 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-04-18 03:13:23,104 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:13:23" (1/1) ... [2020-04-18 03:13:23,141 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:13:23" (1/1) ... [2020-04-18 03:13:23,169 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-04-18 03:13:23,169 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-04-18 03:13:23,170 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-04-18 03:13:23,170 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-04-18 03:13:23,178 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:13:23" (1/1) ... [2020-04-18 03:13:23,178 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:13:23" (1/1) ... [2020-04-18 03:13:23,180 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:13:23" (1/1) ... [2020-04-18 03:13:23,180 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:13:23" (1/1) ... [2020-04-18 03:13:23,186 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:13:23" (1/1) ... [2020-04-18 03:13:23,193 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:13:23" (1/1) ... [2020-04-18 03:13:23,195 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:13:23" (1/1) ... [2020-04-18 03:13:23,198 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-04-18 03:13:23,199 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-04-18 03:13:23,199 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-04-18 03:13:23,199 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-04-18 03:13:23,200 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:13:23" (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 [2020-04-18 03:13:23,263 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-04-18 03:13:23,264 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-04-18 03:13:23,264 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-04-18 03:13:23,264 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-04-18 03:13:23,264 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-04-18 03:13:23,265 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-04-18 03:13:23,265 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-04-18 03:13:23,265 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-04-18 03:13:23,265 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-04-18 03:13:23,266 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-04-18 03:13:23,266 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-04-18 03:13:23,268 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-04-18 03:13:23,643 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-04-18 03:13:23,643 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-04-18 03:13:23,647 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.04 03:13:23 BoogieIcfgContainer [2020-04-18 03:13:23,647 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-04-18 03:13:23,648 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-04-18 03:13:23,649 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-04-18 03:13:23,652 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-04-18 03:13:23,652 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.04 03:13:22" (1/3) ... [2020-04-18 03:13:23,653 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34652bcf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.04 03:13:23, skipping insertion in model container [2020-04-18 03:13:23,653 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:13:23" (2/3) ... [2020-04-18 03:13:23,654 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34652bcf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.04 03:13:23, skipping insertion in model container [2020-04-18 03:13:23,654 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.04 03:13:23" (3/3) ... [2020-04-18 03:13:23,656 INFO L109 eAbstractionObserver]: Analyzing ICFG fib_bench_longest-1.i [2020-04-18 03:13:23,666 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-04-18 03:13:23,666 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-04-18 03:13:23,673 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-04-18 03:13:23,674 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-04-18 03:13:23,696 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,697 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,697 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,698 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,698 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,698 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,699 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,699 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,699 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,699 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,700 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,700 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,700 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,701 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,701 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,702 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,702 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,702 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,702 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,703 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,703 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,703 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,704 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,704 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,704 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,705 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,705 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,705 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,705 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,706 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,709 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,710 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,710 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,710 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,710 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,711 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,717 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,717 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,718 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,718 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,718 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,718 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,734 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-04-18 03:13:23,757 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-04-18 03:13:23,757 INFO L376 AbstractCegarLoop]: Hoare is true [2020-04-18 03:13:23,758 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-04-18 03:13:23,758 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-04-18 03:13:23,758 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-04-18 03:13:23,758 INFO L380 AbstractCegarLoop]: Difference is false [2020-04-18 03:13:23,758 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-04-18 03:13:23,758 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-04-18 03:13:23,774 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 59 places, 57 transitions, 124 flow [2020-04-18 03:13:23,887 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 1741 states. [2020-04-18 03:13:23,889 INFO L276 IsEmpty]: Start isEmpty. Operand 1741 states. [2020-04-18 03:13:23,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-04-18 03:13:23,905 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:13:23,906 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:13:23,907 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:13:23,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:13:23,913 INFO L82 PathProgramCache]: Analyzing trace with hash -229509324, now seen corresponding path program 1 times [2020-04-18 03:13:23,923 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:13:23,923 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267244317] [2020-04-18 03:13:23,924 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:13:24,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:13:24,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:13:24,361 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267244317] [2020-04-18 03:13:24,362 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 03:13:24,362 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-04-18 03:13:24,363 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100667208] [2020-04-18 03:13:24,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-04-18 03:13:24,369 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:13:24,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-18 03:13:24,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-04-18 03:13:24,388 INFO L87 Difference]: Start difference. First operand 1741 states. Second operand 6 states. [2020-04-18 03:13:24,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:13:24,636 INFO L93 Difference]: Finished difference Result 3726 states and 10822 transitions. [2020-04-18 03:13:24,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-18 03:13:24,638 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-04-18 03:13:24,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:13:24,665 INFO L225 Difference]: With dead ends: 3726 [2020-04-18 03:13:24,665 INFO L226 Difference]: Without dead ends: 1164 [2020-04-18 03:13:24,667 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-04-18 03:13:24,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1164 states. [2020-04-18 03:13:24,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1164 to 899. [2020-04-18 03:13:24,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 899 states. [2020-04-18 03:13:24,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 2439 transitions. [2020-04-18 03:13:24,810 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 2439 transitions. Word has length 22 [2020-04-18 03:13:24,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:13:24,810 INFO L479 AbstractCegarLoop]: Abstraction has 899 states and 2439 transitions. [2020-04-18 03:13:24,810 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-04-18 03:13:24,811 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 2439 transitions. [2020-04-18 03:13:24,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-18 03:13:24,821 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:13:24,821 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:13:24,822 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:13:24,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:13:24,822 INFO L82 PathProgramCache]: Analyzing trace with hash -2049778618, now seen corresponding path program 1 times [2020-04-18 03:13:24,822 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:13:24,823 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535240489] [2020-04-18 03:13:24,823 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:13:24,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:13:25,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:13:25,083 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535240489] [2020-04-18 03:13:25,083 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 03:13:25,083 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-04-18 03:13:25,084 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014531868] [2020-04-18 03:13:25,085 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-04-18 03:13:25,086 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:13:25,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-18 03:13:25,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-04-18 03:13:25,087 INFO L87 Difference]: Start difference. First operand 899 states and 2439 transitions. Second operand 7 states. [2020-04-18 03:13:25,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:13:25,299 INFO L93 Difference]: Finished difference Result 1676 states and 4449 transitions. [2020-04-18 03:13:25,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-18 03:13:25,300 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-04-18 03:13:25,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:13:25,313 INFO L225 Difference]: With dead ends: 1676 [2020-04-18 03:13:25,313 INFO L226 Difference]: Without dead ends: 1418 [2020-04-18 03:13:25,315 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2020-04-18 03:13:25,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1418 states. [2020-04-18 03:13:25,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1418 to 994. [2020-04-18 03:13:25,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 994 states. [2020-04-18 03:13:25,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 994 states to 994 states and 2707 transitions. [2020-04-18 03:13:25,353 INFO L78 Accepts]: Start accepts. Automaton has 994 states and 2707 transitions. Word has length 27 [2020-04-18 03:13:25,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:13:25,354 INFO L479 AbstractCegarLoop]: Abstraction has 994 states and 2707 transitions. [2020-04-18 03:13:25,354 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-04-18 03:13:25,354 INFO L276 IsEmpty]: Start isEmpty. Operand 994 states and 2707 transitions. [2020-04-18 03:13:25,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-18 03:13:25,356 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:13:25,356 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:13:25,356 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:13:25,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:13:25,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1770660956, now seen corresponding path program 1 times [2020-04-18 03:13:25,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:13:25,357 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160630298] [2020-04-18 03:13:25,358 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:13:25,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:13:25,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:13:25,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160630298] [2020-04-18 03:13:25,528 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 03:13:25,528 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-04-18 03:13:25,528 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355961392] [2020-04-18 03:13:25,529 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-04-18 03:13:25,529 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:13:25,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-18 03:13:25,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-04-18 03:13:25,530 INFO L87 Difference]: Start difference. First operand 994 states and 2707 transitions. Second operand 7 states. [2020-04-18 03:13:25,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:13:25,753 INFO L93 Difference]: Finished difference Result 1682 states and 4428 transitions. [2020-04-18 03:13:25,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-18 03:13:25,754 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-04-18 03:13:25,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:13:25,763 INFO L225 Difference]: With dead ends: 1682 [2020-04-18 03:13:25,763 INFO L226 Difference]: Without dead ends: 1378 [2020-04-18 03:13:25,764 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-04-18 03:13:25,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1378 states. [2020-04-18 03:13:25,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1378 to 1097. [2020-04-18 03:13:25,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1097 states. [2020-04-18 03:13:25,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1097 states to 1097 states and 2930 transitions. [2020-04-18 03:13:25,806 INFO L78 Accepts]: Start accepts. Automaton has 1097 states and 2930 transitions. Word has length 27 [2020-04-18 03:13:25,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:13:25,809 INFO L479 AbstractCegarLoop]: Abstraction has 1097 states and 2930 transitions. [2020-04-18 03:13:25,809 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-04-18 03:13:25,809 INFO L276 IsEmpty]: Start isEmpty. Operand 1097 states and 2930 transitions. [2020-04-18 03:13:25,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-18 03:13:25,812 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:13:25,812 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:13:25,812 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:13:25,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:13:25,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1708993586, now seen corresponding path program 2 times [2020-04-18 03:13:25,813 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:13:25,814 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72928197] [2020-04-18 03:13:25,814 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:13:25,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:13:26,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:13:26,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72928197] [2020-04-18 03:13:26,010 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 03:13:26,010 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-04-18 03:13:26,010 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513418495] [2020-04-18 03:13:26,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-04-18 03:13:26,011 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:13:26,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-18 03:13:26,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-04-18 03:13:26,011 INFO L87 Difference]: Start difference. First operand 1097 states and 2930 transitions. Second operand 7 states. [2020-04-18 03:13:26,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:13:26,254 INFO L93 Difference]: Finished difference Result 1914 states and 5020 transitions. [2020-04-18 03:13:26,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-04-18 03:13:26,255 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-04-18 03:13:26,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:13:26,267 INFO L225 Difference]: With dead ends: 1914 [2020-04-18 03:13:26,267 INFO L226 Difference]: Without dead ends: 1592 [2020-04-18 03:13:26,269 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-04-18 03:13:26,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1592 states. [2020-04-18 03:13:26,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1592 to 1175. [2020-04-18 03:13:26,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1175 states. [2020-04-18 03:13:26,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1175 states to 1175 states and 3155 transitions. [2020-04-18 03:13:26,315 INFO L78 Accepts]: Start accepts. Automaton has 1175 states and 3155 transitions. Word has length 27 [2020-04-18 03:13:26,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:13:26,315 INFO L479 AbstractCegarLoop]: Abstraction has 1175 states and 3155 transitions. [2020-04-18 03:13:26,315 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-04-18 03:13:26,315 INFO L276 IsEmpty]: Start isEmpty. Operand 1175 states and 3155 transitions. [2020-04-18 03:13:26,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-04-18 03:13:26,318 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:13:26,318 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:13:26,318 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:13:26,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:13:26,318 INFO L82 PathProgramCache]: Analyzing trace with hash -357259747, now seen corresponding path program 1 times [2020-04-18 03:13:26,319 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:13:26,319 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701648509] [2020-04-18 03:13:26,320 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:13:26,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:13:26,520 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:13:26,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701648509] [2020-04-18 03:13:26,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195746649] [2020-04-18 03:13:26,521 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:13:26,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:13:26,587 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 03:13:26,594 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:13:26,706 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:13:26,719 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:13:26,724 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:13:26,725 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:13:26,725 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2020-04-18 03:13:26,725 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968462948] [2020-04-18 03:13:26,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-18 03:13:26,726 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:13:26,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-18 03:13:26,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-04-18 03:13:26,727 INFO L87 Difference]: Start difference. First operand 1175 states and 3155 transitions. Second operand 11 states. [2020-04-18 03:13:27,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:13:27,049 INFO L93 Difference]: Finished difference Result 2360 states and 6199 transitions. [2020-04-18 03:13:27,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-18 03:13:27,049 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2020-04-18 03:13:27,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:13:27,062 INFO L225 Difference]: With dead ends: 2360 [2020-04-18 03:13:27,062 INFO L226 Difference]: Without dead ends: 1996 [2020-04-18 03:13:27,063 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2020-04-18 03:13:27,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1996 states. [2020-04-18 03:13:27,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1996 to 1365. [2020-04-18 03:13:27,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1365 states. [2020-04-18 03:13:27,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1365 states to 1365 states and 3691 transitions. [2020-04-18 03:13:27,106 INFO L78 Accepts]: Start accepts. Automaton has 1365 states and 3691 transitions. Word has length 32 [2020-04-18 03:13:27,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:13:27,107 INFO L479 AbstractCegarLoop]: Abstraction has 1365 states and 3691 transitions. [2020-04-18 03:13:27,107 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-18 03:13:27,107 INFO L276 IsEmpty]: Start isEmpty. Operand 1365 states and 3691 transitions. [2020-04-18 03:13:27,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-04-18 03:13:27,109 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:13:27,109 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:13:27,314 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:13:27,314 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:13:27,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:13:27,314 INFO L82 PathProgramCache]: Analyzing trace with hash 393433554, now seen corresponding path program 1 times [2020-04-18 03:13:27,315 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:13:27,315 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361708046] [2020-04-18 03:13:27,315 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:13:27,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:13:27,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:13:27,437 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361708046] [2020-04-18 03:13:27,438 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 03:13:27,438 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-04-18 03:13:27,438 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403877591] [2020-04-18 03:13:27,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-04-18 03:13:27,439 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:13:27,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-04-18 03:13:27,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-04-18 03:13:27,439 INFO L87 Difference]: Start difference. First operand 1365 states and 3691 transitions. Second operand 8 states. [2020-04-18 03:13:27,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:13:27,670 INFO L93 Difference]: Finished difference Result 2205 states and 5742 transitions. [2020-04-18 03:13:27,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-18 03:13:27,671 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-04-18 03:13:27,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:13:27,683 INFO L225 Difference]: With dead ends: 2205 [2020-04-18 03:13:27,683 INFO L226 Difference]: Without dead ends: 1901 [2020-04-18 03:13:27,684 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-04-18 03:13:27,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1901 states. [2020-04-18 03:13:27,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1901 to 1482. [2020-04-18 03:13:27,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1482 states. [2020-04-18 03:13:27,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1482 states to 1482 states and 3958 transitions. [2020-04-18 03:13:27,731 INFO L78 Accepts]: Start accepts. Automaton has 1482 states and 3958 transitions. Word has length 32 [2020-04-18 03:13:27,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:13:27,732 INFO L479 AbstractCegarLoop]: Abstraction has 1482 states and 3958 transitions. [2020-04-18 03:13:27,732 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-04-18 03:13:27,732 INFO L276 IsEmpty]: Start isEmpty. Operand 1482 states and 3958 transitions. [2020-04-18 03:13:27,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-04-18 03:13:27,735 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:13:27,735 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:13:27,735 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:13:27,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:13:27,735 INFO L82 PathProgramCache]: Analyzing trace with hash 455100924, now seen corresponding path program 2 times [2020-04-18 03:13:27,736 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:13:27,736 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413297467] [2020-04-18 03:13:27,736 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:13:27,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:13:27,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:13:27,903 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413297467] [2020-04-18 03:13:27,903 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 03:13:27,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-04-18 03:13:27,904 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682018144] [2020-04-18 03:13:27,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-04-18 03:13:27,904 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:13:27,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-04-18 03:13:27,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-04-18 03:13:27,905 INFO L87 Difference]: Start difference. First operand 1482 states and 3958 transitions. Second operand 8 states. [2020-04-18 03:13:28,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:13:28,202 INFO L93 Difference]: Finished difference Result 2692 states and 7053 transitions. [2020-04-18 03:13:28,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-18 03:13:28,203 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-04-18 03:13:28,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:13:28,216 INFO L225 Difference]: With dead ends: 2692 [2020-04-18 03:13:28,216 INFO L226 Difference]: Without dead ends: 2264 [2020-04-18 03:13:28,217 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=311, Unknown=0, NotChecked=0, Total=420 [2020-04-18 03:13:28,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2264 states. [2020-04-18 03:13:28,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2264 to 1572. [2020-04-18 03:13:28,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1572 states. [2020-04-18 03:13:28,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1572 states to 1572 states and 4240 transitions. [2020-04-18 03:13:28,265 INFO L78 Accepts]: Start accepts. Automaton has 1572 states and 4240 transitions. Word has length 32 [2020-04-18 03:13:28,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:13:28,266 INFO L479 AbstractCegarLoop]: Abstraction has 1572 states and 4240 transitions. [2020-04-18 03:13:28,266 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-04-18 03:13:28,266 INFO L276 IsEmpty]: Start isEmpty. Operand 1572 states and 4240 transitions. [2020-04-18 03:13:28,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-04-18 03:13:28,269 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:13:28,269 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:13:28,269 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:13:28,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:13:28,270 INFO L82 PathProgramCache]: Analyzing trace with hash 69801563, now seen corresponding path program 1 times [2020-04-18 03:13:28,270 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:13:28,270 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791677075] [2020-04-18 03:13:28,270 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:13:28,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:13:28,409 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:13:28,410 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791677075] [2020-04-18 03:13:28,410 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378465267] [2020-04-18 03:13:28,410 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:13:28,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:13:28,463 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 03:13:28,471 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:13:28,577 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:13:28,584 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:13:28,584 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:13:28,585 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2020-04-18 03:13:28,585 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562315238] [2020-04-18 03:13:28,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-18 03:13:28,586 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:13:28,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-18 03:13:28,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2020-04-18 03:13:28,586 INFO L87 Difference]: Start difference. First operand 1572 states and 4240 transitions. Second operand 14 states. [2020-04-18 03:13:29,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:13:29,007 INFO L93 Difference]: Finished difference Result 2674 states and 6904 transitions. [2020-04-18 03:13:29,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-18 03:13:29,008 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 37 [2020-04-18 03:13:29,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:13:29,022 INFO L225 Difference]: With dead ends: 2674 [2020-04-18 03:13:29,022 INFO L226 Difference]: Without dead ends: 2282 [2020-04-18 03:13:29,023 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=142, Invalid=560, Unknown=0, NotChecked=0, Total=702 [2020-04-18 03:13:29,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2282 states. [2020-04-18 03:13:29,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2282 to 1696. [2020-04-18 03:13:29,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1696 states. [2020-04-18 03:13:29,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1696 states to 1696 states and 4534 transitions. [2020-04-18 03:13:29,075 INFO L78 Accepts]: Start accepts. Automaton has 1696 states and 4534 transitions. Word has length 37 [2020-04-18 03:13:29,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:13:29,075 INFO L479 AbstractCegarLoop]: Abstraction has 1696 states and 4534 transitions. [2020-04-18 03:13:29,076 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-18 03:13:29,076 INFO L276 IsEmpty]: Start isEmpty. Operand 1696 states and 4534 transitions. [2020-04-18 03:13:29,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-04-18 03:13:29,081 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:13:29,082 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:13:29,291 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:13:29,291 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:13:29,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:13:29,292 INFO L82 PathProgramCache]: Analyzing trace with hash 131468933, now seen corresponding path program 2 times [2020-04-18 03:13:29,292 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:13:29,293 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270422389] [2020-04-18 03:13:29,293 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:13:29,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:13:29,658 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:13:29,658 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270422389] [2020-04-18 03:13:29,659 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887807474] [2020-04-18 03:13:29,659 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:13:29,718 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 03:13:29,719 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:13:29,720 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 03:13:29,724 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:13:29,843 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:13:29,899 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:13:29,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:13:29,911 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:13:29,912 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2020-04-18 03:13:29,912 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628542983] [2020-04-18 03:13:29,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-18 03:13:29,913 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:13:29,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-18 03:13:29,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-04-18 03:13:29,913 INFO L87 Difference]: Start difference. First operand 1696 states and 4534 transitions. Second operand 14 states. [2020-04-18 03:13:30,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:13:30,820 INFO L93 Difference]: Finished difference Result 3848 states and 9987 transitions. [2020-04-18 03:13:30,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-04-18 03:13:30,820 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 37 [2020-04-18 03:13:30,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:13:30,846 INFO L225 Difference]: With dead ends: 3848 [2020-04-18 03:13:30,846 INFO L226 Difference]: Without dead ends: 3050 [2020-04-18 03:13:30,849 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=276, Invalid=1130, Unknown=0, NotChecked=0, Total=1406 [2020-04-18 03:13:30,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3050 states. [2020-04-18 03:13:30,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3050 to 1870. [2020-04-18 03:13:30,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1870 states. [2020-04-18 03:13:30,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1870 states to 1870 states and 5014 transitions. [2020-04-18 03:13:30,914 INFO L78 Accepts]: Start accepts. Automaton has 1870 states and 5014 transitions. Word has length 37 [2020-04-18 03:13:30,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:13:30,915 INFO L479 AbstractCegarLoop]: Abstraction has 1870 states and 5014 transitions. [2020-04-18 03:13:30,915 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-18 03:13:30,915 INFO L276 IsEmpty]: Start isEmpty. Operand 1870 states and 5014 transitions. [2020-04-18 03:13:30,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-04-18 03:13:30,918 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:13:30,918 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:13:31,130 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:13:31,131 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:13:31,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:13:31,131 INFO L82 PathProgramCache]: Analyzing trace with hash -246375699, now seen corresponding path program 1 times [2020-04-18 03:13:31,132 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:13:31,132 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132425028] [2020-04-18 03:13:31,132 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:13:31,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:13:31,263 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:13:31,264 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132425028] [2020-04-18 03:13:31,264 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759225238] [2020-04-18 03:13:31,264 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:13:31,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:13:31,337 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 03:13:31,339 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:13:31,487 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:13:31,494 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:13:31,495 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:13:31,495 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2020-04-18 03:13:31,496 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216256769] [2020-04-18 03:13:31,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-18 03:13:31,497 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:13:31,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-18 03:13:31,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-04-18 03:13:31,498 INFO L87 Difference]: Start difference. First operand 1870 states and 5014 transitions. Second operand 14 states. [2020-04-18 03:13:31,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:13:31,770 INFO L93 Difference]: Finished difference Result 2900 states and 7396 transitions. [2020-04-18 03:13:31,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-18 03:13:31,770 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 37 [2020-04-18 03:13:31,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:13:31,793 INFO L225 Difference]: With dead ends: 2900 [2020-04-18 03:13:31,793 INFO L226 Difference]: Without dead ends: 2748 [2020-04-18 03:13:31,797 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2020-04-18 03:13:31,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2748 states. [2020-04-18 03:13:31,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2748 to 1895. [2020-04-18 03:13:31,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1895 states. [2020-04-18 03:13:31,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1895 states to 1895 states and 5069 transitions. [2020-04-18 03:13:31,851 INFO L78 Accepts]: Start accepts. Automaton has 1895 states and 5069 transitions. Word has length 37 [2020-04-18 03:13:31,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:13:31,851 INFO L479 AbstractCegarLoop]: Abstraction has 1895 states and 5069 transitions. [2020-04-18 03:13:31,851 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-18 03:13:31,851 INFO L276 IsEmpty]: Start isEmpty. Operand 1895 states and 5069 transitions. [2020-04-18 03:13:31,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-04-18 03:13:31,855 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:13:31,855 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:13:32,063 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:13:32,064 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:13:32,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:13:32,064 INFO L82 PathProgramCache]: Analyzing trace with hash 992562071, now seen corresponding path program 2 times [2020-04-18 03:13:32,064 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:13:32,065 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650891559] [2020-04-18 03:13:32,065 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:13:32,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:13:32,211 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:13:32,211 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650891559] [2020-04-18 03:13:32,212 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202999512] [2020-04-18 03:13:32,212 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:13:32,306 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 03:13:32,307 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:13:32,307 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 03:13:32,309 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:13:32,415 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:13:32,419 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:13:32,420 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:13:32,420 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2020-04-18 03:13:32,420 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537908277] [2020-04-18 03:13:32,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-18 03:13:32,421 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:13:32,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-18 03:13:32,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-04-18 03:13:32,422 INFO L87 Difference]: Start difference. First operand 1895 states and 5069 transitions. Second operand 14 states. [2020-04-18 03:13:32,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:13:32,684 INFO L93 Difference]: Finished difference Result 3089 states and 7796 transitions. [2020-04-18 03:13:32,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-18 03:13:32,685 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 37 [2020-04-18 03:13:32,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:13:32,694 INFO L225 Difference]: With dead ends: 3089 [2020-04-18 03:13:32,695 INFO L226 Difference]: Without dead ends: 2937 [2020-04-18 03:13:32,695 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2020-04-18 03:13:32,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2937 states. [2020-04-18 03:13:32,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2937 to 1870. [2020-04-18 03:13:32,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1870 states. [2020-04-18 03:13:32,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1870 states to 1870 states and 5014 transitions. [2020-04-18 03:13:32,753 INFO L78 Accepts]: Start accepts. Automaton has 1870 states and 5014 transitions. Word has length 37 [2020-04-18 03:13:32,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:13:32,754 INFO L479 AbstractCegarLoop]: Abstraction has 1870 states and 5014 transitions. [2020-04-18 03:13:32,754 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-18 03:13:32,754 INFO L276 IsEmpty]: Start isEmpty. Operand 1870 states and 5014 transitions. [2020-04-18 03:13:32,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-04-18 03:13:32,757 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:13:32,758 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:13:32,961 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:13:32,962 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:13:32,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:13:32,963 INFO L82 PathProgramCache]: Analyzing trace with hash -1302902873, now seen corresponding path program 3 times [2020-04-18 03:13:32,963 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:13:32,963 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804592765] [2020-04-18 03:13:32,964 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:13:32,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:13:33,072 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:13:33,073 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804592765] [2020-04-18 03:13:33,073 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125239098] [2020-04-18 03:13:33,073 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:13:33,114 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-18 03:13:33,114 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:13:33,115 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 03:13:33,117 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:13:33,208 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:13:33,212 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:13:33,212 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:13:33,212 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2020-04-18 03:13:33,213 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746291838] [2020-04-18 03:13:33,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-18 03:13:33,213 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:13:33,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-18 03:13:33,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-04-18 03:13:33,214 INFO L87 Difference]: Start difference. First operand 1870 states and 5014 transitions. Second operand 14 states. [2020-04-18 03:13:33,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:13:33,629 INFO L93 Difference]: Finished difference Result 3164 states and 8131 transitions. [2020-04-18 03:13:33,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-18 03:13:33,630 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 37 [2020-04-18 03:13:33,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:13:33,637 INFO L225 Difference]: With dead ends: 3164 [2020-04-18 03:13:33,637 INFO L226 Difference]: Without dead ends: 3012 [2020-04-18 03:13:33,638 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=502, Unknown=0, NotChecked=0, Total=650 [2020-04-18 03:13:33,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3012 states. [2020-04-18 03:13:33,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3012 to 1950. [2020-04-18 03:13:33,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1950 states. [2020-04-18 03:13:33,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1950 states to 1950 states and 5264 transitions. [2020-04-18 03:13:33,695 INFO L78 Accepts]: Start accepts. Automaton has 1950 states and 5264 transitions. Word has length 37 [2020-04-18 03:13:33,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:13:33,695 INFO L479 AbstractCegarLoop]: Abstraction has 1950 states and 5264 transitions. [2020-04-18 03:13:33,696 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-18 03:13:33,696 INFO L276 IsEmpty]: Start isEmpty. Operand 1950 states and 5264 transitions. [2020-04-18 03:13:33,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-04-18 03:13:33,699 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:13:33,700 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:13:33,904 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:13:33,905 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:13:33,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:13:33,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1111627043, now seen corresponding path program 4 times [2020-04-18 03:13:33,906 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:13:33,906 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646179848] [2020-04-18 03:13:33,906 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:13:33,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:13:34,020 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:13:34,021 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646179848] [2020-04-18 03:13:34,021 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473198664] [2020-04-18 03:13:34,021 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:13:34,076 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 03:13:34,076 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:13:34,077 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 03:13:34,079 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:13:34,155 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:13:34,173 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:13:34,178 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:13:34,179 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:13:34,179 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2020-04-18 03:13:34,179 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239290904] [2020-04-18 03:13:34,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-18 03:13:34,180 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:13:34,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-18 03:13:34,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2020-04-18 03:13:34,180 INFO L87 Difference]: Start difference. First operand 1950 states and 5264 transitions. Second operand 14 states. [2020-04-18 03:13:35,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:13:35,005 INFO L93 Difference]: Finished difference Result 4568 states and 11807 transitions. [2020-04-18 03:13:35,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-04-18 03:13:35,008 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 37 [2020-04-18 03:13:35,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:13:35,018 INFO L225 Difference]: With dead ends: 4568 [2020-04-18 03:13:35,018 INFO L226 Difference]: Without dead ends: 3770 [2020-04-18 03:13:35,019 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=372, Invalid=1520, Unknown=0, NotChecked=0, Total=1892 [2020-04-18 03:13:35,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3770 states. [2020-04-18 03:13:35,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3770 to 2065. [2020-04-18 03:13:35,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2065 states. [2020-04-18 03:13:35,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2065 states to 2065 states and 5545 transitions. [2020-04-18 03:13:35,100 INFO L78 Accepts]: Start accepts. Automaton has 2065 states and 5545 transitions. Word has length 37 [2020-04-18 03:13:35,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:13:35,101 INFO L479 AbstractCegarLoop]: Abstraction has 2065 states and 5545 transitions. [2020-04-18 03:13:35,101 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-18 03:13:35,101 INFO L276 IsEmpty]: Start isEmpty. Operand 2065 states and 5545 transitions. [2020-04-18 03:13:35,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-04-18 03:13:35,142 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:13:35,143 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:13:35,343 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:13:35,343 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:13:35,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:13:35,344 INFO L82 PathProgramCache]: Analyzing trace with hash -210299971, now seen corresponding path program 2 times [2020-04-18 03:13:35,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:13:35,344 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417524954] [2020-04-18 03:13:35,344 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:13:35,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:13:35,527 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:13:35,528 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417524954] [2020-04-18 03:13:35,528 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180378996] [2020-04-18 03:13:35,528 INFO L92 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 [2020-04-18 03:13:35,577 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 03:13:35,578 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:13:35,578 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 03:13:35,580 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:13:35,684 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:13:35,703 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:13:35,709 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:13:35,710 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:13:35,710 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2020-04-18 03:13:35,710 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174250597] [2020-04-18 03:13:35,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-18 03:13:35,711 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:13:35,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 03:13:35,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-04-18 03:13:35,712 INFO L87 Difference]: Start difference. First operand 2065 states and 5545 transitions. Second operand 15 states. [2020-04-18 03:13:36,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:13:36,073 INFO L93 Difference]: Finished difference Result 3548 states and 9325 transitions. [2020-04-18 03:13:36,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-18 03:13:36,073 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 42 [2020-04-18 03:13:36,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:13:36,081 INFO L225 Difference]: With dead ends: 3548 [2020-04-18 03:13:36,081 INFO L226 Difference]: Without dead ends: 3184 [2020-04-18 03:13:36,082 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=182, Invalid=574, Unknown=0, NotChecked=0, Total=756 [2020-04-18 03:13:36,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3184 states. [2020-04-18 03:13:36,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3184 to 2275. [2020-04-18 03:13:36,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2275 states. [2020-04-18 03:13:36,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2275 states to 2275 states and 6155 transitions. [2020-04-18 03:13:36,144 INFO L78 Accepts]: Start accepts. Automaton has 2275 states and 6155 transitions. Word has length 42 [2020-04-18 03:13:36,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:13:36,144 INFO L479 AbstractCegarLoop]: Abstraction has 2275 states and 6155 transitions. [2020-04-18 03:13:36,144 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-18 03:13:36,144 INFO L276 IsEmpty]: Start isEmpty. Operand 2275 states and 6155 transitions. [2020-04-18 03:13:36,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-04-18 03:13:36,149 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:13:36,149 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:13:36,361 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:13:36,362 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:13:36,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:13:36,362 INFO L82 PathProgramCache]: Analyzing trace with hash 540393330, now seen corresponding path program 3 times [2020-04-18 03:13:36,362 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:13:36,362 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252768705] [2020-04-18 03:13:36,363 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:13:36,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:13:36,500 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:13:36,500 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252768705] [2020-04-18 03:13:36,501 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149527841] [2020-04-18 03:13:36,501 INFO L92 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 [2020-04-18 03:13:36,558 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-18 03:13:36,559 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:13:36,560 INFO L264 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 03:13:36,563 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:13:36,728 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:13:36,737 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:13:36,742 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:13:36,742 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2020-04-18 03:13:36,742 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799282300] [2020-04-18 03:13:36,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-18 03:13:36,743 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:13:36,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-18 03:13:36,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2020-04-18 03:13:36,745 INFO L87 Difference]: Start difference. First operand 2275 states and 6155 transitions. Second operand 16 states. [2020-04-18 03:13:37,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:13:37,276 INFO L93 Difference]: Finished difference Result 3593 states and 9252 transitions. [2020-04-18 03:13:37,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-04-18 03:13:37,277 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 42 [2020-04-18 03:13:37,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:13:37,285 INFO L225 Difference]: With dead ends: 3593 [2020-04-18 03:13:37,285 INFO L226 Difference]: Without dead ends: 3441 [2020-04-18 03:13:37,286 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=211, Invalid=781, Unknown=0, NotChecked=0, Total=992 [2020-04-18 03:13:37,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3441 states. [2020-04-18 03:13:37,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3441 to 2348. [2020-04-18 03:13:37,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2348 states. [2020-04-18 03:13:37,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2348 states to 2348 states and 6320 transitions. [2020-04-18 03:13:37,350 INFO L78 Accepts]: Start accepts. Automaton has 2348 states and 6320 transitions. Word has length 42 [2020-04-18 03:13:37,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:13:37,350 INFO L479 AbstractCegarLoop]: Abstraction has 2348 states and 6320 transitions. [2020-04-18 03:13:37,350 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-18 03:13:37,350 INFO L276 IsEmpty]: Start isEmpty. Operand 2348 states and 6320 transitions. [2020-04-18 03:13:37,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-04-18 03:13:37,355 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:13:37,355 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:13:37,559 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:13:37,562 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:13:37,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:13:37,562 INFO L82 PathProgramCache]: Analyzing trace with hash 602060700, now seen corresponding path program 4 times [2020-04-18 03:13:37,562 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:13:37,562 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883952524] [2020-04-18 03:13:37,562 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:13:37,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:13:37,711 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:13:37,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883952524] [2020-04-18 03:13:37,712 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127596784] [2020-04-18 03:13:37,712 INFO L92 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 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 [2020-04-18 03:13:37,757 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 03:13:37,758 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:13:37,758 INFO L264 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 03:13:37,759 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:13:37,855 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:13:37,908 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:13:37,919 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:13:37,919 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:13:37,919 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2020-04-18 03:13:37,920 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13842437] [2020-04-18 03:13:37,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-18 03:13:37,922 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:13:37,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-18 03:13:37,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2020-04-18 03:13:37,922 INFO L87 Difference]: Start difference. First operand 2348 states and 6320 transitions. Second operand 16 states. [2020-04-18 03:13:38,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:13:38,979 INFO L93 Difference]: Finished difference Result 4790 states and 12362 transitions. [2020-04-18 03:13:38,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-04-18 03:13:38,980 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 42 [2020-04-18 03:13:38,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:13:38,990 INFO L225 Difference]: With dead ends: 4790 [2020-04-18 03:13:38,990 INFO L226 Difference]: Without dead ends: 4250 [2020-04-18 03:13:38,991 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=360, Invalid=1532, Unknown=0, NotChecked=0, Total=1892 [2020-04-18 03:13:39,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4250 states. [2020-04-18 03:13:39,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4250 to 2300. [2020-04-18 03:13:39,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2300 states. [2020-04-18 03:13:39,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2300 states to 2300 states and 6210 transitions. [2020-04-18 03:13:39,113 INFO L78 Accepts]: Start accepts. Automaton has 2300 states and 6210 transitions. Word has length 42 [2020-04-18 03:13:39,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:13:39,113 INFO L479 AbstractCegarLoop]: Abstraction has 2300 states and 6210 transitions. [2020-04-18 03:13:39,113 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-18 03:13:39,113 INFO L276 IsEmpty]: Start isEmpty. Operand 2300 states and 6210 transitions. [2020-04-18 03:13:39,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-04-18 03:13:39,119 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:13:39,119 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:13:39,323 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:13:39,323 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:13:39,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:13:39,325 INFO L82 PathProgramCache]: Analyzing trace with hash 224216068, now seen corresponding path program 1 times [2020-04-18 03:13:39,325 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:13:39,325 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431280775] [2020-04-18 03:13:39,326 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:13:39,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:13:39,457 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:13:39,458 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431280775] [2020-04-18 03:13:39,458 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688418222] [2020-04-18 03:13:39,458 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:13:39,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:13:39,503 INFO L264 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 03:13:39,505 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:13:39,644 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:13:39,655 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:13:39,655 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:13:39,655 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2020-04-18 03:13:39,655 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267956653] [2020-04-18 03:13:39,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-18 03:13:39,656 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:13:39,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-18 03:13:39,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2020-04-18 03:13:39,657 INFO L87 Difference]: Start difference. First operand 2300 states and 6210 transitions. Second operand 16 states. [2020-04-18 03:13:40,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:13:40,065 INFO L93 Difference]: Finished difference Result 3605 states and 9158 transitions. [2020-04-18 03:13:40,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-04-18 03:13:40,065 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 42 [2020-04-18 03:13:40,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:13:40,069 INFO L225 Difference]: With dead ends: 3605 [2020-04-18 03:13:40,070 INFO L226 Difference]: Without dead ends: 3453 [2020-04-18 03:13:40,070 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=169, Invalid=643, Unknown=0, NotChecked=0, Total=812 [2020-04-18 03:13:40,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3453 states. [2020-04-18 03:13:40,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3453 to 2423. [2020-04-18 03:13:40,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2423 states. [2020-04-18 03:13:40,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2423 states to 2423 states and 6485 transitions. [2020-04-18 03:13:40,120 INFO L78 Accepts]: Start accepts. Automaton has 2423 states and 6485 transitions. Word has length 42 [2020-04-18 03:13:40,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:13:40,121 INFO L479 AbstractCegarLoop]: Abstraction has 2423 states and 6485 transitions. [2020-04-18 03:13:40,121 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-18 03:13:40,121 INFO L276 IsEmpty]: Start isEmpty. Operand 2423 states and 6485 transitions. [2020-04-18 03:13:40,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-04-18 03:13:40,125 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:13:40,126 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:13:40,329 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:13:40,329 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:13:40,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:13:40,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1463153838, now seen corresponding path program 2 times [2020-04-18 03:13:40,329 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:13:40,330 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806821661] [2020-04-18 03:13:40,330 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:13:40,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:13:40,482 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:13:40,482 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806821661] [2020-04-18 03:13:40,482 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326472952] [2020-04-18 03:13:40,482 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:13:40,535 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 03:13:40,536 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:13:40,536 INFO L264 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 03:13:40,538 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:13:40,654 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:13:40,659 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:13:40,660 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:13:40,660 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2020-04-18 03:13:40,660 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210304714] [2020-04-18 03:13:40,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-18 03:13:40,660 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:13:40,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-18 03:13:40,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2020-04-18 03:13:40,661 INFO L87 Difference]: Start difference. First operand 2423 states and 6485 transitions. Second operand 16 states. [2020-04-18 03:13:41,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:13:41,153 INFO L93 Difference]: Finished difference Result 4009 states and 10095 transitions. [2020-04-18 03:13:41,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-18 03:13:41,153 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 42 [2020-04-18 03:13:41,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:13:41,158 INFO L225 Difference]: With dead ends: 4009 [2020-04-18 03:13:41,158 INFO L226 Difference]: Without dead ends: 3857 [2020-04-18 03:13:41,158 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=183, Invalid=687, Unknown=0, NotChecked=0, Total=870 [2020-04-18 03:13:41,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3857 states. [2020-04-18 03:13:41,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3857 to 2402. [2020-04-18 03:13:41,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2402 states. [2020-04-18 03:13:41,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2402 states to 2402 states and 6495 transitions. [2020-04-18 03:13:41,218 INFO L78 Accepts]: Start accepts. Automaton has 2402 states and 6495 transitions. Word has length 42 [2020-04-18 03:13:41,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:13:41,218 INFO L479 AbstractCegarLoop]: Abstraction has 2402 states and 6495 transitions. [2020-04-18 03:13:41,219 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-18 03:13:41,219 INFO L276 IsEmpty]: Start isEmpty. Operand 2402 states and 6495 transitions. [2020-04-18 03:13:41,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-04-18 03:13:41,226 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:13:41,226 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:13:41,429 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:13:41,429 INFO L427 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:13:41,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:13:41,430 INFO L82 PathProgramCache]: Analyzing trace with hash -832311106, now seen corresponding path program 3 times [2020-04-18 03:13:41,430 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:13:41,431 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864883327] [2020-04-18 03:13:41,431 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:13:41,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:13:41,585 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:13:41,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864883327] [2020-04-18 03:13:41,586 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587245847] [2020-04-18 03:13:41,586 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:13:41,623 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-18 03:13:41,624 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:13:41,624 INFO L264 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 03:13:41,626 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:13:41,731 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:13:41,734 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:13:41,735 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:13:41,735 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2020-04-18 03:13:41,735 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337761633] [2020-04-18 03:13:41,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-18 03:13:41,735 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:13:41,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-18 03:13:41,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-04-18 03:13:41,736 INFO L87 Difference]: Start difference. First operand 2402 states and 6495 transitions. Second operand 16 states. [2020-04-18 03:13:42,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:13:42,293 INFO L93 Difference]: Finished difference Result 4055 states and 10460 transitions. [2020-04-18 03:13:42,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-04-18 03:13:42,294 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 42 [2020-04-18 03:13:42,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:13:42,298 INFO L225 Difference]: With dead ends: 4055 [2020-04-18 03:13:42,298 INFO L226 Difference]: Without dead ends: 3903 [2020-04-18 03:13:42,299 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=235, Invalid=887, Unknown=0, NotChecked=0, Total=1122 [2020-04-18 03:13:42,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3903 states. [2020-04-18 03:13:42,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3903 to 2524. [2020-04-18 03:13:42,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2524 states. [2020-04-18 03:13:42,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2524 states to 2524 states and 6857 transitions. [2020-04-18 03:13:42,358 INFO L78 Accepts]: Start accepts. Automaton has 2524 states and 6857 transitions. Word has length 42 [2020-04-18 03:13:42,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:13:42,358 INFO L479 AbstractCegarLoop]: Abstraction has 2524 states and 6857 transitions. [2020-04-18 03:13:42,358 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-18 03:13:42,358 INFO L276 IsEmpty]: Start isEmpty. Operand 2524 states and 6857 transitions. [2020-04-18 03:13:42,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-04-18 03:13:42,362 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:13:42,362 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:13:42,566 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:13:42,566 INFO L427 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:13:42,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:13:42,567 INFO L82 PathProgramCache]: Analyzing trace with hash -641035276, now seen corresponding path program 4 times [2020-04-18 03:13:42,567 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:13:42,567 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956578496] [2020-04-18 03:13:42,568 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:13:42,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:13:42,761 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:13:42,762 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956578496] [2020-04-18 03:13:42,762 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490225095] [2020-04-18 03:13:42,762 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:13:42,820 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 03:13:42,821 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:13:42,821 INFO L264 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 03:13:42,822 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:13:42,912 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:13:42,941 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:13:42,948 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:13:42,949 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:13:42,949 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2020-04-18 03:13:42,949 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055947152] [2020-04-18 03:13:42,949 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-18 03:13:42,950 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:13:42,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-18 03:13:42,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-04-18 03:13:42,950 INFO L87 Difference]: Start difference. First operand 2524 states and 6857 transitions. Second operand 16 states. [2020-04-18 03:13:43,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:13:43,956 INFO L93 Difference]: Finished difference Result 5590 states and 14497 transitions. [2020-04-18 03:13:43,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-04-18 03:13:43,957 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 42 [2020-04-18 03:13:43,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:13:43,965 INFO L225 Difference]: With dead ends: 5590 [2020-04-18 03:13:43,966 INFO L226 Difference]: Without dead ends: 4792 [2020-04-18 03:13:43,967 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 705 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=478, Invalid=2072, Unknown=0, NotChecked=0, Total=2550 [2020-04-18 03:13:43,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4792 states. [2020-04-18 03:13:44,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4792 to 2626. [2020-04-18 03:13:44,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2626 states. [2020-04-18 03:13:44,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2626 states to 2626 states and 7117 transitions. [2020-04-18 03:13:44,037 INFO L78 Accepts]: Start accepts. Automaton has 2626 states and 7117 transitions. Word has length 42 [2020-04-18 03:13:44,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:13:44,038 INFO L479 AbstractCegarLoop]: Abstraction has 2626 states and 7117 transitions. [2020-04-18 03:13:44,038 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-18 03:13:44,038 INFO L276 IsEmpty]: Start isEmpty. Operand 2626 states and 7117 transitions. [2020-04-18 03:13:44,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-04-18 03:13:44,043 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:13:44,043 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:13:44,249 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:13:44,250 INFO L427 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:13:44,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:13:44,250 INFO L82 PathProgramCache]: Analyzing trace with hash 904539323, now seen corresponding path program 5 times [2020-04-18 03:13:44,250 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:13:44,251 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492024495] [2020-04-18 03:13:44,251 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:13:44,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:13:44,391 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:13:44,391 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492024495] [2020-04-18 03:13:44,392 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637121796] [2020-04-18 03:13:44,392 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:13:44,438 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-04-18 03:13:44,439 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:13:44,439 INFO L264 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-18 03:13:44,441 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:13:44,612 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:13:44,624 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:13:44,624 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:13:44,625 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-04-18 03:13:44,625 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695895331] [2020-04-18 03:13:44,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-18 03:13:44,625 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:13:44,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-18 03:13:44,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-04-18 03:13:44,626 INFO L87 Difference]: Start difference. First operand 2626 states and 7117 transitions. Second operand 18 states. [2020-04-18 03:13:45,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:13:45,191 INFO L93 Difference]: Finished difference Result 3922 states and 10102 transitions. [2020-04-18 03:13:45,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-04-18 03:13:45,191 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 47 [2020-04-18 03:13:45,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:13:45,196 INFO L225 Difference]: With dead ends: 3922 [2020-04-18 03:13:45,196 INFO L226 Difference]: Without dead ends: 3770 [2020-04-18 03:13:45,196 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=259, Invalid=1001, Unknown=0, NotChecked=0, Total=1260 [2020-04-18 03:13:45,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3770 states. [2020-04-18 03:13:45,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3770 to 2699. [2020-04-18 03:13:45,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2699 states. [2020-04-18 03:13:45,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2699 states to 2699 states and 7282 transitions. [2020-04-18 03:13:45,241 INFO L78 Accepts]: Start accepts. Automaton has 2699 states and 7282 transitions. Word has length 47 [2020-04-18 03:13:45,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:13:45,241 INFO L479 AbstractCegarLoop]: Abstraction has 2699 states and 7282 transitions. [2020-04-18 03:13:45,241 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-18 03:13:45,242 INFO L276 IsEmpty]: Start isEmpty. Operand 2699 states and 7282 transitions. [2020-04-18 03:13:45,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-04-18 03:13:45,246 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:13:45,246 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:13:45,451 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:13:45,451 INFO L427 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:13:45,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:13:45,452 INFO L82 PathProgramCache]: Analyzing trace with hash 966206693, now seen corresponding path program 6 times [2020-04-18 03:13:45,452 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:13:45,452 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544575316] [2020-04-18 03:13:45,452 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:13:45,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:13:45,615 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:13:45,616 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544575316] [2020-04-18 03:13:45,616 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068013327] [2020-04-18 03:13:45,616 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:13:45,671 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-04-18 03:13:45,672 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:13:45,673 INFO L264 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-18 03:13:45,674 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:13:45,828 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:13:45,888 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:13:45,900 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:13:45,900 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:13:45,901 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-04-18 03:13:45,901 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613895770] [2020-04-18 03:13:45,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-18 03:13:45,902 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:13:45,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-18 03:13:45,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-04-18 03:13:45,903 INFO L87 Difference]: Start difference. First operand 2699 states and 7282 transitions. Second operand 18 states. [2020-04-18 03:13:46,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:13:46,885 INFO L93 Difference]: Finished difference Result 5308 states and 13691 transitions. [2020-04-18 03:13:46,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-04-18 03:13:46,886 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 47 [2020-04-18 03:13:46,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:13:46,891 INFO L225 Difference]: With dead ends: 5308 [2020-04-18 03:13:46,891 INFO L226 Difference]: Without dead ends: 4768 [2020-04-18 03:13:46,892 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=416, Invalid=1840, Unknown=0, NotChecked=0, Total=2256 [2020-04-18 03:13:46,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4768 states. [2020-04-18 03:13:46,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4768 to 2611. [2020-04-18 03:13:46,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2611 states. [2020-04-18 03:13:46,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2611 states to 2611 states and 7024 transitions. [2020-04-18 03:13:46,937 INFO L78 Accepts]: Start accepts. Automaton has 2611 states and 7024 transitions. Word has length 47 [2020-04-18 03:13:46,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:13:46,937 INFO L479 AbstractCegarLoop]: Abstraction has 2611 states and 7024 transitions. [2020-04-18 03:13:46,937 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-18 03:13:46,937 INFO L276 IsEmpty]: Start isEmpty. Operand 2611 states and 7024 transitions. [2020-04-18 03:13:46,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-04-18 03:13:46,941 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:13:46,941 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:13:47,142 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:13:47,143 INFO L427 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:13:47,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:13:47,144 INFO L82 PathProgramCache]: Analyzing trace with hash 588362061, now seen corresponding path program 5 times [2020-04-18 03:13:47,144 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:13:47,144 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128415617] [2020-04-18 03:13:47,144 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:13:47,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:13:47,289 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:13:47,290 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128415617] [2020-04-18 03:13:47,290 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839769001] [2020-04-18 03:13:47,290 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:13:47,342 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-18 03:13:47,342 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:13:47,343 INFO L264 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-18 03:13:47,343 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:13:47,552 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:13:47,560 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:13:47,560 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:13:47,560 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-04-18 03:13:47,560 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016466724] [2020-04-18 03:13:47,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-18 03:13:47,561 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:13:47,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-18 03:13:47,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2020-04-18 03:13:47,561 INFO L87 Difference]: Start difference. First operand 2611 states and 7024 transitions. Second operand 18 states. [2020-04-18 03:13:48,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:13:48,153 INFO L93 Difference]: Finished difference Result 4238 states and 10616 transitions. [2020-04-18 03:13:48,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-18 03:13:48,153 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 47 [2020-04-18 03:13:48,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:13:48,158 INFO L225 Difference]: With dead ends: 4238 [2020-04-18 03:13:48,158 INFO L226 Difference]: Without dead ends: 4086 [2020-04-18 03:13:48,158 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=224, Invalid=898, Unknown=0, NotChecked=0, Total=1122 [2020-04-18 03:13:48,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4086 states. [2020-04-18 03:13:48,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4086 to 2725. [2020-04-18 03:13:48,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2725 states. [2020-04-18 03:13:48,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2725 states to 2725 states and 7284 transitions. [2020-04-18 03:13:48,203 INFO L78 Accepts]: Start accepts. Automaton has 2725 states and 7284 transitions. Word has length 47 [2020-04-18 03:13:48,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:13:48,204 INFO L479 AbstractCegarLoop]: Abstraction has 2725 states and 7284 transitions. [2020-04-18 03:13:48,204 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-18 03:13:48,204 INFO L276 IsEmpty]: Start isEmpty. Operand 2725 states and 7284 transitions. [2020-04-18 03:13:48,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-04-18 03:13:48,208 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:13:48,208 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:13:48,412 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:13:48,412 INFO L427 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:13:48,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:13:48,412 INFO L82 PathProgramCache]: Analyzing trace with hash 1827299831, now seen corresponding path program 6 times [2020-04-18 03:13:48,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:13:48,413 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067874665] [2020-04-18 03:13:48,413 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:13:48,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:13:48,589 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:13:48,589 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067874665] [2020-04-18 03:13:48,590 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983808613] [2020-04-18 03:13:48,590 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:13:48,655 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-18 03:13:48,656 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:13:48,657 INFO L264 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-18 03:13:48,658 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:13:58,922 WARN L192 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 20 [2020-04-18 03:13:58,924 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:13:58,940 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:13:58,940 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:13:58,940 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-04-18 03:13:58,941 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795741658] [2020-04-18 03:13:58,941 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-18 03:13:58,941 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:13:58,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-18 03:13:58,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=247, Unknown=4, NotChecked=0, Total=306 [2020-04-18 03:13:58,942 INFO L87 Difference]: Start difference. First operand 2725 states and 7284 transitions. Second operand 18 states. [2020-04-18 03:14:05,465 WARN L192 SmtUtils]: Spent 4.05 s on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2020-04-18 03:14:25,754 WARN L192 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 24 [2020-04-18 03:14:33,861 WARN L192 SmtUtils]: Spent 4.03 s on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2020-04-18 03:15:16,285 WARN L192 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 25 [2020-04-18 03:15:24,426 WARN L192 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 22 [2020-04-18 03:15:26,463 WARN L192 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 22 [2020-04-18 03:17:09,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:17:09,123 INFO L93 Difference]: Finished difference Result 4736 states and 11873 transitions. [2020-04-18 03:17:09,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-04-18 03:17:09,130 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 47 [2020-04-18 03:17:09,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:17:09,135 INFO L225 Difference]: With dead ends: 4736 [2020-04-18 03:17:09,135 INFO L226 Difference]: Without dead ends: 4496 [2020-04-18 03:17:09,136 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 35.0s TimeCoverageRelationStatistics Valid=269, Invalid=1129, Unknown=8, NotChecked=0, Total=1406 [2020-04-18 03:17:09,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4496 states. [2020-04-18 03:17:09,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4496 to 2688. [2020-04-18 03:17:09,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2688 states. [2020-04-18 03:17:09,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2688 states to 2688 states and 7257 transitions. [2020-04-18 03:17:09,233 INFO L78 Accepts]: Start accepts. Automaton has 2688 states and 7257 transitions. Word has length 47 [2020-04-18 03:17:09,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:17:09,234 INFO L479 AbstractCegarLoop]: Abstraction has 2688 states and 7257 transitions. [2020-04-18 03:17:09,234 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-18 03:17:09,234 INFO L276 IsEmpty]: Start isEmpty. Operand 2688 states and 7257 transitions. [2020-04-18 03:17:09,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-04-18 03:17:09,239 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:17:09,239 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:17:09,439 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:17:09,440 INFO L427 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:17:09,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:17:09,441 INFO L82 PathProgramCache]: Analyzing trace with hash -468165113, now seen corresponding path program 7 times [2020-04-18 03:17:09,441 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:17:09,441 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642311026] [2020-04-18 03:17:09,441 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:17:09,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:17:09,606 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:17:09,606 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642311026] [2020-04-18 03:17:09,606 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500083163] [2020-04-18 03:17:09,606 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2020-04-18 03:17:09,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:17:09,654 INFO L264 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-18 03:17:09,655 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:17:09,886 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:17:09,894 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:17:09,895 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:17:09,895 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-04-18 03:17:09,895 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101205015] [2020-04-18 03:17:09,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-18 03:17:09,895 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:17:09,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-18 03:17:09,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-04-18 03:17:09,896 INFO L87 Difference]: Start difference. First operand 2688 states and 7257 transitions. Second operand 18 states. [2020-04-18 03:17:11,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:17:11,176 INFO L93 Difference]: Finished difference Result 4675 states and 12050 transitions. [2020-04-18 03:17:11,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-04-18 03:17:11,177 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 47 [2020-04-18 03:17:11,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:17:11,183 INFO L225 Difference]: With dead ends: 4675 [2020-04-18 03:17:11,184 INFO L226 Difference]: Without dead ends: 4523 [2020-04-18 03:17:11,185 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=330, Invalid=1310, Unknown=0, NotChecked=0, Total=1640 [2020-04-18 03:17:11,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4523 states. [2020-04-18 03:17:11,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4523 to 2810. [2020-04-18 03:17:11,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2810 states. [2020-04-18 03:17:11,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2810 states to 2810 states and 7619 transitions. [2020-04-18 03:17:11,248 INFO L78 Accepts]: Start accepts. Automaton has 2810 states and 7619 transitions. Word has length 47 [2020-04-18 03:17:11,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:17:11,249 INFO L479 AbstractCegarLoop]: Abstraction has 2810 states and 7619 transitions. [2020-04-18 03:17:11,249 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-18 03:17:11,249 INFO L276 IsEmpty]: Start isEmpty. Operand 2810 states and 7619 transitions. [2020-04-18 03:17:11,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-04-18 03:17:11,254 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:17:11,254 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:17:11,465 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:17:11,465 INFO L427 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:17:11,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:17:11,466 INFO L82 PathProgramCache]: Analyzing trace with hash -276889283, now seen corresponding path program 8 times [2020-04-18 03:17:11,466 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:17:11,467 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399373839] [2020-04-18 03:17:11,467 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:17:11,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:17:11,669 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:17:11,669 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399373839] [2020-04-18 03:17:11,669 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133863463] [2020-04-18 03:17:11,669 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:17:11,729 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 03:17:11,730 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:17:11,730 INFO L264 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-18 03:17:11,731 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:17:11,898 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:17:11,954 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:17:11,960 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:17:11,961 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:17:11,961 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-04-18 03:17:11,961 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137135864] [2020-04-18 03:17:11,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-18 03:17:11,962 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:17:11,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-18 03:17:11,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2020-04-18 03:17:11,962 INFO L87 Difference]: Start difference. First operand 2810 states and 7619 transitions. Second operand 18 states. [2020-04-18 03:17:13,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:17:13,695 INFO L93 Difference]: Finished difference Result 5835 states and 15214 transitions. [2020-04-18 03:17:13,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-04-18 03:17:13,695 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 47 [2020-04-18 03:17:13,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:17:13,702 INFO L225 Difference]: With dead ends: 5835 [2020-04-18 03:17:13,702 INFO L226 Difference]: Without dead ends: 5295 [2020-04-18 03:17:13,703 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 722 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=502, Invalid=2150, Unknown=0, NotChecked=0, Total=2652 [2020-04-18 03:17:13,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5295 states. [2020-04-18 03:17:13,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5295 to 2611. [2020-04-18 03:17:13,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2611 states. [2020-04-18 03:17:13,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2611 states to 2611 states and 7024 transitions. [2020-04-18 03:17:13,765 INFO L78 Accepts]: Start accepts. Automaton has 2611 states and 7024 transitions. Word has length 47 [2020-04-18 03:17:13,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:17:13,765 INFO L479 AbstractCegarLoop]: Abstraction has 2611 states and 7024 transitions. [2020-04-18 03:17:13,766 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-18 03:17:13,766 INFO L276 IsEmpty]: Start isEmpty. Operand 2611 states and 7024 transitions. [2020-04-18 03:17:13,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-04-18 03:17:13,770 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:17:13,770 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:17:13,974 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:17:13,974 INFO L427 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:17:13,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:17:13,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1355517405, now seen corresponding path program 9 times [2020-04-18 03:17:13,974 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:17:13,974 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148724840] [2020-04-18 03:17:13,975 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:17:13,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:17:14,160 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:17:14,160 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148724840] [2020-04-18 03:17:14,160 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333742525] [2020-04-18 03:17:14,160 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2020-04-18 03:17:14,209 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-18 03:17:14,209 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:17:14,210 INFO L264 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-18 03:17:14,211 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:17:14,392 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:17:14,398 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:17:14,398 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:17:14,398 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-04-18 03:17:14,398 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433168329] [2020-04-18 03:17:14,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-18 03:17:14,399 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:17:14,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-18 03:17:14,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-04-18 03:17:14,399 INFO L87 Difference]: Start difference. First operand 2611 states and 7024 transitions. Second operand 18 states. [2020-04-18 03:17:15,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:17:15,131 INFO L93 Difference]: Finished difference Result 4334 states and 10808 transitions. [2020-04-18 03:17:15,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-04-18 03:17:15,132 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 47 [2020-04-18 03:17:15,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:17:15,136 INFO L225 Difference]: With dead ends: 4334 [2020-04-18 03:17:15,137 INFO L226 Difference]: Without dead ends: 4182 [2020-04-18 03:17:15,137 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=271, Invalid=1061, Unknown=0, NotChecked=0, Total=1332 [2020-04-18 03:17:15,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4182 states. [2020-04-18 03:17:15,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4182 to 2736. [2020-04-18 03:17:15,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2736 states. [2020-04-18 03:17:15,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2736 states to 2736 states and 7299 transitions. [2020-04-18 03:17:15,178 INFO L78 Accepts]: Start accepts. Automaton has 2736 states and 7299 transitions. Word has length 47 [2020-04-18 03:17:15,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:17:15,178 INFO L479 AbstractCegarLoop]: Abstraction has 2736 states and 7299 transitions. [2020-04-18 03:17:15,178 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-18 03:17:15,178 INFO L276 IsEmpty]: Start isEmpty. Operand 2736 states and 7299 transitions. [2020-04-18 03:17:15,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-04-18 03:17:15,183 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:17:15,183 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:17:15,386 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:17:15,386 INFO L427 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:17:15,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:17:15,387 INFO L82 PathProgramCache]: Analyzing trace with hash -1170160443, now seen corresponding path program 10 times [2020-04-18 03:17:15,387 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:17:15,388 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958357183] [2020-04-18 03:17:15,388 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:17:15,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:17:15,579 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:17:15,579 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958357183] [2020-04-18 03:17:15,579 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785546590] [2020-04-18 03:17:15,580 INFO L92 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 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 [2020-04-18 03:17:15,624 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 03:17:15,624 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:17:15,624 INFO L264 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-18 03:17:15,625 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:17:16,196 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:17:16,208 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:17:16,209 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:17:16,209 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-04-18 03:17:16,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187362110] [2020-04-18 03:17:16,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-18 03:17:16,209 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:17:16,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-18 03:17:16,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=245, Unknown=1, NotChecked=0, Total=306 [2020-04-18 03:17:16,210 INFO L87 Difference]: Start difference. First operand 2736 states and 7299 transitions. Second operand 18 states. [2020-04-18 03:17:17,601 WARN L192 SmtUtils]: Spent 815.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2020-04-18 03:17:18,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:17:18,367 INFO L93 Difference]: Finished difference Result 4704 states and 11686 transitions. [2020-04-18 03:17:18,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-04-18 03:17:18,368 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 47 [2020-04-18 03:17:18,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:17:18,374 INFO L225 Difference]: With dead ends: 4704 [2020-04-18 03:17:18,374 INFO L226 Difference]: Without dead ends: 4312 [2020-04-18 03:17:18,375 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=272, Invalid=1209, Unknown=1, NotChecked=0, Total=1482 [2020-04-18 03:17:18,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4312 states. [2020-04-18 03:17:18,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4312 to 2849. [2020-04-18 03:17:18,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2849 states. [2020-04-18 03:17:18,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2849 states to 2849 states and 7544 transitions. [2020-04-18 03:17:18,431 INFO L78 Accepts]: Start accepts. Automaton has 2849 states and 7544 transitions. Word has length 47 [2020-04-18 03:17:18,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:17:18,432 INFO L479 AbstractCegarLoop]: Abstraction has 2849 states and 7544 transitions. [2020-04-18 03:17:18,432 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-18 03:17:18,432 INFO L276 IsEmpty]: Start isEmpty. Operand 2849 states and 7544 transitions. [2020-04-18 03:17:18,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-04-18 03:17:18,436 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:17:18,437 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:17:18,637 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:17:18,638 INFO L427 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:17:18,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:17:18,638 INFO L82 PathProgramCache]: Analyzing trace with hash -453462157, now seen corresponding path program 11 times [2020-04-18 03:17:18,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:17:18,639 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970175395] [2020-04-18 03:17:18,639 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:17:18,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:17:18,793 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:17:18,794 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970175395] [2020-04-18 03:17:18,794 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767583598] [2020-04-18 03:17:18,794 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2020-04-18 03:17:18,842 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-18 03:17:18,842 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:17:18,843 INFO L264 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-18 03:17:18,844 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:17:18,999 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:17:19,006 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:17:19,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:17:19,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-04-18 03:17:19,006 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054934125] [2020-04-18 03:17:19,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-18 03:17:19,007 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:17:19,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-18 03:17:19,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-04-18 03:17:19,007 INFO L87 Difference]: Start difference. First operand 2849 states and 7544 transitions. Second operand 18 states. [2020-04-18 03:17:19,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:17:19,700 INFO L93 Difference]: Finished difference Result 5114 states and 12513 transitions. [2020-04-18 03:17:19,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-04-18 03:17:19,700 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 47 [2020-04-18 03:17:19,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:17:19,708 INFO L225 Difference]: With dead ends: 5114 [2020-04-18 03:17:19,708 INFO L226 Difference]: Without dead ends: 4962 [2020-04-18 03:17:19,709 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=286, Invalid=1120, Unknown=0, NotChecked=0, Total=1406 [2020-04-18 03:17:19,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4962 states. [2020-04-18 03:17:19,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4962 to 2899. [2020-04-18 03:17:19,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2899 states. [2020-04-18 03:17:19,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2899 states to 2899 states and 7714 transitions. [2020-04-18 03:17:19,804 INFO L78 Accepts]: Start accepts. Automaton has 2899 states and 7714 transitions. Word has length 47 [2020-04-18 03:17:19,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:17:19,804 INFO L479 AbstractCegarLoop]: Abstraction has 2899 states and 7714 transitions. [2020-04-18 03:17:19,804 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-18 03:17:19,804 INFO L276 IsEmpty]: Start isEmpty. Operand 2899 states and 7714 transitions. [2020-04-18 03:17:19,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-04-18 03:17:19,808 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:17:19,808 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:17:20,008 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:17:20,009 INFO L427 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:17:20,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:17:20,010 INFO L82 PathProgramCache]: Analyzing trace with hash 1315827291, now seen corresponding path program 12 times [2020-04-18 03:17:20,010 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:17:20,010 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360939157] [2020-04-18 03:17:20,011 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:17:20,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:17:20,165 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:17:20,165 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360939157] [2020-04-18 03:17:20,165 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528430654] [2020-04-18 03:17:20,165 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2020-04-18 03:17:20,211 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-18 03:17:20,212 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:17:20,212 INFO L264 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-18 03:17:20,214 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:17:20,836 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:17:20,842 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:17:20,842 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:17:20,842 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-04-18 03:17:20,843 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945320882] [2020-04-18 03:17:20,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-18 03:17:20,843 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:17:20,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-18 03:17:20,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=249, Unknown=1, NotChecked=0, Total=306 [2020-04-18 03:17:20,844 INFO L87 Difference]: Start difference. First operand 2899 states and 7714 transitions. Second operand 18 states. [2020-04-18 03:17:21,938 WARN L192 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2020-04-18 03:17:22,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:17:22,795 INFO L93 Difference]: Finished difference Result 5294 states and 12976 transitions. [2020-04-18 03:17:22,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-04-18 03:17:22,795 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 47 [2020-04-18 03:17:22,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:17:22,802 INFO L225 Difference]: With dead ends: 5294 [2020-04-18 03:17:22,802 INFO L226 Difference]: Without dead ends: 4902 [2020-04-18 03:17:22,803 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=323, Invalid=1482, Unknown=1, NotChecked=0, Total=1806 [2020-04-18 03:17:22,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4902 states. [2020-04-18 03:17:22,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4902 to 2854. [2020-04-18 03:17:22,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2854 states. [2020-04-18 03:17:22,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2854 states to 2854 states and 7629 transitions. [2020-04-18 03:17:22,862 INFO L78 Accepts]: Start accepts. Automaton has 2854 states and 7629 transitions. Word has length 47 [2020-04-18 03:17:22,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:17:22,863 INFO L479 AbstractCegarLoop]: Abstraction has 2854 states and 7629 transitions. [2020-04-18 03:17:22,863 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-18 03:17:22,863 INFO L276 IsEmpty]: Start isEmpty. Operand 2854 states and 7629 transitions. [2020-04-18 03:17:22,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-04-18 03:17:22,867 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:17:22,868 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:17:23,071 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:17:23,071 INFO L427 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:17:23,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:17:23,071 INFO L82 PathProgramCache]: Analyzing trace with hash -45706517, now seen corresponding path program 13 times [2020-04-18 03:17:23,072 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:17:23,072 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379063474] [2020-04-18 03:17:23,072 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:17:23,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:17:23,240 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:17:23,241 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379063474] [2020-04-18 03:17:23,241 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367844926] [2020-04-18 03:17:23,241 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2020-04-18 03:17:23,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:17:23,287 INFO L264 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-18 03:17:23,288 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:17:23,443 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:17:23,452 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:17:23,452 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:17:23,452 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-04-18 03:17:23,453 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941839175] [2020-04-18 03:17:23,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-18 03:17:23,453 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:17:23,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-18 03:17:23,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-04-18 03:17:23,453 INFO L87 Difference]: Start difference. First operand 2854 states and 7629 transitions. Second operand 18 states. [2020-04-18 03:17:24,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:17:24,368 INFO L93 Difference]: Finished difference Result 5075 states and 12747 transitions. [2020-04-18 03:17:24,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-04-18 03:17:24,369 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 47 [2020-04-18 03:17:24,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:17:24,374 INFO L225 Difference]: With dead ends: 5075 [2020-04-18 03:17:24,374 INFO L226 Difference]: Without dead ends: 4923 [2020-04-18 03:17:24,375 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=346, Invalid=1376, Unknown=0, NotChecked=0, Total=1722 [2020-04-18 03:17:24,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4923 states. [2020-04-18 03:17:24,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4923 to 2954. [2020-04-18 03:17:24,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2954 states. [2020-04-18 03:17:24,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2954 states to 2954 states and 7969 transitions. [2020-04-18 03:17:24,420 INFO L78 Accepts]: Start accepts. Automaton has 2954 states and 7969 transitions. Word has length 47 [2020-04-18 03:17:24,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:17:24,420 INFO L479 AbstractCegarLoop]: Abstraction has 2954 states and 7969 transitions. [2020-04-18 03:17:24,420 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-18 03:17:24,420 INFO L276 IsEmpty]: Start isEmpty. Operand 2954 states and 7969 transitions. [2020-04-18 03:17:24,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-04-18 03:17:24,424 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:17:24,424 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:17:24,626 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:17:24,626 INFO L427 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:17:24,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:17:24,627 INFO L82 PathProgramCache]: Analyzing trace with hash -528903065, now seen corresponding path program 14 times [2020-04-18 03:17:24,627 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:17:24,627 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364673958] [2020-04-18 03:17:24,628 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:17:24,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:17:24,772 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:17:24,773 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364673958] [2020-04-18 03:17:24,773 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371644986] [2020-04-18 03:17:24,773 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2020-04-18 03:17:24,818 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 03:17:24,818 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:17:24,819 INFO L264 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-18 03:17:24,821 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:17:24,974 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:17:24,981 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:17:24,981 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:17:24,981 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-04-18 03:17:24,981 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824416201] [2020-04-18 03:17:24,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-18 03:17:24,982 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:17:24,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-18 03:17:24,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2020-04-18 03:17:24,982 INFO L87 Difference]: Start difference. First operand 2954 states and 7969 transitions. Second operand 18 states. [2020-04-18 03:17:26,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:17:26,037 INFO L93 Difference]: Finished difference Result 5263 states and 13465 transitions. [2020-04-18 03:17:26,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-04-18 03:17:26,037 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 47 [2020-04-18 03:17:26,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:17:26,043 INFO L225 Difference]: With dead ends: 5263 [2020-04-18 03:17:26,043 INFO L226 Difference]: Without dead ends: 5111 [2020-04-18 03:17:26,044 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=449, Invalid=1807, Unknown=0, NotChecked=0, Total=2256 [2020-04-18 03:17:26,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5111 states. [2020-04-18 03:17:26,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5111 to 3034. [2020-04-18 03:17:26,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3034 states. [2020-04-18 03:17:26,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3034 states to 3034 states and 8219 transitions. [2020-04-18 03:17:26,089 INFO L78 Accepts]: Start accepts. Automaton has 3034 states and 8219 transitions. Word has length 47 [2020-04-18 03:17:26,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:17:26,089 INFO L479 AbstractCegarLoop]: Abstraction has 3034 states and 8219 transitions. [2020-04-18 03:17:26,089 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-18 03:17:26,090 INFO L276 IsEmpty]: Start isEmpty. Operand 3034 states and 8219 transitions. [2020-04-18 03:17:26,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-04-18 03:17:26,093 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:17:26,093 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:17:26,294 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:17:26,295 INFO L427 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:17:26,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:17:26,295 INFO L82 PathProgramCache]: Analyzing trace with hash -337627235, now seen corresponding path program 15 times [2020-04-18 03:17:26,296 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:17:26,296 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749068362] [2020-04-18 03:17:26,296 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:17:26,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:17:26,460 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:17:26,461 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749068362] [2020-04-18 03:17:26,461 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281972192] [2020-04-18 03:17:26,461 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2020-04-18 03:17:26,514 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-18 03:17:26,514 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:17:26,515 INFO L264 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-18 03:17:26,516 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:17:26,616 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:17:26,662 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:17:26,669 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:17:26,669 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:17:26,669 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-04-18 03:17:26,670 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612906878] [2020-04-18 03:17:26,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-18 03:17:26,670 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:17:26,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-18 03:17:26,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-04-18 03:17:26,690 INFO L87 Difference]: Start difference. First operand 3034 states and 8219 transitions. Second operand 18 states. [2020-04-18 03:17:28,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:17:28,653 INFO L93 Difference]: Finished difference Result 7111 states and 18403 transitions. [2020-04-18 03:17:28,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-04-18 03:17:28,657 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 47 [2020-04-18 03:17:28,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:17:28,666 INFO L225 Difference]: With dead ends: 7111 [2020-04-18 03:17:28,666 INFO L226 Difference]: Without dead ends: 6313 [2020-04-18 03:17:28,668 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1139 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=663, Invalid=3119, Unknown=0, NotChecked=0, Total=3782 [2020-04-18 03:17:28,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6313 states. [2020-04-18 03:17:28,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6313 to 2977. [2020-04-18 03:17:28,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2977 states. [2020-04-18 03:17:28,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2977 states to 2977 states and 8033 transitions. [2020-04-18 03:17:28,715 INFO L78 Accepts]: Start accepts. Automaton has 2977 states and 8033 transitions. Word has length 47 [2020-04-18 03:17:28,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:17:28,716 INFO L479 AbstractCegarLoop]: Abstraction has 2977 states and 8033 transitions. [2020-04-18 03:17:28,716 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-18 03:17:28,716 INFO L276 IsEmpty]: Start isEmpty. Operand 2977 states and 8033 transitions. [2020-04-18 03:17:28,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-04-18 03:17:28,719 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:17:28,719 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:17:28,920 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:17:28,920 INFO L427 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:17:28,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:17:28,921 INFO L82 PathProgramCache]: Analyzing trace with hash 779959919, now seen corresponding path program 16 times [2020-04-18 03:17:28,921 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:17:28,921 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695854325] [2020-04-18 03:17:28,922 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:17:28,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:17:29,124 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:17:29,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695854325] [2020-04-18 03:17:29,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159297332] [2020-04-18 03:17:29,125 INFO L92 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 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 [2020-04-18 03:17:29,193 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 03:17:29,193 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:17:29,194 INFO L264 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-18 03:17:29,196 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:17:29,808 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:17:29,820 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:17:29,820 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:17:29,820 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-04-18 03:17:29,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829243758] [2020-04-18 03:17:29,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-18 03:17:29,821 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:17:29,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-18 03:17:29,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=250, Unknown=1, NotChecked=0, Total=306 [2020-04-18 03:17:29,821 INFO L87 Difference]: Start difference. First operand 2977 states and 8033 transitions. Second operand 18 states. [2020-04-18 03:17:31,191 WARN L192 SmtUtils]: Spent 415.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-04-18 03:17:31,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:17:31,713 INFO L93 Difference]: Finished difference Result 5013 states and 12609 transitions. [2020-04-18 03:17:31,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-04-18 03:17:31,713 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 47 [2020-04-18 03:17:31,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:17:31,718 INFO L225 Difference]: With dead ends: 5013 [2020-04-18 03:17:31,719 INFO L226 Difference]: Without dead ends: 4861 [2020-04-18 03:17:31,719 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=363, Invalid=1442, Unknown=1, NotChecked=0, Total=1806 [2020-04-18 03:17:31,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4861 states. [2020-04-18 03:17:31,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4861 to 2985. [2020-04-18 03:17:31,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2985 states. [2020-04-18 03:17:31,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2985 states to 2985 states and 8091 transitions. [2020-04-18 03:17:31,759 INFO L78 Accepts]: Start accepts. Automaton has 2985 states and 8091 transitions. Word has length 47 [2020-04-18 03:17:31,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:17:31,759 INFO L479 AbstractCegarLoop]: Abstraction has 2985 states and 8091 transitions. [2020-04-18 03:17:31,760 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-18 03:17:31,760 INFO L276 IsEmpty]: Start isEmpty. Operand 2985 states and 8091 transitions. [2020-04-18 03:17:31,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-04-18 03:17:31,763 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:17:31,763 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:17:31,963 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:17:31,964 INFO L427 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:17:31,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:17:31,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1515505025, now seen corresponding path program 17 times [2020-04-18 03:17:31,965 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:17:31,965 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847559265] [2020-04-18 03:17:31,966 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:17:31,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:17:32,125 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:17:32,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847559265] [2020-04-18 03:17:32,126 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479371644] [2020-04-18 03:17:32,126 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2020-04-18 03:17:32,172 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-18 03:17:32,172 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:17:32,173 INFO L264 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-18 03:17:32,174 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:17:32,338 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:17:32,344 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:17:32,344 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:17:32,345 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-04-18 03:17:32,345 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890410425] [2020-04-18 03:17:32,345 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-18 03:17:32,345 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:17:32,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-18 03:17:32,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2020-04-18 03:17:32,346 INFO L87 Difference]: Start difference. First operand 2985 states and 8091 transitions. Second operand 18 states. [2020-04-18 03:17:33,377 WARN L192 SmtUtils]: Spent 431.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2020-04-18 03:17:34,097 WARN L192 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2020-04-18 03:17:34,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:17:34,346 INFO L93 Difference]: Finished difference Result 5459 states and 14060 transitions. [2020-04-18 03:17:34,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-04-18 03:17:34,346 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 47 [2020-04-18 03:17:34,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:17:34,352 INFO L225 Difference]: With dead ends: 5459 [2020-04-18 03:17:34,352 INFO L226 Difference]: Without dead ends: 5307 [2020-04-18 03:17:34,353 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=436, Invalid=1726, Unknown=0, NotChecked=0, Total=2162 [2020-04-18 03:17:34,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5307 states. [2020-04-18 03:17:34,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5307 to 3137. [2020-04-18 03:17:34,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3137 states. [2020-04-18 03:17:34,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3137 states to 3137 states and 8533 transitions. [2020-04-18 03:17:34,397 INFO L78 Accepts]: Start accepts. Automaton has 3137 states and 8533 transitions. Word has length 47 [2020-04-18 03:17:34,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:17:34,397 INFO L479 AbstractCegarLoop]: Abstraction has 3137 states and 8533 transitions. [2020-04-18 03:17:34,397 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-18 03:17:34,397 INFO L276 IsEmpty]: Start isEmpty. Operand 3137 states and 8533 transitions. [2020-04-18 03:17:34,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-04-18 03:17:34,400 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:17:34,400 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:17:34,602 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:17:34,603 INFO L427 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:17:34,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:17:34,603 INFO L82 PathProgramCache]: Analyzing trace with hash -1324229195, now seen corresponding path program 18 times [2020-04-18 03:17:34,604 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:17:34,604 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509942555] [2020-04-18 03:17:34,604 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:17:34,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:17:34,783 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:17:34,783 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509942555] [2020-04-18 03:17:34,783 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847982477] [2020-04-18 03:17:34,783 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2020-04-18 03:17:34,829 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-18 03:17:34,829 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:17:34,829 INFO L264 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-18 03:17:34,830 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:17:35,801 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:17:36,308 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:17:36,314 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:17:36,315 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:17:36,315 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-04-18 03:17:36,315 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761721113] [2020-04-18 03:17:36,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-18 03:17:36,315 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:17:36,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-18 03:17:36,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=246, Unknown=1, NotChecked=0, Total=306 [2020-04-18 03:17:36,316 INFO L87 Difference]: Start difference. First operand 3137 states and 8533 transitions. Second operand 18 states. [2020-04-18 03:17:55,995 WARN L192 SmtUtils]: Spent 458.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 Received shutdown request... [2020-04-18 03:17:58,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-04-18 03:17:58,860 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:17:58,861 WARN L544 AbstractCegarLoop]: Verification canceled [2020-04-18 03:17:58,867 WARN L228 ceAbstractionStarter]: Timeout [2020-04-18 03:17:58,868 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.04 03:17:58 BasicIcfg [2020-04-18 03:17:58,868 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-04-18 03:17:58,869 INFO L168 Benchmark]: Toolchain (without parser) took 276560.57 ms. Allocated memory was 143.1 MB in the beginning and 558.4 MB in the end (delta: 415.2 MB). Free memory was 99.5 MB in the beginning and 279.3 MB in the end (delta: -179.8 MB). Peak memory consumption was 235.4 MB. Max. memory is 7.1 GB. [2020-04-18 03:17:58,869 INFO L168 Benchmark]: CDTParser took 1.36 ms. Allocated memory is still 143.1 MB. Free memory was 119.3 MB in the beginning and 119.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-04-18 03:17:58,870 INFO L168 Benchmark]: CACSL2BoogieTranslator took 762.40 ms. Allocated memory was 143.1 MB in the beginning and 202.9 MB in the end (delta: 59.8 MB). Free memory was 97.5 MB in the beginning and 162.4 MB in the end (delta: -64.9 MB). Peak memory consumption was 20.1 MB. Max. memory is 7.1 GB. [2020-04-18 03:17:58,870 INFO L168 Benchmark]: Boogie Procedure Inliner took 73.98 ms. Allocated memory is still 202.9 MB. Free memory was 161.7 MB in the beginning and 159.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-04-18 03:17:58,870 INFO L168 Benchmark]: Boogie Preprocessor took 28.73 ms. Allocated memory is still 202.9 MB. Free memory was 159.7 MB in the beginning and 158.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-04-18 03:17:58,871 INFO L168 Benchmark]: RCFGBuilder took 448.74 ms. Allocated memory is still 202.9 MB. Free memory was 158.4 MB in the beginning and 138.3 MB in the end (delta: 20.1 MB). Peak memory consumption was 20.1 MB. Max. memory is 7.1 GB. [2020-04-18 03:17:58,871 INFO L168 Benchmark]: TraceAbstraction took 275219.34 ms. Allocated memory was 202.9 MB in the beginning and 558.4 MB in the end (delta: 355.5 MB). Free memory was 137.6 MB in the beginning and 279.3 MB in the end (delta: -141.7 MB). Peak memory consumption was 213.8 MB. Max. memory is 7.1 GB. [2020-04-18 03:17:58,873 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.36 ms. Allocated memory is still 143.1 MB. Free memory was 119.3 MB in the beginning and 119.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 762.40 ms. Allocated memory was 143.1 MB in the beginning and 202.9 MB in the end (delta: 59.8 MB). Free memory was 97.5 MB in the beginning and 162.4 MB in the end (delta: -64.9 MB). Peak memory consumption was 20.1 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 73.98 ms. Allocated memory is still 202.9 MB. Free memory was 161.7 MB in the beginning and 159.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 28.73 ms. Allocated memory is still 202.9 MB. Free memory was 159.7 MB in the beginning and 158.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 448.74 ms. Allocated memory is still 202.9 MB. Free memory was 158.4 MB in the beginning and 138.3 MB in the end (delta: 20.1 MB). Peak memory consumption was 20.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 275219.34 ms. Allocated memory was 202.9 MB in the beginning and 558.4 MB in the end (delta: 355.5 MB). Free memory was 137.6 MB in the beginning and 279.3 MB in the end (delta: -141.7 MB). Peak memory consumption was 213.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 712]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 712). Cancelled while BasicCegarLoop was constructing difference of abstraction (3137states) and FLOYD_HOARE automaton (currently 50 states, 18 states before enhancement),while ReachableStatesComputation was computing reachable states (5059 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 53 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 275.1s, OverallIterations: 36, TraceHistogramMax: 4, AutomataDifference: 240.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 3863 SDtfs, 22993 SDslu, 36184 SDs, 0 SdLazy, 6789 SolverSat, 1739 SolverUnsat, 109 SolverUnknown, 0 SolverNotchecked, 187.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2320 GetRequests, 1154 SyntacticMatches, 3 SemanticMatches, 1163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11337 ImplicationChecksByTransitivity, 70.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3137occurred in iteration=35, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 2.0s AutomataMinimizationTime, 35 MinimizatonAttempts, 48806 StatesRemovedByMinimization, 35 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 23.2s InterpolantComputationTime, 2767 NumberOfCodeBlocks, 2767 NumberOfCodeBlocksAsserted, 103 NumberOfCheckSat, 2701 ConstructedInterpolants, 33 QuantifiedInterpolants, 1179713 SizeOfPredicates, 120 NumberOfNonLiveVariables, 3118 ConjunctsInSsa, 338 ConjunctsInUnsatCore, 66 InterpolantComputations, 6 PerfectInterpolantSequences, 0/530 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