/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_longer-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-b981219 [2020-04-18 03:13:20,901 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-04-18 03:13:20,904 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-04-18 03:13:20,918 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-04-18 03:13:20,919 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-04-18 03:13:20,920 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-04-18 03:13:20,921 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-04-18 03:13:20,923 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-04-18 03:13:20,925 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-04-18 03:13:20,926 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-04-18 03:13:20,927 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-04-18 03:13:20,930 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-04-18 03:13:20,931 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-04-18 03:13:20,931 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-04-18 03:13:20,935 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-04-18 03:13:20,936 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-04-18 03:13:20,937 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-04-18 03:13:20,938 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-04-18 03:13:20,942 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-04-18 03:13:20,946 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-04-18 03:13:20,949 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-04-18 03:13:20,951 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-04-18 03:13:20,952 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-04-18 03:13:20,952 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-04-18 03:13:20,955 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-04-18 03:13:20,955 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-04-18 03:13:20,955 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-04-18 03:13:20,956 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-04-18 03:13:20,956 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-04-18 03:13:20,958 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-04-18 03:13:20,958 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-04-18 03:13:20,959 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-04-18 03:13:20,960 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-04-18 03:13:20,962 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-04-18 03:13:20,964 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-04-18 03:13:20,964 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-04-18 03:13:20,966 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-04-18 03:13:20,966 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-04-18 03:13:20,966 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-04-18 03:13:20,967 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-04-18 03:13:20,968 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-04-18 03:13:20,970 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 03:13:20,993 INFO L113 SettingsManager]: Loading preferences was successful [2020-04-18 03:13:20,994 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-04-18 03:13:20,998 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-04-18 03:13:20,998 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-04-18 03:13:20,999 INFO L138 SettingsManager]: * Use SBE=true [2020-04-18 03:13:20,999 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-04-18 03:13:20,999 INFO L138 SettingsManager]: * sizeof long=4 [2020-04-18 03:13:20,999 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-04-18 03:13:20,999 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-04-18 03:13:21,000 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-04-18 03:13:21,000 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-04-18 03:13:21,003 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-04-18 03:13:21,003 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-04-18 03:13:21,004 INFO L138 SettingsManager]: * sizeof long double=12 [2020-04-18 03:13:21,004 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-04-18 03:13:21,004 INFO L138 SettingsManager]: * Use constant arrays=true [2020-04-18 03:13:21,004 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-04-18 03:13:21,004 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-04-18 03:13:21,005 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-04-18 03:13:21,005 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-04-18 03:13:21,005 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-04-18 03:13:21,005 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-04-18 03:13:21,005 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-04-18 03:13:21,006 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-04-18 03:13:21,006 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-04-18 03:13:21,006 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-04-18 03:13:21,008 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-04-18 03:13:21,008 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2020-04-18 03:13:21,009 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-04-18 03:13:21,009 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-04-18 03:13:21,311 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-04-18 03:13:21,332 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-04-18 03:13:21,336 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-04-18 03:13:21,337 INFO L271 PluginConnector]: Initializing CDTParser... [2020-04-18 03:13:21,338 INFO L275 PluginConnector]: CDTParser initialized [2020-04-18 03:13:21,339 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench_longer-1.i [2020-04-18 03:13:21,419 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25b3ad5d3/d389eb4e43aa4f28b9ddf4f6e59d3c41/FLAGa5b136d71 [2020-04-18 03:13:22,024 INFO L306 CDTParser]: Found 1 translation units. [2020-04-18 03:13:22,026 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench_longer-1.i [2020-04-18 03:13:22,038 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25b3ad5d3/d389eb4e43aa4f28b9ddf4f6e59d3c41/FLAGa5b136d71 [2020-04-18 03:13:22,274 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25b3ad5d3/d389eb4e43aa4f28b9ddf4f6e59d3c41 [2020-04-18 03:13:22,284 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-04-18 03:13:22,308 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-04-18 03:13:22,309 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-04-18 03:13:22,310 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-04-18 03:13:22,313 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-04-18 03:13:22,314 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.04 03:13:22" (1/1) ... [2020-04-18 03:13:22,317 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23b8ec48 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 03:13:22,317 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.04 03:13:22" (1/1) ... [2020-04-18 03:13:22,325 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-04-18 03:13:22,374 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-04-18 03:13:22,865 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-04-18 03:13:22,877 INFO L203 MainTranslator]: Completed pre-run [2020-04-18 03:13:22,950 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-04-18 03:13:23,037 INFO L208 MainTranslator]: Completed translation [2020-04-18 03:13:23,037 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:13:23 WrapperNode [2020-04-18 03:13:23,038 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-04-18 03:13:23,038 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-04-18 03:13:23,038 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-04-18 03:13:23,039 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-04-18 03:13:23,047 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 03:13:23,087 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 03:13:23,108 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-04-18 03:13:23,108 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-04-18 03:13:23,108 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-04-18 03:13:23,108 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-04-18 03:13:23,115 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 03:13:23,115 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 03:13:23,118 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 03:13:23,118 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 03:13:23,124 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 03:13:23,128 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 03:13:23,130 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 03:13:23,133 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-04-18 03:13:23,133 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-04-18 03:13:23,133 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-04-18 03:13:23,134 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-04-18 03:13:23,135 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 03:13:23,200 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-04-18 03:13:23,200 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-04-18 03:13:23,201 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-04-18 03:13:23,201 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-04-18 03:13:23,201 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-04-18 03:13:23,201 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-04-18 03:13:23,201 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-04-18 03:13:23,201 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-04-18 03:13:23,202 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-04-18 03:13:23,202 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-04-18 03:13:23,202 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-04-18 03:13:23,204 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 03:13:23,538 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-04-18 03:13:23,539 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-04-18 03:13:23,544 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.04 03:13:23 BoogieIcfgContainer [2020-04-18 03:13:23,544 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-04-18 03:13:23,545 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-04-18 03:13:23,546 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-04-18 03:13:23,551 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-04-18 03:13:23,551 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.04 03:13:22" (1/3) ... [2020-04-18 03:13:23,552 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@259c57b2 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 03:13:23,552 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 03:13:23,553 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@259c57b2 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 03:13:23,553 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 03:13:23,557 INFO L109 eAbstractionObserver]: Analyzing ICFG fib_bench_longer-1.i [2020-04-18 03:13:23,566 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-04-18 03:13:23,567 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-04-18 03:13:23,573 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-04-18 03:13:23,574 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-04-18 03:13:23,602 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,605 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,606 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,606 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,607 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,607 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,608 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,608 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,608 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,609 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,609 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,609 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,610 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,610 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,610 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,611 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,611 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,611 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,612 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,612 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,612 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,613 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,613 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,614 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,614 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,615 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,615 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,615 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,615 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,616 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,620 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,620 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,621 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,621 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,621 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,621 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,628 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,628 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,630 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,630 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,630 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,630 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,646 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-04-18 03:13:23,663 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-04-18 03:13:23,664 INFO L376 AbstractCegarLoop]: Hoare is true [2020-04-18 03:13:23,664 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-04-18 03:13:23,664 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-04-18 03:13:23,664 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-04-18 03:13:23,664 INFO L380 AbstractCegarLoop]: Difference is false [2020-04-18 03:13:23,665 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-04-18 03:13:23,665 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-04-18 03:13:23,676 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 59 places, 57 transitions, 124 flow [2020-04-18 03:13:23,779 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 1741 states. [2020-04-18 03:13:23,782 INFO L276 IsEmpty]: Start isEmpty. Operand 1741 states. [2020-04-18 03:13:23,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-04-18 03:13:23,794 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:13:23,795 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 03:13:23,795 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:13:23,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:13:23,802 INFO L82 PathProgramCache]: Analyzing trace with hash 627590565, now seen corresponding path program 1 times [2020-04-18 03:13:23,812 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:13:23,812 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145749327] [2020-04-18 03:13:23,813 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:13:23,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:13:24,290 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 03:13:24,291 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145749327] [2020-04-18 03:13:24,293 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 03:13:24,293 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-04-18 03:13:24,295 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679652008] [2020-04-18 03:13:24,301 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-04-18 03:13:24,301 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:13:24,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-18 03:13:24,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-04-18 03:13:24,340 INFO L87 Difference]: Start difference. First operand 1741 states. Second operand 6 states. [2020-04-18 03:13:24,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:13:24,668 INFO L93 Difference]: Finished difference Result 3726 states and 10822 transitions. [2020-04-18 03:13:24,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-18 03:13:24,670 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-04-18 03:13:24,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:13:24,697 INFO L225 Difference]: With dead ends: 3726 [2020-04-18 03:13:24,698 INFO L226 Difference]: Without dead ends: 1164 [2020-04-18 03:13:24,699 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 03:13:24,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1164 states. [2020-04-18 03:13:24,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1164 to 899. [2020-04-18 03:13:24,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 899 states. [2020-04-18 03:13:24,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 2439 transitions. [2020-04-18 03:13:24,854 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 2439 transitions. Word has length 22 [2020-04-18 03:13:24,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:13:24,855 INFO L479 AbstractCegarLoop]: Abstraction has 899 states and 2439 transitions. [2020-04-18 03:13:24,856 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-04-18 03:13:24,856 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 2439 transitions. [2020-04-18 03:13:24,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-18 03:13:24,866 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:13:24,866 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 03:13:24,867 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:13:24,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:13:24,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1828680335, now seen corresponding path program 1 times [2020-04-18 03:13:24,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:13:24,868 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955007557] [2020-04-18 03:13:24,868 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:13:24,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:13:25,059 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 03:13:25,059 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955007557] [2020-04-18 03:13:25,059 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 03:13:25,060 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-04-18 03:13:25,060 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203459212] [2020-04-18 03:13:25,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-04-18 03:13:25,062 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:13:25,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-18 03:13:25,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-04-18 03:13:25,063 INFO L87 Difference]: Start difference. First operand 899 states and 2439 transitions. Second operand 7 states. [2020-04-18 03:13:25,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:13:25,361 INFO L93 Difference]: Finished difference Result 2140 states and 5665 transitions. [2020-04-18 03:13:25,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-18 03:13:25,362 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-04-18 03:13:25,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:13:25,375 INFO L225 Difference]: With dead ends: 2140 [2020-04-18 03:13:25,375 INFO L226 Difference]: Without dead ends: 1664 [2020-04-18 03:13:25,376 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2020-04-18 03:13:25,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1664 states. [2020-04-18 03:13:25,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1664 to 1195. [2020-04-18 03:13:25,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1195 states. [2020-04-18 03:13:25,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1195 states to 1195 states and 3244 transitions. [2020-04-18 03:13:25,430 INFO L78 Accepts]: Start accepts. Automaton has 1195 states and 3244 transitions. Word has length 27 [2020-04-18 03:13:25,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:13:25,431 INFO L479 AbstractCegarLoop]: Abstraction has 1195 states and 3244 transitions. [2020-04-18 03:13:25,431 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-04-18 03:13:25,432 INFO L276 IsEmpty]: Start isEmpty. Operand 1195 states and 3244 transitions. [2020-04-18 03:13:25,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-04-18 03:13:25,434 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:13:25,434 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 03:13:25,435 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:13:25,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:13:25,435 INFO L82 PathProgramCache]: Analyzing trace with hash 637689491, now seen corresponding path program 1 times [2020-04-18 03:13:25,436 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:13:25,436 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079870970] [2020-04-18 03:13:25,436 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:13:25,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:13:25,699 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 03:13:25,699 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079870970] [2020-04-18 03:13:25,699 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 03:13:25,700 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-04-18 03:13:25,701 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937218228] [2020-04-18 03:13:25,701 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-04-18 03:13:25,701 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:13:25,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-04-18 03:13:25,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-04-18 03:13:25,702 INFO L87 Difference]: Start difference. First operand 1195 states and 3244 transitions. Second operand 8 states. [2020-04-18 03:13:26,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:13:26,106 INFO L93 Difference]: Finished difference Result 2622 states and 6914 transitions. [2020-04-18 03:13:26,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-18 03:13:26,107 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-04-18 03:13:26,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:13:26,125 INFO L225 Difference]: With dead ends: 2622 [2020-04-18 03:13:26,125 INFO L226 Difference]: Without dead ends: 2146 [2020-04-18 03:13:26,126 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=311, Unknown=0, NotChecked=0, Total=420 [2020-04-18 03:13:26,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2146 states. [2020-04-18 03:13:26,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2146 to 1475. [2020-04-18 03:13:26,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1475 states. [2020-04-18 03:13:26,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1475 states to 1475 states and 3937 transitions. [2020-04-18 03:13:26,186 INFO L78 Accepts]: Start accepts. Automaton has 1475 states and 3937 transitions. Word has length 32 [2020-04-18 03:13:26,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:13:26,187 INFO L479 AbstractCegarLoop]: Abstraction has 1475 states and 3937 transitions. [2020-04-18 03:13:26,188 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-04-18 03:13:26,188 INFO L276 IsEmpty]: Start isEmpty. Operand 1475 states and 3937 transitions. [2020-04-18 03:13:26,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-04-18 03:13:26,191 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:13:26,192 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 03:13:26,192 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:13:26,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:13:26,192 INFO L82 PathProgramCache]: Analyzing trace with hash 1255519260, now seen corresponding path program 1 times [2020-04-18 03:13:26,193 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:13:26,193 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246822580] [2020-04-18 03:13:26,195 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:13:26,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:13:26,427 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 03:13:26,428 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246822580] [2020-04-18 03:13:26,428 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977455558] [2020-04-18 03:13:26,428 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 03:13:26,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:13:26,491 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 03:13:26,497 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:13:26,622 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:13:26,651 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:13:26,693 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 03:13:26,693 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:13:26,694 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2020-04-18 03:13:26,694 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151821840] [2020-04-18 03:13:26,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-18 03:13:26,695 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:13:26,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-18 03:13:26,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2020-04-18 03:13:26,696 INFO L87 Difference]: Start difference. First operand 1475 states and 3937 transitions. Second operand 14 states. [2020-04-18 03:13:27,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:13:27,727 INFO L93 Difference]: Finished difference Result 4280 states and 11155 transitions. [2020-04-18 03:13:27,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-04-18 03:13:27,727 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 37 [2020-04-18 03:13:27,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:13:27,747 INFO L225 Difference]: With dead ends: 4280 [2020-04-18 03:13:27,748 INFO L226 Difference]: Without dead ends: 3240 [2020-04-18 03:13:27,749 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=417, Invalid=1653, Unknown=0, NotChecked=0, Total=2070 [2020-04-18 03:13:27,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3240 states. [2020-04-18 03:13:27,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3240 to 2101. [2020-04-18 03:13:27,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2101 states. [2020-04-18 03:13:27,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2101 states to 2101 states and 5623 transitions. [2020-04-18 03:13:27,822 INFO L78 Accepts]: Start accepts. Automaton has 2101 states and 5623 transitions. Word has length 37 [2020-04-18 03:13:27,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:13:27,823 INFO L479 AbstractCegarLoop]: Abstraction has 2101 states and 5623 transitions. [2020-04-18 03:13:27,823 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-18 03:13:27,823 INFO L276 IsEmpty]: Start isEmpty. Operand 2101 states and 5623 transitions. [2020-04-18 03:13:27,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-04-18 03:13:27,828 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:13:27,828 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 03:13:28,034 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:13:28,034 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:13:28,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:13:28,035 INFO L82 PathProgramCache]: Analyzing trace with hash -520422237, now seen corresponding path program 1 times [2020-04-18 03:13:28,036 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:13:28,036 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861208726] [2020-04-18 03:13:28,037 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:13:28,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:13:28,252 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 03:13:28,253 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861208726] [2020-04-18 03:13:28,253 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253149806] [2020-04-18 03:13:28,253 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 03:13:28,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:13:28,313 INFO L264 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 03:13:28,315 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:13:28,419 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:13:28,485 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:13:28,497 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:13:28,497 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:13:28,497 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2020-04-18 03:13:28,498 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008910238] [2020-04-18 03:13:28,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-18 03:13:28,499 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:13:28,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-18 03:13:28,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-04-18 03:13:28,499 INFO L87 Difference]: Start difference. First operand 2101 states and 5623 transitions. Second operand 16 states. [2020-04-18 03:13:29,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:13:29,698 INFO L93 Difference]: Finished difference Result 4706 states and 12208 transitions. [2020-04-18 03:13:29,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-04-18 03:13:29,699 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 42 [2020-04-18 03:13:29,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:13:29,722 INFO L225 Difference]: With dead ends: 4706 [2020-04-18 03:13:29,723 INFO L226 Difference]: Without dead ends: 4118 [2020-04-18 03:13:29,724 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=402, Invalid=1668, Unknown=0, NotChecked=0, Total=2070 [2020-04-18 03:13:29,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4118 states. [2020-04-18 03:13:29,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4118 to 2314. [2020-04-18 03:13:29,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2314 states. [2020-04-18 03:13:29,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2314 states to 2314 states and 6210 transitions. [2020-04-18 03:13:29,805 INFO L78 Accepts]: Start accepts. Automaton has 2314 states and 6210 transitions. Word has length 42 [2020-04-18 03:13:29,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:13:29,806 INFO L479 AbstractCegarLoop]: Abstraction has 2314 states and 6210 transitions. [2020-04-18 03:13:29,806 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-18 03:13:29,806 INFO L276 IsEmpty]: Start isEmpty. Operand 2314 states and 6210 transitions. [2020-04-18 03:13:29,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-04-18 03:13:29,810 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:13:29,811 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 03:13:30,014 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:13:30,015 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:13:30,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:13:30,016 INFO L82 PathProgramCache]: Analyzing trace with hash -1256086345, now seen corresponding path program 2 times [2020-04-18 03:13:30,016 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:13:30,016 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388138894] [2020-04-18 03:13:30,017 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:13:30,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:13:30,189 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 03:13:30,190 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388138894] [2020-04-18 03:13:30,190 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234160184] [2020-04-18 03:13:30,190 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 03:13:30,266 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 03:13:30,267 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:13:30,268 INFO L264 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 03:13:30,281 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:13:30,466 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:13:30,494 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:13:30,506 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 03:13:30,507 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:13:30,507 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2020-04-18 03:13:30,507 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336168406] [2020-04-18 03:13:30,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-18 03:13:30,510 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:13:30,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-18 03:13:30,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-04-18 03:13:30,511 INFO L87 Difference]: Start difference. First operand 2314 states and 6210 transitions. Second operand 16 states. [2020-04-18 03:13:31,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:13:31,603 INFO L93 Difference]: Finished difference Result 5714 states and 14843 transitions. [2020-04-18 03:13:31,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-04-18 03:13:31,603 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 42 [2020-04-18 03:13:31,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:13:31,627 INFO L225 Difference]: With dead ends: 5714 [2020-04-18 03:13:31,628 INFO L226 Difference]: Without dead ends: 4916 [2020-04-18 03:13:31,629 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=478, Invalid=2072, Unknown=0, NotChecked=0, Total=2550 [2020-04-18 03:13:31,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4916 states. [2020-04-18 03:13:31,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4916 to 2482. [2020-04-18 03:13:31,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2482 states. [2020-04-18 03:13:31,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2482 states to 2482 states and 6650 transitions. [2020-04-18 03:13:31,755 INFO L78 Accepts]: Start accepts. Automaton has 2482 states and 6650 transitions. Word has length 42 [2020-04-18 03:13:31,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:13:31,756 INFO L479 AbstractCegarLoop]: Abstraction has 2482 states and 6650 transitions. [2020-04-18 03:13:31,756 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-18 03:13:31,756 INFO L276 IsEmpty]: Start isEmpty. Operand 2482 states and 6650 transitions. [2020-04-18 03:13:31,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-04-18 03:13:31,762 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:13:31,762 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 03:13:31,966 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:13:31,967 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:13:31,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:13:31,967 INFO L82 PathProgramCache]: Analyzing trace with hash 490795132, now seen corresponding path program 3 times [2020-04-18 03:13:31,968 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:13:31,968 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373513434] [2020-04-18 03:13:31,968 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:13:31,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:13:32,179 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 03:13:32,179 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373513434] [2020-04-18 03:13:32,180 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130556949] [2020-04-18 03:13:32,180 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 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 03:13:32,244 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-04-18 03:13:32,244 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:13:32,246 INFO L264 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-18 03:13:32,248 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:13:32,400 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:13:32,428 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:13:32,437 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 03:13:32,437 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:13:32,438 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2020-04-18 03:13:32,438 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262769539] [2020-04-18 03:13:32,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-18 03:13:32,439 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:13:32,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 03:13:32,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-04-18 03:13:32,440 INFO L87 Difference]: Start difference. First operand 2482 states and 6650 transitions. Second operand 17 states. [2020-04-18 03:13:33,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:13:33,608 INFO L93 Difference]: Finished difference Result 5332 states and 13997 transitions. [2020-04-18 03:13:33,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-04-18 03:13:33,608 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 47 [2020-04-18 03:13:33,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:13:33,621 INFO L225 Difference]: With dead ends: 5332 [2020-04-18 03:13:33,621 INFO L226 Difference]: Without dead ends: 4920 [2020-04-18 03:13:33,623 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=431, Invalid=1825, Unknown=0, NotChecked=0, Total=2256 [2020-04-18 03:13:33,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4920 states. [2020-04-18 03:13:33,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4920 to 2834. [2020-04-18 03:13:33,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2834 states. [2020-04-18 03:13:33,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2834 states to 2834 states and 7724 transitions. [2020-04-18 03:13:33,707 INFO L78 Accepts]: Start accepts. Automaton has 2834 states and 7724 transitions. Word has length 47 [2020-04-18 03:13:33,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:13:33,707 INFO L479 AbstractCegarLoop]: Abstraction has 2834 states and 7724 transitions. [2020-04-18 03:13:33,708 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-18 03:13:33,708 INFO L276 IsEmpty]: Start isEmpty. Operand 2834 states and 7724 transitions. [2020-04-18 03:13:33,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-04-18 03:13:33,714 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:13:33,714 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 03:13:33,923 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:13:33,923 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:13:33,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:13:33,923 INFO L82 PathProgramCache]: Analyzing trace with hash -29094556, now seen corresponding path program 4 times [2020-04-18 03:13:33,924 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:13:33,927 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984944102] [2020-04-18 03:13:33,927 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:13:33,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:13:34,127 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 03:13:34,127 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984944102] [2020-04-18 03:13:34,127 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415147693] [2020-04-18 03:13:34,130 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 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 03:13:34,183 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 03:13:34,183 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:13:34,184 INFO L264 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-18 03:13:34,186 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:13:34,295 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:13:34,307 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:13:34,312 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 03:13:34,312 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:13:34,313 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2020-04-18 03:13:34,313 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091986054] [2020-04-18 03:13:34,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-18 03:13:34,314 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:13:34,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 03:13:34,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-04-18 03:13:34,314 INFO L87 Difference]: Start difference. First operand 2834 states and 7724 transitions. Second operand 17 states. [2020-04-18 03:13:35,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:13:35,560 INFO L93 Difference]: Finished difference Result 6151 states and 16235 transitions. [2020-04-18 03:13:35,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-04-18 03:13:35,561 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 47 [2020-04-18 03:13:35,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:13:35,576 INFO L225 Difference]: With dead ends: 6151 [2020-04-18 03:13:35,576 INFO L226 Difference]: Without dead ends: 5617 [2020-04-18 03:13:35,577 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 848 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=549, Invalid=2313, Unknown=0, NotChecked=0, Total=2862 [2020-04-18 03:13:35,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5617 states. [2020-04-18 03:13:35,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5617 to 2880. [2020-04-18 03:13:35,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2880 states. [2020-04-18 03:13:35,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2880 states to 2880 states and 7895 transitions. [2020-04-18 03:13:35,669 INFO L78 Accepts]: Start accepts. Automaton has 2880 states and 7895 transitions. Word has length 47 [2020-04-18 03:13:35,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:13:35,669 INFO L479 AbstractCegarLoop]: Abstraction has 2880 states and 7895 transitions. [2020-04-18 03:13:35,669 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-18 03:13:35,670 INFO L276 IsEmpty]: Start isEmpty. Operand 2880 states and 7895 transitions. [2020-04-18 03:13:35,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-04-18 03:13:35,675 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:13:35,676 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 03:13:35,879 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:13:35,880 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:13:35,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:13:35,881 INFO L82 PathProgramCache]: Analyzing trace with hash -864451660, now seen corresponding path program 5 times [2020-04-18 03:13:35,881 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:13:35,882 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983092164] [2020-04-18 03:13:35,882 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:13:35,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:13:36,049 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 03:13:36,050 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983092164] [2020-04-18 03:13:36,050 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275577245] [2020-04-18 03:13:36,050 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 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 03:13:36,111 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-18 03:13:36,111 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:13:36,112 INFO L264 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-18 03:13:36,114 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:13:36,252 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:13:36,265 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:13:36,271 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 03:13:36,271 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:13:36,272 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2020-04-18 03:13:36,272 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001937685] [2020-04-18 03:13:36,272 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-18 03:13:36,273 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:13:36,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 03:13:36,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-04-18 03:13:36,273 INFO L87 Difference]: Start difference. First operand 2880 states and 7895 transitions. Second operand 17 states. [2020-04-18 03:13:37,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:13:37,382 INFO L93 Difference]: Finished difference Result 5862 states and 15578 transitions. [2020-04-18 03:13:37,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-04-18 03:13:37,383 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 47 [2020-04-18 03:13:37,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:13:37,395 INFO L225 Difference]: With dead ends: 5862 [2020-04-18 03:13:37,396 INFO L226 Difference]: Without dead ends: 5498 [2020-04-18 03:13:37,397 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=405, Invalid=1665, Unknown=0, NotChecked=0, Total=2070 [2020-04-18 03:13:37,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5498 states. [2020-04-18 03:13:37,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5498 to 2982. [2020-04-18 03:13:37,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2982 states. [2020-04-18 03:13:37,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2982 states to 2982 states and 8270 transitions. [2020-04-18 03:13:37,486 INFO L78 Accepts]: Start accepts. Automaton has 2982 states and 8270 transitions. Word has length 47 [2020-04-18 03:13:37,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:13:37,486 INFO L479 AbstractCegarLoop]: Abstraction has 2982 states and 8270 transitions. [2020-04-18 03:13:37,486 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-18 03:13:37,486 INFO L276 IsEmpty]: Start isEmpty. Operand 2982 states and 8270 transitions. [2020-04-18 03:13:37,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-04-18 03:13:37,492 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:13:37,493 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 03:13:37,695 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:13:37,696 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:13:37,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:13:37,696 INFO L82 PathProgramCache]: Analyzing trace with hash -1080226080, now seen corresponding path program 6 times [2020-04-18 03:13:37,696 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:13:37,696 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083413156] [2020-04-18 03:13:37,697 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:13:37,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:13:37,849 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 03:13:37,849 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083413156] [2020-04-18 03:13:37,850 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141291761] [2020-04-18 03:13:37,850 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 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 03:13:37,903 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-04-18 03:13:37,903 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:13:37,904 INFO L264 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-18 03:13:37,910 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:13:38,069 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:13:38,097 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:13:38,104 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 03:13:38,105 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:13:38,105 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2020-04-18 03:13:38,105 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783207141] [2020-04-18 03:13:38,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-18 03:13:38,106 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:13:38,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 03:13:38,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-04-18 03:13:38,107 INFO L87 Difference]: Start difference. First operand 2982 states and 8270 transitions. Second operand 17 states. [2020-04-18 03:13:39,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:13:39,718 INFO L93 Difference]: Finished difference Result 6066 states and 16212 transitions. [2020-04-18 03:13:39,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-04-18 03:13:39,718 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 47 [2020-04-18 03:13:39,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:13:39,727 INFO L225 Difference]: With dead ends: 6066 [2020-04-18 03:13:39,727 INFO L226 Difference]: Without dead ends: 5702 [2020-04-18 03:13:39,729 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=443, Invalid=1909, Unknown=0, NotChecked=0, Total=2352 [2020-04-18 03:13:39,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5702 states. [2020-04-18 03:13:39,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5702 to 2932. [2020-04-18 03:13:39,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2932 states. [2020-04-18 03:13:39,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2932 states to 2932 states and 8100 transitions. [2020-04-18 03:13:39,814 INFO L78 Accepts]: Start accepts. Automaton has 2932 states and 8100 transitions. Word has length 47 [2020-04-18 03:13:39,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:13:39,815 INFO L479 AbstractCegarLoop]: Abstraction has 2932 states and 8100 transitions. [2020-04-18 03:13:39,815 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-18 03:13:39,815 INFO L276 IsEmpty]: Start isEmpty. Operand 2932 states and 8100 transitions. [2020-04-18 03:13:39,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-04-18 03:13:39,821 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:13:39,821 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 03:13:40,035 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:13:40,035 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:13:40,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:13:40,036 INFO L82 PathProgramCache]: Analyzing trace with hash 728987418, now seen corresponding path program 7 times [2020-04-18 03:13:40,036 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:13:40,036 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548555727] [2020-04-18 03:13:40,037 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:13:40,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:13:40,193 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 03:13:40,193 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548555727] [2020-04-18 03:13:40,193 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670951577] [2020-04-18 03:13:40,194 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 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 03:13:40,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:13:40,253 INFO L264 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-18 03:13:40,255 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:13:40,382 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:13:41,225 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:13:41,233 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 03:13:41,233 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:13:41,233 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-04-18 03:13:41,234 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378384100] [2020-04-18 03:13:41,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-18 03:13:41,234 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:13:41,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-18 03:13:41,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=248, Unknown=2, NotChecked=0, Total=306 [2020-04-18 03:13:41,235 INFO L87 Difference]: Start difference. First operand 2932 states and 8100 transitions. Second operand 18 states. [2020-04-18 03:13:42,117 WARN L192 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2020-04-18 03:13:44,254 WARN L192 SmtUtils]: Spent 656.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2020-04-18 03:13:51,176 WARN L192 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2020-04-18 03:13:59,757 WARN L192 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2020-04-18 03:14:04,478 WARN L192 SmtUtils]: Spent 842.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2020-04-18 03:14:04,705 WARN L192 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-04-18 03:14:04,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:14:04,719 INFO L93 Difference]: Finished difference Result 5924 states and 15695 transitions. [2020-04-18 03:14:04,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-04-18 03:14:04,720 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 47 [2020-04-18 03:14:04,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:14:04,726 INFO L225 Difference]: With dead ends: 5924 [2020-04-18 03:14:04,727 INFO L226 Difference]: Without dead ends: 5560 [2020-04-18 03:14:04,727 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 751 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=518, Invalid=2223, Unknown=15, NotChecked=0, Total=2756 [2020-04-18 03:14:04,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5560 states. [2020-04-18 03:14:04,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5560 to 2922. [2020-04-18 03:14:04,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2922 states. [2020-04-18 03:14:04,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2922 states to 2922 states and 8078 transitions. [2020-04-18 03:14:04,796 INFO L78 Accepts]: Start accepts. Automaton has 2922 states and 8078 transitions. Word has length 47 [2020-04-18 03:14:04,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:14:04,796 INFO L479 AbstractCegarLoop]: Abstraction has 2922 states and 8078 transitions. [2020-04-18 03:14:04,796 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-18 03:14:04,797 INFO L276 IsEmpty]: Start isEmpty. Operand 2922 states and 8078 transitions. [2020-04-18 03:14:04,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-04-18 03:14:04,802 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:14:04,802 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 03:14:05,003 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:14:05,003 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:14:05,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:14:05,004 INFO L82 PathProgramCache]: Analyzing trace with hash -1639823560, now seen corresponding path program 8 times [2020-04-18 03:14:05,004 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:14:05,004 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029641537] [2020-04-18 03:14:05,004 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:14:05,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:14:05,171 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 03:14:05,172 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029641537] [2020-04-18 03:14:05,172 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412632611] [2020-04-18 03:14:05,172 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 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 03:14:05,238 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 03:14:05,238 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:14:05,239 INFO L264 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-18 03:14:05,248 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:14:05,380 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:14:05,401 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:14:05,408 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 03:14:05,409 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:14:05,409 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2020-04-18 03:14:05,409 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312557838] [2020-04-18 03:14:05,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-18 03:14:05,410 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:14:05,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 03:14:05,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2020-04-18 03:14:05,410 INFO L87 Difference]: Start difference. First operand 2922 states and 8078 transitions. Second operand 17 states. [2020-04-18 03:14:06,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:14:06,638 INFO L93 Difference]: Finished difference Result 6066 states and 16149 transitions. [2020-04-18 03:14:06,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-04-18 03:14:06,638 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 47 [2020-04-18 03:14:06,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:14:06,646 INFO L225 Difference]: With dead ends: 6066 [2020-04-18 03:14:06,646 INFO L226 Difference]: Without dead ends: 5532 [2020-04-18 03:14:06,647 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 842 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=526, Invalid=2444, Unknown=0, NotChecked=0, Total=2970 [2020-04-18 03:14:06,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5532 states. [2020-04-18 03:14:06,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5532 to 3136. [2020-04-18 03:14:06,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3136 states. [2020-04-18 03:14:06,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3136 states to 3136 states and 8706 transitions. [2020-04-18 03:14:06,727 INFO L78 Accepts]: Start accepts. Automaton has 3136 states and 8706 transitions. Word has length 47 [2020-04-18 03:14:06,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:14:06,728 INFO L479 AbstractCegarLoop]: Abstraction has 3136 states and 8706 transitions. [2020-04-18 03:14:06,728 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-18 03:14:06,728 INFO L276 IsEmpty]: Start isEmpty. Operand 3136 states and 8706 transitions. [2020-04-18 03:14:06,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-04-18 03:14:06,738 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:14:06,739 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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 03:14:06,950 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:14:06,950 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:14:06,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:14:06,950 INFO L82 PathProgramCache]: Analyzing trace with hash -536445885, now seen corresponding path program 9 times [2020-04-18 03:14:06,951 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:14:06,951 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132676508] [2020-04-18 03:14:06,951 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:14:06,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:14:07,152 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:14:07,153 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132676508] [2020-04-18 03:14:07,153 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877140933] [2020-04-18 03:14:07,153 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 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 03:14:07,200 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-04-18 03:14:07,200 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:14:07,201 INFO L264 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-18 03:14:07,203 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:14:07,349 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:14:07,401 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:14:07,410 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:14:07,411 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:14:07,411 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2020-04-18 03:14:07,411 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460886728] [2020-04-18 03:14:07,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-18 03:14:07,412 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:14:07,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-18 03:14:07,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-04-18 03:14:07,413 INFO L87 Difference]: Start difference. First operand 3136 states and 8706 transitions. Second operand 20 states. [2020-04-18 03:14:09,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:14:09,120 INFO L93 Difference]: Finished difference Result 7558 states and 19829 transitions. [2020-04-18 03:14:09,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-04-18 03:14:09,120 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 52 [2020-04-18 03:14:09,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:14:09,131 INFO L225 Difference]: With dead ends: 7558 [2020-04-18 03:14:09,131 INFO L226 Difference]: Without dead ends: 6970 [2020-04-18 03:14:09,133 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1181 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=730, Invalid=3302, Unknown=0, NotChecked=0, Total=4032 [2020-04-18 03:14:09,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6970 states. [2020-04-18 03:14:09,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6970 to 3486. [2020-04-18 03:14:09,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3486 states. [2020-04-18 03:14:09,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3486 states to 3486 states and 9682 transitions. [2020-04-18 03:14:09,217 INFO L78 Accepts]: Start accepts. Automaton has 3486 states and 9682 transitions. Word has length 52 [2020-04-18 03:14:09,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:14:09,218 INFO L479 AbstractCegarLoop]: Abstraction has 3486 states and 9682 transitions. [2020-04-18 03:14:09,218 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-18 03:14:09,218 INFO L276 IsEmpty]: Start isEmpty. Operand 3486 states and 9682 transitions. [2020-04-18 03:14:09,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-04-18 03:14:09,224 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:14:09,224 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:14:09,428 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:14:09,428 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:14:09,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:14:09,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1056335573, now seen corresponding path program 10 times [2020-04-18 03:14:09,429 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:14:09,429 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253856418] [2020-04-18 03:14:09,429 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:14:09,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:14:09,695 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:14:09,696 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253856418] [2020-04-18 03:14:09,697 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478555307] [2020-04-18 03:14:09,697 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 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 03:14:09,775 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 03:14:09,775 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:14:09,776 INFO L264 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-18 03:14:09,778 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:14:10,462 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~i~0_32 Int)) (and (<= c_~i~0 (+ (* 2 v_~i~0_32) 2)) (<= (div (+ (* v_~i~0_32 (- 1)) 1) (- 2)) 2) (<= c_~j~0 (+ c_~i~0 v_~i~0_32 2)))) is different from true [2020-04-18 03:14:10,464 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:14:10,888 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:14:10,899 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:14:10,900 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:14:10,900 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2020-04-18 03:14:10,900 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054833623] [2020-04-18 03:14:10,900 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-18 03:14:10,901 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:14:10,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-18 03:14:10,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=274, Unknown=2, NotChecked=34, Total=380 [2020-04-18 03:14:10,901 INFO L87 Difference]: Start difference. First operand 3486 states and 9682 transitions. Second operand 20 states. [2020-04-18 03:14:13,788 WARN L192 SmtUtils]: Spent 812.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2020-04-18 03:14:16,380 WARN L192 SmtUtils]: Spent 882.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 33 [2020-04-18 03:14:20,048 WARN L192 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 18 [2020-04-18 03:14:25,657 WARN L192 SmtUtils]: Spent 772.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 29 [2020-04-18 03:14:27,682 WARN L192 SmtUtils]: Spent 814.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 30 [2020-04-18 03:14:33,092 WARN L192 SmtUtils]: Spent 806.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 30 [2020-04-18 03:14:38,781 WARN L192 SmtUtils]: Spent 452.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2020-04-18 03:14:41,595 WARN L192 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2020-04-18 03:14:41,995 WARN L192 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2020-04-18 03:14:43,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:14:43,024 INFO L93 Difference]: Finished difference Result 7596 states and 19944 transitions. [2020-04-18 03:14:43,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-04-18 03:14:43,025 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 52 [2020-04-18 03:14:43,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:14:43,033 INFO L225 Difference]: With dead ends: 7596 [2020-04-18 03:14:43,033 INFO L226 Difference]: Without dead ends: 7162 [2020-04-18 03:14:43,035 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 45 SyntacticMatches, 6 SemanticMatches, 65 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1482 ImplicationChecksByTransitivity, 18.1s TimeCoverageRelationStatistics Valid=820, Invalid=3452, Unknown=22, NotChecked=128, Total=4422 [2020-04-18 03:14:43,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7162 states. [2020-04-18 03:14:43,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7162 to 3758. [2020-04-18 03:14:43,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3758 states. [2020-04-18 03:14:43,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3758 states to 3758 states and 10552 transitions. [2020-04-18 03:14:43,133 INFO L78 Accepts]: Start accepts. Automaton has 3758 states and 10552 transitions. Word has length 52 [2020-04-18 03:14:43,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:14:43,133 INFO L479 AbstractCegarLoop]: Abstraction has 3758 states and 10552 transitions. [2020-04-18 03:14:43,134 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-18 03:14:43,134 INFO L276 IsEmpty]: Start isEmpty. Operand 3758 states and 10552 transitions. [2020-04-18 03:14:43,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-04-18 03:14:43,143 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:14:43,143 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:14:43,344 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:14:43,344 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:14:43,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:14:43,344 INFO L82 PathProgramCache]: Analyzing trace with hash 2088317019, now seen corresponding path program 11 times [2020-04-18 03:14:43,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:14:43,345 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268170524] [2020-04-18 03:14:43,345 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:14:43,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:14:43,532 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:14:43,532 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268170524] [2020-04-18 03:14:43,532 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601113490] [2020-04-18 03:14:43,533 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 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 03:14:43,577 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-04-18 03:14:43,578 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:14:43,579 INFO L264 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-18 03:14:43,580 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:14:43,709 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:14:43,751 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:14:43,759 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:14:43,759 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:14:43,759 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2020-04-18 03:14:43,760 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057805828] [2020-04-18 03:14:43,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-18 03:14:43,760 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:14:43,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-18 03:14:43,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2020-04-18 03:14:43,761 INFO L87 Difference]: Start difference. First operand 3758 states and 10552 transitions. Second operand 20 states. [2020-04-18 03:14:46,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:14:46,182 INFO L93 Difference]: Finished difference Result 8638 states and 22861 transitions. [2020-04-18 03:14:46,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-04-18 03:14:46,182 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 52 [2020-04-18 03:14:46,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:14:46,194 INFO L225 Difference]: With dead ends: 8638 [2020-04-18 03:14:46,195 INFO L226 Difference]: Without dead ends: 7840 [2020-04-18 03:14:46,197 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2070 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1075, Invalid=5087, Unknown=0, NotChecked=0, Total=6162 [2020-04-18 03:14:46,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7840 states. [2020-04-18 03:14:46,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7840 to 4196. [2020-04-18 03:14:46,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4196 states. [2020-04-18 03:14:46,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4196 states to 4196 states and 11680 transitions. [2020-04-18 03:14:46,286 INFO L78 Accepts]: Start accepts. Automaton has 4196 states and 11680 transitions. Word has length 52 [2020-04-18 03:14:46,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:14:46,286 INFO L479 AbstractCegarLoop]: Abstraction has 4196 states and 11680 transitions. [2020-04-18 03:14:46,286 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-18 03:14:46,287 INFO L276 IsEmpty]: Start isEmpty. Operand 4196 states and 11680 transitions. [2020-04-18 03:14:46,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-04-18 03:14:46,294 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:14:46,294 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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 03:14:46,497 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:14:46,498 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:14:46,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:14:46,498 INFO L82 PathProgramCache]: Analyzing trace with hash -2016510169, now seen corresponding path program 12 times [2020-04-18 03:14:46,499 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:14:46,499 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963162505] [2020-04-18 03:14:46,499 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:14:46,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:14:46,691 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:14:46,691 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963162505] [2020-04-18 03:14:46,692 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354691311] [2020-04-18 03:14:46,692 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 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 03:14:46,745 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-04-18 03:14:46,745 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:14:46,746 INFO L264 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-18 03:14:46,749 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:14:46,885 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:14:46,915 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:14:46,922 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:14:46,923 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:14:46,923 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2020-04-18 03:14:46,923 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300517889] [2020-04-18 03:14:46,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-18 03:14:46,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:14:46,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-18 03:14:46,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-04-18 03:14:46,924 INFO L87 Difference]: Start difference. First operand 4196 states and 11680 transitions. Second operand 20 states. [2020-04-18 03:14:49,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:14:49,146 INFO L93 Difference]: Finished difference Result 9546 states and 24912 transitions. [2020-04-18 03:14:49,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-04-18 03:14:49,146 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 52 [2020-04-18 03:14:49,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:14:49,157 INFO L225 Difference]: With dead ends: 9546 [2020-04-18 03:14:49,157 INFO L226 Difference]: Without dead ends: 8836 [2020-04-18 03:14:49,159 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2086 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1112, Invalid=5208, Unknown=0, NotChecked=0, Total=6320 [2020-04-18 03:14:49,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8836 states. [2020-04-18 03:14:49,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8836 to 4321. [2020-04-18 03:14:49,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4321 states. [2020-04-18 03:14:49,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4321 states to 4321 states and 11991 transitions. [2020-04-18 03:14:49,234 INFO L78 Accepts]: Start accepts. Automaton has 4321 states and 11991 transitions. Word has length 52 [2020-04-18 03:14:49,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:14:49,234 INFO L479 AbstractCegarLoop]: Abstraction has 4321 states and 11991 transitions. [2020-04-18 03:14:49,235 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-18 03:14:49,235 INFO L276 IsEmpty]: Start isEmpty. Operand 4321 states and 11991 transitions. [2020-04-18 03:14:49,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-04-18 03:14:49,242 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:14:49,242 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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 03:14:49,445 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:14:49,445 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:14:49,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:14:49,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1754405385, now seen corresponding path program 13 times [2020-04-18 03:14:49,446 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:14:49,447 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352064086] [2020-04-18 03:14:49,447 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:14:49,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:14:49,625 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:14:49,626 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352064086] [2020-04-18 03:14:49,626 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567450183] [2020-04-18 03:14:49,626 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 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 03:14:49,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:14:49,711 INFO L264 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-18 03:14:49,713 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:14:52,087 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:15:00,160 WARN L192 SmtUtils]: Spent 4.03 s on a formula simplification. DAG size of input: 28 DAG size of output: 20 [2020-04-18 03:15:00,161 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:15:00,169 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:15:00,169 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:15:00,169 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2020-04-18 03:15:00,170 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374401494] [2020-04-18 03:15:00,170 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-18 03:15:00,170 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:15:00,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-18 03:15:00,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=305, Unknown=2, NotChecked=0, Total=380 [2020-04-18 03:15:00,171 INFO L87 Difference]: Start difference. First operand 4321 states and 11991 transitions. Second operand 20 states. [2020-04-18 03:15:11,212 WARN L192 SmtUtils]: Spent 2.08 s on a formula simplification. DAG size of input: 45 DAG size of output: 33 [2020-04-18 03:15:18,013 WARN L192 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2020-04-18 03:15:28,636 WARN L192 SmtUtils]: Spent 4.03 s on a formula simplification. DAG size of input: 24 DAG size of output: 23 [2020-04-18 03:15:42,901 WARN L192 SmtUtils]: Spent 4.03 s on a formula simplification. DAG size of input: 27 DAG size of output: 26 [2020-04-18 03:16:11,645 WARN L192 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 39 DAG size of output: 27 [2020-04-18 03:16:51,135 WARN L192 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 34 DAG size of output: 25 Received shutdown request... [2020-04-18 03:18:01,778 WARN L209 SmtUtils]: Removed 2 from assertion stack [2020-04-18 03:18:01,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-04-18 03:18:01,979 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:18:01,980 WARN L544 AbstractCegarLoop]: Verification canceled [2020-04-18 03:18:01,986 WARN L228 ceAbstractionStarter]: Timeout [2020-04-18 03:18:01,986 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.04 03:18:01 BasicIcfg [2020-04-18 03:18:01,987 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-04-18 03:18:01,988 INFO L168 Benchmark]: Toolchain (without parser) took 279702.34 ms. Allocated memory was 144.2 MB in the beginning and 563.6 MB in the end (delta: 419.4 MB). Free memory was 102.5 MB in the beginning and 172.8 MB in the end (delta: -70.3 MB). Peak memory consumption was 349.1 MB. Max. memory is 7.1 GB. [2020-04-18 03:18:01,988 INFO L168 Benchmark]: CDTParser took 1.61 ms. Allocated memory is still 144.2 MB. Free memory was 122.2 MB in the beginning and 122.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-04-18 03:18:01,989 INFO L168 Benchmark]: CACSL2BoogieTranslator took 728.61 ms. Allocated memory was 144.2 MB in the beginning and 203.4 MB in the end (delta: 59.2 MB). Free memory was 100.5 MB in the beginning and 161.0 MB in the end (delta: -60.5 MB). Peak memory consumption was 20.2 MB. Max. memory is 7.1 GB. [2020-04-18 03:18:01,989 INFO L168 Benchmark]: Boogie Procedure Inliner took 69.48 ms. Allocated memory is still 203.4 MB. Free memory was 161.0 MB in the beginning and 158.8 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.2 MB. Max. memory is 7.1 GB. [2020-04-18 03:18:01,989 INFO L168 Benchmark]: Boogie Preprocessor took 24.99 ms. Allocated memory is still 203.4 MB. Free memory was 158.8 MB in the beginning and 157.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-04-18 03:18:01,990 INFO L168 Benchmark]: RCFGBuilder took 410.86 ms. Allocated memory is still 203.4 MB. Free memory was 157.5 MB in the beginning and 137.2 MB in the end (delta: 20.3 MB). Peak memory consumption was 20.3 MB. Max. memory is 7.1 GB. [2020-04-18 03:18:01,990 INFO L168 Benchmark]: TraceAbstraction took 278441.15 ms. Allocated memory was 203.4 MB in the beginning and 563.6 MB in the end (delta: 360.2 MB). Free memory was 136.5 MB in the beginning and 172.8 MB in the end (delta: -36.3 MB). Peak memory consumption was 323.9 MB. Max. memory is 7.1 GB. [2020-04-18 03:18:01,993 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.61 ms. Allocated memory is still 144.2 MB. Free memory was 122.2 MB in the beginning and 122.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 728.61 ms. Allocated memory was 144.2 MB in the beginning and 203.4 MB in the end (delta: 59.2 MB). Free memory was 100.5 MB in the beginning and 161.0 MB in the end (delta: -60.5 MB). Peak memory consumption was 20.2 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 69.48 ms. Allocated memory is still 203.4 MB. Free memory was 161.0 MB in the beginning and 158.8 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 24.99 ms. Allocated memory is still 203.4 MB. Free memory was 158.8 MB in the beginning and 157.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 410.86 ms. Allocated memory is still 203.4 MB. Free memory was 157.5 MB in the beginning and 137.2 MB in the end (delta: 20.3 MB). Peak memory consumption was 20.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 278441.15 ms. Allocated memory was 203.4 MB in the beginning and 563.6 MB in the end (delta: 360.2 MB). Free memory was 136.5 MB in the beginning and 172.8 MB in the end (delta: -36.3 MB). Peak memory consumption was 323.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 711]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 711). Cancelled while BasicCegarLoop was constructing difference of abstraction (4321states) and FLOYD_HOARE automaton (currently 52 states, 20 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 28 for 4036ms.. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 53 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 278.3s, OverallIterations: 17, TraceHistogramMax: 4, AutomataDifference: 254.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 2349 SDtfs, 16681 SDslu, 25071 SDs, 0 SdLazy, 4422 SolverSat, 1192 SolverUnsat, 120 SolverUnknown, 0 SolverNotchecked, 132.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1410 GetRequests, 585 SyntacticMatches, 11 SemanticMatches, 813 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 14042 ImplicationChecksByTransitivity, 125.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=4321occurred in iteration=16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.3s AutomataMinimizationTime, 16 MinimizatonAttempts, 36972 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 17.6s InterpolantComputationTime, 1407 NumberOfCodeBlocks, 1407 NumberOfCodeBlocksAsserted, 53 NumberOfCheckSat, 1376 ConstructedInterpolants, 21 QuantifiedInterpolants, 702241 SizeOfPredicates, 56 NumberOfNonLiveVariables, 1548 ConjunctsInSsa, 169 ConjunctsInUnsatCore, 31 InterpolantComputations, 3 PerfectInterpolantSequences, 0/362 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