/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/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA.epf -i ../../../trunk/examples/svcomp/pthread/fib_bench_longer-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-1d1d2b5 [2020-10-21 22:34:09,706 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-21 22:34:09,710 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-21 22:34:09,752 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-21 22:34:09,753 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-21 22:34:09,761 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-21 22:34:09,764 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-21 22:34:09,768 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-21 22:34:09,771 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-21 22:34:09,774 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-21 22:34:09,774 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-21 22:34:09,775 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-21 22:34:09,776 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-21 22:34:09,779 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-21 22:34:09,781 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-21 22:34:09,783 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-21 22:34:09,785 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-21 22:34:09,786 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-21 22:34:09,787 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-21 22:34:09,795 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-21 22:34:09,798 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-21 22:34:09,799 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-21 22:34:09,800 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-21 22:34:09,801 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-21 22:34:09,814 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-21 22:34:09,814 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-21 22:34:09,815 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-21 22:34:09,815 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-21 22:34:09,816 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-21 22:34:09,817 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-21 22:34:09,817 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-21 22:34:09,819 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-21 22:34:09,820 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-21 22:34:09,821 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-21 22:34:09,822 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-21 22:34:09,822 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-21 22:34:09,823 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-21 22:34:09,823 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-21 22:34:09,823 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-21 22:34:09,825 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-21 22:34:09,826 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-21 22:34:09,827 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA.epf [2020-10-21 22:34:09,867 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-21 22:34:09,868 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-21 22:34:09,869 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-21 22:34:09,869 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-21 22:34:09,870 INFO L138 SettingsManager]: * Use SBE=true [2020-10-21 22:34:09,870 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-21 22:34:09,870 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-21 22:34:09,871 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-21 22:34:09,871 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-21 22:34:09,871 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-21 22:34:09,872 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-21 22:34:09,872 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-21 22:34:09,872 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-21 22:34:09,873 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-21 22:34:09,873 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-21 22:34:09,873 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-21 22:34:09,873 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-21 22:34:09,873 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-21 22:34:09,873 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-21 22:34:09,874 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-21 22:34:09,874 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-21 22:34:09,874 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-21 22:34:09,874 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-21 22:34:09,874 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2020-10-21 22:34:09,875 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-21 22:34:09,875 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-21 22:34:09,875 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-21 22:34:09,875 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-10-21 22:34:09,876 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-21 22:34:10,220 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-21 22:34:10,238 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-21 22:34:10,242 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-21 22:34:10,244 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-21 22:34:10,244 INFO L275 PluginConnector]: CDTParser initialized [2020-10-21 22:34:10,245 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench_longer-1.i [2020-10-21 22:34:10,308 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31a0ed6e9/481680415db148e2b8f36ab2958ac0ba/FLAGd2f051556 [2020-10-21 22:34:10,875 INFO L306 CDTParser]: Found 1 translation units. [2020-10-21 22:34:10,878 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench_longer-1.i [2020-10-21 22:34:10,894 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31a0ed6e9/481680415db148e2b8f36ab2958ac0ba/FLAGd2f051556 [2020-10-21 22:34:11,100 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31a0ed6e9/481680415db148e2b8f36ab2958ac0ba [2020-10-21 22:34:11,108 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-21 22:34:11,114 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-21 22:34:11,115 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-21 22:34:11,115 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-21 22:34:11,119 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-21 22:34:11,120 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 10:34:11" (1/1) ... [2020-10-21 22:34:11,122 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9d1e96c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 10:34:11, skipping insertion in model container [2020-10-21 22:34:11,123 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 10:34:11" (1/1) ... [2020-10-21 22:34:11,130 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-21 22:34:11,188 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-21 22:34:11,621 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-21 22:34:11,632 INFO L203 MainTranslator]: Completed pre-run [2020-10-21 22:34:11,678 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-21 22:34:11,761 INFO L208 MainTranslator]: Completed translation [2020-10-21 22:34:11,761 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 10:34:11 WrapperNode [2020-10-21 22:34:11,762 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-21 22:34:11,762 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-21 22:34:11,763 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-21 22:34:11,763 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-21 22:34:11,772 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 10:34:11" (1/1) ... [2020-10-21 22:34:11,789 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 10:34:11" (1/1) ... [2020-10-21 22:34:11,812 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-21 22:34:11,812 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-21 22:34:11,812 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-21 22:34:11,812 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-21 22:34:11,823 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 10:34:11" (1/1) ... [2020-10-21 22:34:11,823 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 10:34:11" (1/1) ... [2020-10-21 22:34:11,826 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 10:34:11" (1/1) ... [2020-10-21 22:34:11,827 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 10:34:11" (1/1) ... [2020-10-21 22:34:11,833 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 10:34:11" (1/1) ... [2020-10-21 22:34:11,837 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 10:34:11" (1/1) ... [2020-10-21 22:34:11,839 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 10:34:11" (1/1) ... [2020-10-21 22:34:11,842 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-21 22:34:11,843 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-21 22:34:11,843 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-21 22:34:11,843 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-21 22:34:11,844 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 10:34:11" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-21 22:34:11,922 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-10-21 22:34:11,922 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-10-21 22:34:11,922 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-10-21 22:34:11,922 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-10-21 22:34:11,922 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-21 22:34:11,923 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-21 22:34:11,923 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-21 22:34:11,923 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-21 22:34:11,924 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-21 22:34:11,924 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-21 22:34:11,925 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-21 22:34:11,925 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-21 22:34:11,929 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-21 22:34:12,312 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-21 22:34:12,312 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-21 22:34:12,315 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 10:34:12 BoogieIcfgContainer [2020-10-21 22:34:12,315 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-21 22:34:12,317 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-21 22:34:12,317 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-21 22:34:12,320 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-21 22:34:12,321 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 10:34:11" (1/3) ... [2020-10-21 22:34:12,322 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b9b6a28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 10:34:12, skipping insertion in model container [2020-10-21 22:34:12,322 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 10:34:11" (2/3) ... [2020-10-21 22:34:12,322 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b9b6a28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 10:34:12, skipping insertion in model container [2020-10-21 22:34:12,323 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 10:34:12" (3/3) ... [2020-10-21 22:34:12,324 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_bench_longer-1.i [2020-10-21 22:34:12,334 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-21 22:34:12,334 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-21 22:34:12,341 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-21 22:34:12,342 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-21 22:34:12,367 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,367 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,368 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,368 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,369 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,369 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,369 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,369 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,370 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,370 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,370 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,371 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,371 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,371 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,371 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,372 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,372 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,372 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,373 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,373 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,373 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,374 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,374 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,374 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,375 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,375 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,375 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,376 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,376 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,376 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,380 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,380 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,380 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,381 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,381 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,381 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,390 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,390 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,391 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,391 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,391 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,391 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 22:34:12,394 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-10-21 22:34:12,407 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-21 22:34:12,425 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-21 22:34:12,425 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-21 22:34:12,426 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-21 22:34:12,426 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-21 22:34:12,426 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-21 22:34:12,426 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-21 22:34:12,426 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-21 22:34:12,426 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-21 22:34:12,439 INFO L137 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2020-10-21 22:34:12,440 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 67 places, 66 transitions, 142 flow [2020-10-21 22:34:12,443 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 67 places, 66 transitions, 142 flow [2020-10-21 22:34:12,444 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 67 places, 66 transitions, 142 flow [2020-10-21 22:34:12,485 INFO L129 PetriNetUnfolder]: 6/64 cut-off events. [2020-10-21 22:34:12,485 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-21 22:34:12,491 INFO L80 FinitePrefix]: Finished finitePrefix Result has 71 conditions, 64 events. 6/64 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 107 event pairs, 0 based on Foata normal form. 0/57 useless extension candidates. Maximal degree in co-relation 48. Up to 2 conditions per place. [2020-10-21 22:34:12,494 INFO L116 LiptonReduction]: Number of co-enabled transitions 1272 [2020-10-21 22:34:13,639 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-10-21 22:34:14,078 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 87 [2020-10-21 22:34:14,217 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-10-21 22:34:14,262 INFO L131 LiptonReduction]: Checked pairs total: 1183 [2020-10-21 22:34:14,263 INFO L133 LiptonReduction]: Total number of compositions: 65 [2020-10-21 22:34:14,271 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 16 transitions, 42 flow [2020-10-21 22:34:14,282 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-10-21 22:34:14,285 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-10-21 22:34:14,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-21 22:34:14,292 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:34:14,293 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-21 22:34:14,294 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:34:14,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:34:14,299 INFO L82 PathProgramCache]: Analyzing trace with hash -542844556, now seen corresponding path program 1 times [2020-10-21 22:34:14,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:34:14,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215009082] [2020-10-21 22:34:14,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:34:14,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:34:14,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:14,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215009082] [2020-10-21 22:34:14,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-21 22:34:14,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-21 22:34:14,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793568576] [2020-10-21 22:34:14,655 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-21 22:34:14,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:34:14,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-21 22:34:14,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-21 22:34:14,674 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-10-21 22:34:14,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:34:14,747 INFO L93 Difference]: Finished difference Result 83 states and 212 transitions. [2020-10-21 22:34:14,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-21 22:34:14,749 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-10-21 22:34:14,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:34:14,761 INFO L225 Difference]: With dead ends: 83 [2020-10-21 22:34:14,762 INFO L226 Difference]: Without dead ends: 54 [2020-10-21 22:34:14,763 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-21 22:34:14,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-21 22:34:14,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2020-10-21 22:34:14,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-21 22:34:14,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 120 transitions. [2020-10-21 22:34:14,806 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 120 transitions. Word has length 6 [2020-10-21 22:34:14,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:34:14,806 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 120 transitions. [2020-10-21 22:34:14,806 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-21 22:34:14,807 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 120 transitions. [2020-10-21 22:34:14,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-21 22:34:14,808 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:34:14,808 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:34:14,808 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-21 22:34:14,808 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:34:14,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:34:14,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1940739433, now seen corresponding path program 1 times [2020-10-21 22:34:14,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:34:14,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829059427] [2020-10-21 22:34:14,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:34:14,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:34:14,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:14,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829059427] [2020-10-21 22:34:14,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-21 22:34:14,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-21 22:34:14,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54055304] [2020-10-21 22:34:14,905 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-21 22:34:14,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:34:14,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-21 22:34:14,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-21 22:34:14,906 INFO L87 Difference]: Start difference. First operand 50 states and 120 transitions. Second operand 5 states. [2020-10-21 22:34:14,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:34:14,964 INFO L93 Difference]: Finished difference Result 80 states and 186 transitions. [2020-10-21 22:34:14,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-21 22:34:14,965 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-21 22:34:14,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:34:14,967 INFO L225 Difference]: With dead ends: 80 [2020-10-21 22:34:14,967 INFO L226 Difference]: Without dead ends: 75 [2020-10-21 22:34:14,968 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-21 22:34:14,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-21 22:34:14,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 55. [2020-10-21 22:34:14,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-21 22:34:14,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 136 transitions. [2020-10-21 22:34:14,979 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 136 transitions. Word has length 8 [2020-10-21 22:34:14,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:34:14,980 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 136 transitions. [2020-10-21 22:34:14,980 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-21 22:34:14,980 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 136 transitions. [2020-10-21 22:34:14,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-21 22:34:14,981 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:34:14,981 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:34:14,982 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-21 22:34:14,982 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:34:14,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:34:14,982 INFO L82 PathProgramCache]: Analyzing trace with hash -1981941347, now seen corresponding path program 1 times [2020-10-21 22:34:14,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:34:14,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872183415] [2020-10-21 22:34:14,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:34:15,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:34:15,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:15,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872183415] [2020-10-21 22:34:15,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-21 22:34:15,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-21 22:34:15,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881816309] [2020-10-21 22:34:15,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-21 22:34:15,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:34:15,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-21 22:34:15,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-21 22:34:15,051 INFO L87 Difference]: Start difference. First operand 55 states and 136 transitions. Second operand 5 states. [2020-10-21 22:34:15,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:34:15,110 INFO L93 Difference]: Finished difference Result 83 states and 196 transitions. [2020-10-21 22:34:15,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-21 22:34:15,110 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-21 22:34:15,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:34:15,112 INFO L225 Difference]: With dead ends: 83 [2020-10-21 22:34:15,112 INFO L226 Difference]: Without dead ends: 77 [2020-10-21 22:34:15,113 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-21 22:34:15,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-21 22:34:15,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 66. [2020-10-21 22:34:15,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-21 22:34:15,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 157 transitions. [2020-10-21 22:34:15,123 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 157 transitions. Word has length 8 [2020-10-21 22:34:15,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:34:15,124 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 157 transitions. [2020-10-21 22:34:15,124 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-21 22:34:15,124 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 157 transitions. [2020-10-21 22:34:15,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-21 22:34:15,126 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:34:15,126 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:34:15,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-21 22:34:15,126 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:34:15,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:34:15,127 INFO L82 PathProgramCache]: Analyzing trace with hash -33351122, now seen corresponding path program 2 times [2020-10-21 22:34:15,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:34:15,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974514787] [2020-10-21 22:34:15,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:34:15,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:34:15,226 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:15,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974514787] [2020-10-21 22:34:15,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868323139] [2020-10-21 22:34:15,227 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:34:15,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 22:34:15,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:34:15,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-21 22:34:15,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:34:15,427 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:34:15,456 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:15,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:34:15,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2020-10-21 22:34:15,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143009602] [2020-10-21 22:34:15,459 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-21 22:34:15,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:34:15,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-21 22:34:15,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-21 22:34:15,460 INFO L87 Difference]: Start difference. First operand 66 states and 157 transitions. Second operand 10 states. [2020-10-21 22:34:15,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:34:15,555 INFO L93 Difference]: Finished difference Result 101 states and 235 transitions. [2020-10-21 22:34:15,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-21 22:34:15,558 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2020-10-21 22:34:15,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:34:15,560 INFO L225 Difference]: With dead ends: 101 [2020-10-21 22:34:15,563 INFO L226 Difference]: Without dead ends: 96 [2020-10-21 22:34:15,563 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-10-21 22:34:15,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-21 22:34:15,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2020-10-21 22:34:15,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-21 22:34:15,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 173 transitions. [2020-10-21 22:34:15,584 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 173 transitions. Word has length 9 [2020-10-21 22:34:15,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:34:15,584 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 173 transitions. [2020-10-21 22:34:15,584 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-21 22:34:15,584 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 173 transitions. [2020-10-21 22:34:15,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-21 22:34:15,585 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:34:15,585 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:34:15,800 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:34:15,801 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:34:15,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:34:15,802 INFO L82 PathProgramCache]: Analyzing trace with hash -1310611417, now seen corresponding path program 2 times [2020-10-21 22:34:15,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:34:15,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128461501] [2020-10-21 22:34:15,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:34:15,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:34:15,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:15,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128461501] [2020-10-21 22:34:15,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839217147] [2020-10-21 22:34:15,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:34:15,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 22:34:15,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:34:15,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-21 22:34:15,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:34:15,987 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 22:34:15,999 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:16,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:34:16,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-21 22:34:16,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838487999] [2020-10-21 22:34:16,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-21 22:34:16,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:34:16,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-21 22:34:16,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-21 22:34:16,002 INFO L87 Difference]: Start difference. First operand 71 states and 173 transitions. Second operand 9 states. [2020-10-21 22:34:16,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:34:16,110 INFO L93 Difference]: Finished difference Result 96 states and 231 transitions. [2020-10-21 22:34:16,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-21 22:34:16,111 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-10-21 22:34:16,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:34:16,112 INFO L225 Difference]: With dead ends: 96 [2020-10-21 22:34:16,112 INFO L226 Difference]: Without dead ends: 90 [2020-10-21 22:34:16,113 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2020-10-21 22:34:16,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-21 22:34:16,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 77. [2020-10-21 22:34:16,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-21 22:34:16,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 190 transitions. [2020-10-21 22:34:16,121 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 190 transitions. Word has length 9 [2020-10-21 22:34:16,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:34:16,122 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 190 transitions. [2020-10-21 22:34:16,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-21 22:34:16,122 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 190 transitions. [2020-10-21 22:34:16,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-21 22:34:16,123 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:34:16,123 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:34:16,336 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:34:16,337 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:34:16,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:34:16,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1043120626, now seen corresponding path program 1 times [2020-10-21 22:34:16,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:34:16,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618472306] [2020-10-21 22:34:16,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:34:16,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:34:16,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:16,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618472306] [2020-10-21 22:34:16,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-21 22:34:16,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-21 22:34:16,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387844903] [2020-10-21 22:34:16,425 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-21 22:34:16,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:34:16,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-21 22:34:16,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-21 22:34:16,426 INFO L87 Difference]: Start difference. First operand 77 states and 190 transitions. Second operand 6 states. [2020-10-21 22:34:16,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:34:16,505 INFO L93 Difference]: Finished difference Result 103 states and 242 transitions. [2020-10-21 22:34:16,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-21 22:34:16,506 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-21 22:34:16,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:34:16,507 INFO L225 Difference]: With dead ends: 103 [2020-10-21 22:34:16,507 INFO L226 Difference]: Without dead ends: 98 [2020-10-21 22:34:16,508 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-21 22:34:16,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-21 22:34:16,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 78. [2020-10-21 22:34:16,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-21 22:34:16,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 191 transitions. [2020-10-21 22:34:16,524 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 191 transitions. Word has length 10 [2020-10-21 22:34:16,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:34:16,525 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 191 transitions. [2020-10-21 22:34:16,525 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-21 22:34:16,526 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 191 transitions. [2020-10-21 22:34:16,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-21 22:34:16,527 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:34:16,527 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:34:16,528 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-21 22:34:16,528 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:34:16,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:34:16,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1043091796, now seen corresponding path program 2 times [2020-10-21 22:34:16,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:34:16,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430074463] [2020-10-21 22:34:16,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:34:16,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:34:16,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:16,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430074463] [2020-10-21 22:34:16,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-21 22:34:16,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-21 22:34:16,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151551689] [2020-10-21 22:34:16,584 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-21 22:34:16,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:34:16,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-21 22:34:16,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-21 22:34:16,585 INFO L87 Difference]: Start difference. First operand 78 states and 191 transitions. Second operand 6 states. [2020-10-21 22:34:16,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:34:16,666 INFO L93 Difference]: Finished difference Result 103 states and 242 transitions. [2020-10-21 22:34:16,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-21 22:34:16,666 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-21 22:34:16,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:34:16,667 INFO L225 Difference]: With dead ends: 103 [2020-10-21 22:34:16,668 INFO L226 Difference]: Without dead ends: 98 [2020-10-21 22:34:16,668 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-21 22:34:16,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-21 22:34:16,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 82. [2020-10-21 22:34:16,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-21 22:34:16,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 194 transitions. [2020-10-21 22:34:16,676 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 194 transitions. Word has length 10 [2020-10-21 22:34:16,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:34:16,676 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 194 transitions. [2020-10-21 22:34:16,676 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-21 22:34:16,676 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 194 transitions. [2020-10-21 22:34:16,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-21 22:34:16,677 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:34:16,677 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:34:16,677 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-21 22:34:16,678 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:34:16,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:34:16,678 INFO L82 PathProgramCache]: Analyzing trace with hash -1033855625, now seen corresponding path program 3 times [2020-10-21 22:34:16,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:34:16,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410255165] [2020-10-21 22:34:16,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:34:16,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:34:16,806 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:16,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410255165] [2020-10-21 22:34:16,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255041296] [2020-10-21 22:34:16,807 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:34:16,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-21 22:34:16,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:34:16,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-21 22:34:16,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:34:16,933 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:34:16,955 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:16,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:34:16,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-10-21 22:34:16,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559698547] [2020-10-21 22:34:16,957 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-21 22:34:16,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:34:16,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-21 22:34:16,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-10-21 22:34:16,958 INFO L87 Difference]: Start difference. First operand 82 states and 194 transitions. Second operand 12 states. [2020-10-21 22:34:17,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:34:17,069 INFO L93 Difference]: Finished difference Result 122 states and 284 transitions. [2020-10-21 22:34:17,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-21 22:34:17,069 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 10 [2020-10-21 22:34:17,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:34:17,070 INFO L225 Difference]: With dead ends: 122 [2020-10-21 22:34:17,071 INFO L226 Difference]: Without dead ends: 117 [2020-10-21 22:34:17,071 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-10-21 22:34:17,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-21 22:34:17,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 88. [2020-10-21 22:34:17,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-21 22:34:17,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 215 transitions. [2020-10-21 22:34:17,078 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 215 transitions. Word has length 10 [2020-10-21 22:34:17,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:34:17,079 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 215 transitions. [2020-10-21 22:34:17,079 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-21 22:34:17,079 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 215 transitions. [2020-10-21 22:34:17,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-21 22:34:17,080 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:34:17,080 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:34:17,294 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:34:17,295 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:34:17,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:34:17,295 INFO L82 PathProgramCache]: Analyzing trace with hash -1974220067, now seen corresponding path program 3 times [2020-10-21 22:34:17,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:34:17,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868358218] [2020-10-21 22:34:17,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:34:17,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:34:17,375 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:17,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868358218] [2020-10-21 22:34:17,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919946978] [2020-10-21 22:34:17,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:34:17,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-21 22:34:17,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:34:17,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-21 22:34:17,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:34:17,539 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 22:34:17,556 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:17,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:34:17,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-21 22:34:17,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799848607] [2020-10-21 22:34:17,558 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-21 22:34:17,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:34:17,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-21 22:34:17,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-21 22:34:17,559 INFO L87 Difference]: Start difference. First operand 88 states and 215 transitions. Second operand 11 states. [2020-10-21 22:34:17,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:34:17,698 INFO L93 Difference]: Finished difference Result 121 states and 288 transitions. [2020-10-21 22:34:17,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-21 22:34:17,698 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-10-21 22:34:17,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:34:17,700 INFO L225 Difference]: With dead ends: 121 [2020-10-21 22:34:17,701 INFO L226 Difference]: Without dead ends: 115 [2020-10-21 22:34:17,701 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-10-21 22:34:17,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-21 22:34:17,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 94. [2020-10-21 22:34:17,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-21 22:34:17,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 232 transitions. [2020-10-21 22:34:17,713 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 232 transitions. Word has length 10 [2020-10-21 22:34:17,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:34:17,715 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 232 transitions. [2020-10-21 22:34:17,715 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-21 22:34:17,715 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 232 transitions. [2020-10-21 22:34:17,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-21 22:34:17,719 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:34:17,719 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:34:17,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:34:17,934 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:34:17,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:34:17,935 INFO L82 PathProgramCache]: Analyzing trace with hash 2022998328, now seen corresponding path program 3 times [2020-10-21 22:34:17,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:34:17,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814070959] [2020-10-21 22:34:17,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:34:17,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:34:18,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:18,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814070959] [2020-10-21 22:34:18,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702226839] [2020-10-21 22:34:18,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:34:18,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-21 22:34:18,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:34:18,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-21 22:34:18,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:34:18,157 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:34:18,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:18,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:34:18,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-21 22:34:18,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845413231] [2020-10-21 22:34:18,170 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-21 22:34:18,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:34:18,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-21 22:34:18,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-21 22:34:18,171 INFO L87 Difference]: Start difference. First operand 94 states and 232 transitions. Second operand 11 states. [2020-10-21 22:34:18,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:34:18,388 INFO L93 Difference]: Finished difference Result 121 states and 289 transitions. [2020-10-21 22:34:18,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-21 22:34:18,389 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-21 22:34:18,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:34:18,393 INFO L225 Difference]: With dead ends: 121 [2020-10-21 22:34:18,393 INFO L226 Difference]: Without dead ends: 116 [2020-10-21 22:34:18,394 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-21 22:34:18,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-21 22:34:18,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 94. [2020-10-21 22:34:18,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-21 22:34:18,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 232 transitions. [2020-10-21 22:34:18,404 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 232 transitions. Word has length 11 [2020-10-21 22:34:18,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:34:18,405 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 232 transitions. [2020-10-21 22:34:18,405 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-21 22:34:18,405 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 232 transitions. [2020-10-21 22:34:18,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-21 22:34:18,406 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:34:18,406 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:34:18,606 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-10-21 22:34:18,607 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:34:18,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:34:18,608 INFO L82 PathProgramCache]: Analyzing trace with hash 2023027158, now seen corresponding path program 4 times [2020-10-21 22:34:18,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:34:18,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063675789] [2020-10-21 22:34:18,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:34:18,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:34:18,689 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:18,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063675789] [2020-10-21 22:34:18,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526895716] [2020-10-21 22:34:18,690 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:34:18,747 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 22:34:18,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:34:18,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-21 22:34:18,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:34:18,812 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 22:34:18,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:18,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:34:18,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-21 22:34:18,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120696044] [2020-10-21 22:34:18,823 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-21 22:34:18,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:34:18,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-21 22:34:18,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-21 22:34:18,824 INFO L87 Difference]: Start difference. First operand 94 states and 232 transitions. Second operand 11 states. [2020-10-21 22:34:19,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:34:19,039 INFO L93 Difference]: Finished difference Result 131 states and 313 transitions. [2020-10-21 22:34:19,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-21 22:34:19,039 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-21 22:34:19,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:34:19,041 INFO L225 Difference]: With dead ends: 131 [2020-10-21 22:34:19,041 INFO L226 Difference]: Without dead ends: 126 [2020-10-21 22:34:19,041 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2020-10-21 22:34:19,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-21 22:34:19,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 95. [2020-10-21 22:34:19,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-21 22:34:19,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 237 transitions. [2020-10-21 22:34:19,047 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 237 transitions. Word has length 11 [2020-10-21 22:34:19,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:34:19,047 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 237 transitions. [2020-10-21 22:34:19,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-21 22:34:19,047 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 237 transitions. [2020-10-21 22:34:19,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-21 22:34:19,048 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:34:19,048 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:34:19,260 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:34:19,261 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:34:19,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:34:19,261 INFO L82 PathProgramCache]: Analyzing trace with hash 2023028119, now seen corresponding path program 5 times [2020-10-21 22:34:19,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:34:19,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629159295] [2020-10-21 22:34:19,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:34:19,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:34:19,323 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:19,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629159295] [2020-10-21 22:34:19,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675528537] [2020-10-21 22:34:19,324 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:34:19,384 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 22:34:19,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:34:19,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-21 22:34:19,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:34:19,460 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:34:19,470 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:19,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:34:19,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-21 22:34:19,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129835263] [2020-10-21 22:34:19,471 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-21 22:34:19,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:34:19,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-21 22:34:19,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-21 22:34:19,472 INFO L87 Difference]: Start difference. First operand 95 states and 237 transitions. Second operand 11 states. [2020-10-21 22:34:19,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:34:19,640 INFO L93 Difference]: Finished difference Result 126 states and 297 transitions. [2020-10-21 22:34:19,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-21 22:34:19,640 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-21 22:34:19,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:34:19,642 INFO L225 Difference]: With dead ends: 126 [2020-10-21 22:34:19,642 INFO L226 Difference]: Without dead ends: 121 [2020-10-21 22:34:19,642 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-21 22:34:19,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-21 22:34:19,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 95. [2020-10-21 22:34:19,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-21 22:34:19,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 233 transitions. [2020-10-21 22:34:19,647 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 233 transitions. Word has length 11 [2020-10-21 22:34:19,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:34:19,647 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 233 transitions. [2020-10-21 22:34:19,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-21 22:34:19,647 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 233 transitions. [2020-10-21 22:34:19,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-21 22:34:19,648 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:34:19,648 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:34:19,857 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:34:19,857 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:34:19,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:34:19,859 INFO L82 PathProgramCache]: Analyzing trace with hash 2023920888, now seen corresponding path program 6 times [2020-10-21 22:34:19,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:34:19,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238807307] [2020-10-21 22:34:19,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:34:19,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:34:19,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:19,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238807307] [2020-10-21 22:34:19,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205950534] [2020-10-21 22:34:19,918 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:34:19,982 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-21 22:34:19,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:34:19,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-21 22:34:19,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:34:20,071 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 22:34:20,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:20,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:34:20,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-21 22:34:20,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510228823] [2020-10-21 22:34:20,083 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-21 22:34:20,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:34:20,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-21 22:34:20,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-21 22:34:20,084 INFO L87 Difference]: Start difference. First operand 95 states and 233 transitions. Second operand 11 states. [2020-10-21 22:34:20,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:34:20,239 INFO L93 Difference]: Finished difference Result 127 states and 304 transitions. [2020-10-21 22:34:20,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-21 22:34:20,240 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-21 22:34:20,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:34:20,241 INFO L225 Difference]: With dead ends: 127 [2020-10-21 22:34:20,241 INFO L226 Difference]: Without dead ends: 122 [2020-10-21 22:34:20,242 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-21 22:34:20,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-21 22:34:20,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 97. [2020-10-21 22:34:20,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-21 22:34:20,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 241 transitions. [2020-10-21 22:34:20,246 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 241 transitions. Word has length 11 [2020-10-21 22:34:20,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:34:20,246 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 241 transitions. [2020-10-21 22:34:20,247 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-21 22:34:20,247 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 241 transitions. [2020-10-21 22:34:20,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-21 22:34:20,247 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:34:20,247 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:34:20,458 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-21 22:34:20,459 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:34:20,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:34:20,459 INFO L82 PathProgramCache]: Analyzing trace with hash 2023921849, now seen corresponding path program 7 times [2020-10-21 22:34:20,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:34:20,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799229689] [2020-10-21 22:34:20,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:34:20,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:34:20,536 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:20,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799229689] [2020-10-21 22:34:20,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216783516] [2020-10-21 22:34:20,537 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:34:20,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:34:20,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-21 22:34:20,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:34:20,650 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:34:20,661 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:20,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:34:20,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-21 22:34:20,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514050437] [2020-10-21 22:34:20,663 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-21 22:34:20,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:34:20,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-21 22:34:20,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-21 22:34:20,663 INFO L87 Difference]: Start difference. First operand 97 states and 241 transitions. Second operand 11 states. [2020-10-21 22:34:20,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:34:20,887 INFO L93 Difference]: Finished difference Result 141 states and 331 transitions. [2020-10-21 22:34:20,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-21 22:34:20,887 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-21 22:34:20,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:34:20,888 INFO L225 Difference]: With dead ends: 141 [2020-10-21 22:34:20,888 INFO L226 Difference]: Without dead ends: 136 [2020-10-21 22:34:20,889 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2020-10-21 22:34:20,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-21 22:34:20,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 96. [2020-10-21 22:34:20,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-21 22:34:20,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 236 transitions. [2020-10-21 22:34:20,894 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 236 transitions. Word has length 11 [2020-10-21 22:34:20,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:34:20,894 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 236 transitions. [2020-10-21 22:34:20,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-21 22:34:20,895 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 236 transitions. [2020-10-21 22:34:20,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-21 22:34:20,895 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:34:20,895 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:34:21,103 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:34:21,104 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:34:21,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:34:21,105 INFO L82 PathProgramCache]: Analyzing trace with hash 2023950679, now seen corresponding path program 8 times [2020-10-21 22:34:21,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:34:21,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065179308] [2020-10-21 22:34:21,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:34:21,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:34:21,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:21,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065179308] [2020-10-21 22:34:21,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434237050] [2020-10-21 22:34:21,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:34:21,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 22:34:21,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:34:21,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-21 22:34:21,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:34:21,302 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 22:34:21,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:21,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:34:21,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-21 22:34:21,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164942557] [2020-10-21 22:34:21,345 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-21 22:34:21,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:34:21,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-21 22:34:21,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-21 22:34:21,346 INFO L87 Difference]: Start difference. First operand 96 states and 236 transitions. Second operand 11 states. [2020-10-21 22:34:21,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:34:21,525 INFO L93 Difference]: Finished difference Result 131 states and 307 transitions. [2020-10-21 22:34:21,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-21 22:34:21,526 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-21 22:34:21,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:34:21,527 INFO L225 Difference]: With dead ends: 131 [2020-10-21 22:34:21,527 INFO L226 Difference]: Without dead ends: 126 [2020-10-21 22:34:21,528 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-21 22:34:21,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-21 22:34:21,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 98. [2020-10-21 22:34:21,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-21 22:34:21,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 231 transitions. [2020-10-21 22:34:21,534 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 231 transitions. Word has length 11 [2020-10-21 22:34:21,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:34:21,535 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 231 transitions. [2020-10-21 22:34:21,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-21 22:34:21,535 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 231 transitions. [2020-10-21 22:34:21,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-21 22:34:21,535 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:34:21,536 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:34:21,745 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-21 22:34:21,746 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:34:21,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:34:21,747 INFO L82 PathProgramCache]: Analyzing trace with hash -1984724146, now seen corresponding path program 4 times [2020-10-21 22:34:21,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:34:21,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064570272] [2020-10-21 22:34:21,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:34:21,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:34:21,823 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:21,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064570272] [2020-10-21 22:34:21,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799722548] [2020-10-21 22:34:21,824 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:34:21,883 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 22:34:21,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:34:21,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-21 22:34:21,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:34:21,971 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:34:21,992 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:21,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:34:21,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-10-21 22:34:21,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492595583] [2020-10-21 22:34:21,993 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-21 22:34:21,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:34:21,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-21 22:34:21,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-10-21 22:34:21,994 INFO L87 Difference]: Start difference. First operand 98 states and 231 transitions. Second operand 14 states. [2020-10-21 22:34:22,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:34:22,105 INFO L93 Difference]: Finished difference Result 143 states and 333 transitions. [2020-10-21 22:34:22,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-21 22:34:22,106 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2020-10-21 22:34:22,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:34:22,107 INFO L225 Difference]: With dead ends: 143 [2020-10-21 22:34:22,107 INFO L226 Difference]: Without dead ends: 138 [2020-10-21 22:34:22,108 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2020-10-21 22:34:22,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-21 22:34:22,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 105. [2020-10-21 22:34:22,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-21 22:34:22,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 257 transitions. [2020-10-21 22:34:22,112 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 257 transitions. Word has length 11 [2020-10-21 22:34:22,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:34:22,112 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 257 transitions. [2020-10-21 22:34:22,113 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-21 22:34:22,113 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 257 transitions. [2020-10-21 22:34:22,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-21 22:34:22,113 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:34:22,113 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:34:22,314 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-21 22:34:22,314 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:34:22,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:34:22,315 INFO L82 PathProgramCache]: Analyzing trace with hash -1071251737, now seen corresponding path program 4 times [2020-10-21 22:34:22,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:34:22,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017297103] [2020-10-21 22:34:22,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:34:22,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:34:22,382 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:22,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017297103] [2020-10-21 22:34:22,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690334659] [2020-10-21 22:34:22,383 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:34:22,431 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 22:34:22,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:34:22,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-21 22:34:22,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:34:22,516 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 22:34:22,527 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:22,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:34:22,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-21 22:34:22,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35201846] [2020-10-21 22:34:22,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-21 22:34:22,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:34:22,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-21 22:34:22,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-21 22:34:22,530 INFO L87 Difference]: Start difference. First operand 105 states and 257 transitions. Second operand 13 states. [2020-10-21 22:34:22,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:34:22,679 INFO L93 Difference]: Finished difference Result 147 states and 350 transitions. [2020-10-21 22:34:22,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-21 22:34:22,680 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-21 22:34:22,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:34:22,681 INFO L225 Difference]: With dead ends: 147 [2020-10-21 22:34:22,681 INFO L226 Difference]: Without dead ends: 141 [2020-10-21 22:34:22,682 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2020-10-21 22:34:22,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-21 22:34:22,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 113. [2020-10-21 22:34:22,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-21 22:34:22,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 282 transitions. [2020-10-21 22:34:22,688 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 282 transitions. Word has length 11 [2020-10-21 22:34:22,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:34:22,688 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 282 transitions. [2020-10-21 22:34:22,688 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-21 22:34:22,688 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 282 transitions. [2020-10-21 22:34:22,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-21 22:34:22,689 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:34:22,689 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:34:22,900 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-21 22:34:22,901 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:34:22,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:34:22,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1711561906, now seen corresponding path program 9 times [2020-10-21 22:34:22,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:34:22,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307333788] [2020-10-21 22:34:22,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:34:22,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:34:22,976 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:22,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307333788] [2020-10-21 22:34:22,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005313406] [2020-10-21 22:34:22,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:34:23,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-21 22:34:23,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:34:23,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-21 22:34:23,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:34:23,107 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:34:23,121 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:23,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:34:23,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-21 22:34:23,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537556894] [2020-10-21 22:34:23,122 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-21 22:34:23,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:34:23,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-21 22:34:23,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-10-21 22:34:23,123 INFO L87 Difference]: Start difference. First operand 113 states and 282 transitions. Second operand 13 states. [2020-10-21 22:34:23,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:34:23,373 INFO L93 Difference]: Finished difference Result 152 states and 363 transitions. [2020-10-21 22:34:23,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-21 22:34:23,373 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-21 22:34:23,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:34:23,375 INFO L225 Difference]: With dead ends: 152 [2020-10-21 22:34:23,375 INFO L226 Difference]: Without dead ends: 147 [2020-10-21 22:34:23,375 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-10-21 22:34:23,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-21 22:34:23,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 112. [2020-10-21 22:34:23,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-21 22:34:23,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 277 transitions. [2020-10-21 22:34:23,381 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 277 transitions. Word has length 12 [2020-10-21 22:34:23,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:34:23,381 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 277 transitions. [2020-10-21 22:34:23,381 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-21 22:34:23,381 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 277 transitions. [2020-10-21 22:34:23,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-21 22:34:23,382 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:34:23,382 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:34:23,593 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-21 22:34:23,594 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:34:23,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:34:23,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1711533076, now seen corresponding path program 10 times [2020-10-21 22:34:23,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:34:23,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320436596] [2020-10-21 22:34:23,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:34:23,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:34:23,670 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:23,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320436596] [2020-10-21 22:34:23,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355176889] [2020-10-21 22:34:23,671 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:34:23,715 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 22:34:23,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:34:23,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-21 22:34:23,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:34:23,816 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 22:34:24,935 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:24,935 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:34:24,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-10-21 22:34:24,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786967638] [2020-10-21 22:34:24,936 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-21 22:34:24,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:34:24,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-21 22:34:24,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=125, Unknown=1, NotChecked=0, Total=182 [2020-10-21 22:34:24,936 INFO L87 Difference]: Start difference. First operand 112 states and 277 transitions. Second operand 14 states. [2020-10-21 22:34:39,740 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2020-10-21 22:34:54,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:34:54,365 INFO L93 Difference]: Finished difference Result 168 states and 398 transitions. [2020-10-21 22:34:54,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-21 22:34:54,401 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2020-10-21 22:34:54,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:34:54,402 INFO L225 Difference]: With dead ends: 168 [2020-10-21 22:34:54,402 INFO L226 Difference]: Without dead ends: 163 [2020-10-21 22:34:54,402 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=195, Invalid=403, Unknown=2, NotChecked=0, Total=600 [2020-10-21 22:34:54,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-21 22:34:54,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 112. [2020-10-21 22:34:54,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-21 22:34:54,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 279 transitions. [2020-10-21 22:34:54,407 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 279 transitions. Word has length 12 [2020-10-21 22:34:54,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:34:54,407 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 279 transitions. [2020-10-21 22:34:54,407 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-21 22:34:54,408 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 279 transitions. [2020-10-21 22:34:54,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-21 22:34:54,408 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:34:54,408 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:34:54,618 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:34:54,619 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:34:54,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:34:54,619 INFO L82 PathProgramCache]: Analyzing trace with hash -1711532115, now seen corresponding path program 11 times [2020-10-21 22:34:54,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:34:54,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894229913] [2020-10-21 22:34:54,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:34:54,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:34:54,699 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:54,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894229913] [2020-10-21 22:34:54,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211229991] [2020-10-21 22:34:54,700 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:34:54,742 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 22:34:54,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:34:54,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-21 22:34:54,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:34:54,834 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:34:54,848 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:54,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:34:54,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-21 22:34:54,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794080141] [2020-10-21 22:34:54,849 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-21 22:34:54,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:34:54,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-21 22:34:54,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-10-21 22:34:54,850 INFO L87 Difference]: Start difference. First operand 112 states and 279 transitions. Second operand 13 states. [2020-10-21 22:34:55,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:34:55,100 INFO L93 Difference]: Finished difference Result 148 states and 355 transitions. [2020-10-21 22:34:55,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-21 22:34:55,101 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-21 22:34:55,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:34:55,102 INFO L225 Difference]: With dead ends: 148 [2020-10-21 22:34:55,102 INFO L226 Difference]: Without dead ends: 143 [2020-10-21 22:34:55,102 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-10-21 22:34:55,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-21 22:34:55,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 111. [2020-10-21 22:34:55,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-21 22:34:55,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 274 transitions. [2020-10-21 22:34:55,107 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 274 transitions. Word has length 12 [2020-10-21 22:34:55,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:34:55,107 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 274 transitions. [2020-10-21 22:34:55,107 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-21 22:34:55,107 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 274 transitions. [2020-10-21 22:34:55,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-21 22:34:55,108 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:34:55,108 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:34:55,318 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:34:55,319 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:34:55,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:34:55,320 INFO L82 PathProgramCache]: Analyzing trace with hash -1710639346, now seen corresponding path program 12 times [2020-10-21 22:34:55,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:34:55,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879173757] [2020-10-21 22:34:55,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:34:55,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:34:55,386 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:55,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879173757] [2020-10-21 22:34:55,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948742189] [2020-10-21 22:34:55,387 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:34:55,446 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-21 22:34:55,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:34:55,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-21 22:34:55,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:34:55,528 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 22:34:55,539 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:55,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:34:55,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-21 22:34:55,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527659059] [2020-10-21 22:34:55,540 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-21 22:34:55,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:34:55,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-21 22:34:55,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-21 22:34:55,541 INFO L87 Difference]: Start difference. First operand 111 states and 274 transitions. Second operand 13 states. [2020-10-21 22:34:55,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:34:55,903 INFO L93 Difference]: Finished difference Result 167 states and 399 transitions. [2020-10-21 22:34:55,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-21 22:34:55,904 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-21 22:34:55,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:34:55,905 INFO L225 Difference]: With dead ends: 167 [2020-10-21 22:34:55,906 INFO L226 Difference]: Without dead ends: 162 [2020-10-21 22:34:55,907 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-10-21 22:34:55,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-21 22:34:55,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 114. [2020-10-21 22:34:55,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-21 22:34:55,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 287 transitions. [2020-10-21 22:34:55,911 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 287 transitions. Word has length 12 [2020-10-21 22:34:55,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:34:55,912 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 287 transitions. [2020-10-21 22:34:55,912 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-21 22:34:55,912 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 287 transitions. [2020-10-21 22:34:55,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-21 22:34:55,913 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:34:55,913 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:34:56,117 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:34:56,118 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:34:56,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:34:56,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1710638385, now seen corresponding path program 13 times [2020-10-21 22:34:56,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:34:56,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88546835] [2020-10-21 22:34:56,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:34:56,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:34:56,204 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:56,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88546835] [2020-10-21 22:34:56,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338903158] [2020-10-21 22:34:56,204 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:34:56,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:34:56,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-21 22:34:56,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:34:56,349 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:34:56,357 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:56,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:34:56,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-21 22:34:56,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637271806] [2020-10-21 22:34:56,359 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-21 22:34:56,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:34:56,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-21 22:34:56,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-21 22:34:56,360 INFO L87 Difference]: Start difference. First operand 114 states and 287 transitions. Second operand 13 states. [2020-10-21 22:34:56,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:34:56,725 INFO L93 Difference]: Finished difference Result 177 states and 423 transitions. [2020-10-21 22:34:56,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-21 22:34:56,725 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-21 22:34:56,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:34:56,727 INFO L225 Difference]: With dead ends: 177 [2020-10-21 22:34:56,727 INFO L226 Difference]: Without dead ends: 169 [2020-10-21 22:34:56,728 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-10-21 22:34:56,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-21 22:34:56,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 114. [2020-10-21 22:34:56,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-21 22:34:56,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 283 transitions. [2020-10-21 22:34:56,732 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 283 transitions. Word has length 12 [2020-10-21 22:34:56,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:34:56,733 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 283 transitions. [2020-10-21 22:34:56,733 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-21 22:34:56,733 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 283 transitions. [2020-10-21 22:34:56,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-21 22:34:56,734 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:34:56,734 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:34:56,946 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-10-21 22:34:56,947 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:34:56,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:34:56,947 INFO L82 PathProgramCache]: Analyzing trace with hash -1710609555, now seen corresponding path program 14 times [2020-10-21 22:34:56,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:34:56,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725495680] [2020-10-21 22:34:56,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:34:56,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:34:57,052 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:57,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725495680] [2020-10-21 22:34:57,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578852560] [2020-10-21 22:34:57,053 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:34:57,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 22:34:57,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:34:57,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-21 22:34:57,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:34:57,221 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 22:34:57,256 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:57,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:34:57,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-21 22:34:57,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103646004] [2020-10-21 22:34:57,257 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-21 22:34:57,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:34:57,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-21 22:34:57,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-10-21 22:34:57,258 INFO L87 Difference]: Start difference. First operand 114 states and 283 transitions. Second operand 13 states. [2020-10-21 22:34:57,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:34:57,662 INFO L93 Difference]: Finished difference Result 165 states and 395 transitions. [2020-10-21 22:34:57,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-21 22:34:57,663 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-21 22:34:57,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:34:57,664 INFO L225 Difference]: With dead ends: 165 [2020-10-21 22:34:57,665 INFO L226 Difference]: Without dead ends: 160 [2020-10-21 22:34:57,665 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2020-10-21 22:34:57,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-21 22:34:57,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 112. [2020-10-21 22:34:57,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-21 22:34:57,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 275 transitions. [2020-10-21 22:34:57,670 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 275 transitions. Word has length 12 [2020-10-21 22:34:57,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:34:57,670 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 275 transitions. [2020-10-21 22:34:57,671 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-21 22:34:57,671 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 275 transitions. [2020-10-21 22:34:57,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-21 22:34:57,672 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:34:57,672 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:34:57,882 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-10-21 22:34:57,883 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:34:57,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:34:57,883 INFO L82 PathProgramCache]: Analyzing trace with hash -1682933716, now seen corresponding path program 15 times [2020-10-21 22:34:57,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:34:57,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013826248] [2020-10-21 22:34:57,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:34:57,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:34:57,994 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:57,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013826248] [2020-10-21 22:34:57,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836514663] [2020-10-21 22:34:57,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:34:58,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-21 22:34:58,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:34:58,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-21 22:34:58,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:34:58,186 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 22:34:58,220 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:58,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:34:58,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-21 22:34:58,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802234798] [2020-10-21 22:34:58,221 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-21 22:34:58,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:34:58,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-21 22:34:58,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-21 22:34:58,222 INFO L87 Difference]: Start difference. First operand 112 states and 275 transitions. Second operand 13 states. [2020-10-21 22:34:58,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:34:58,464 INFO L93 Difference]: Finished difference Result 158 states and 378 transitions. [2020-10-21 22:34:58,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-21 22:34:58,464 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-21 22:34:58,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:34:58,466 INFO L225 Difference]: With dead ends: 158 [2020-10-21 22:34:58,466 INFO L226 Difference]: Without dead ends: 153 [2020-10-21 22:34:58,466 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-10-21 22:34:58,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-21 22:34:58,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 116. [2020-10-21 22:34:58,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-21 22:34:58,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 291 transitions. [2020-10-21 22:34:58,471 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 291 transitions. Word has length 12 [2020-10-21 22:34:58,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:34:58,472 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 291 transitions. [2020-10-21 22:34:58,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-21 22:34:58,472 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 291 transitions. [2020-10-21 22:34:58,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-21 22:34:58,474 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:34:58,474 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:34:58,685 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-10-21 22:34:58,686 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:34:58,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:34:58,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1682932755, now seen corresponding path program 16 times [2020-10-21 22:34:58,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:34:58,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765992626] [2020-10-21 22:34:58,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:34:58,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:34:58,762 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:58,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765992626] [2020-10-21 22:34:58,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197837679] [2020-10-21 22:34:58,763 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:34:58,826 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 22:34:58,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:34:58,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-21 22:34:58,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:34:58,917 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:34:58,928 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:58,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:34:58,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-21 22:34:58,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79667580] [2020-10-21 22:34:58,930 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-21 22:34:58,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:34:58,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-21 22:34:58,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-10-21 22:34:58,931 INFO L87 Difference]: Start difference. First operand 116 states and 291 transitions. Second operand 13 states. [2020-10-21 22:34:59,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:34:59,310 INFO L93 Difference]: Finished difference Result 185 states and 436 transitions. [2020-10-21 22:34:59,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-21 22:34:59,311 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-21 22:34:59,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:34:59,312 INFO L225 Difference]: With dead ends: 185 [2020-10-21 22:34:59,313 INFO L226 Difference]: Without dead ends: 177 [2020-10-21 22:34:59,313 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2020-10-21 22:34:59,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-21 22:34:59,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 115. [2020-10-21 22:34:59,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-21 22:34:59,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 286 transitions. [2020-10-21 22:34:59,318 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 286 transitions. Word has length 12 [2020-10-21 22:34:59,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:34:59,318 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 286 transitions. [2020-10-21 22:34:59,319 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-21 22:34:59,319 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 286 transitions. [2020-10-21 22:34:59,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-21 22:34:59,319 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:34:59,320 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:34:59,533 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-10-21 22:34:59,534 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:34:59,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:34:59,534 INFO L82 PathProgramCache]: Analyzing trace with hash -1682903925, now seen corresponding path program 17 times [2020-10-21 22:34:59,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:34:59,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652069087] [2020-10-21 22:34:59,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:34:59,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:34:59,606 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:59,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652069087] [2020-10-21 22:34:59,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291682725] [2020-10-21 22:34:59,606 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:34:59,666 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 22:34:59,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:34:59,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-21 22:34:59,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:34:59,760 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 22:34:59,775 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:34:59,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:34:59,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-21 22:34:59,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468229849] [2020-10-21 22:34:59,776 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-21 22:34:59,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:34:59,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-21 22:34:59,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-21 22:34:59,777 INFO L87 Difference]: Start difference. First operand 115 states and 286 transitions. Second operand 13 states. [2020-10-21 22:35:00,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:35:00,208 INFO L93 Difference]: Finished difference Result 194 states and 459 transitions. [2020-10-21 22:35:00,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-21 22:35:00,209 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-21 22:35:00,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:35:00,211 INFO L225 Difference]: With dead ends: 194 [2020-10-21 22:35:00,211 INFO L226 Difference]: Without dead ends: 186 [2020-10-21 22:35:00,212 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-10-21 22:35:00,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-21 22:35:00,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 117. [2020-10-21 22:35:00,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-21 22:35:00,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 283 transitions. [2020-10-21 22:35:00,217 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 283 transitions. Word has length 12 [2020-10-21 22:35:00,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:35:00,217 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 283 transitions. [2020-10-21 22:35:00,217 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-21 22:35:00,218 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 283 transitions. [2020-10-21 22:35:00,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-21 22:35:00,218 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:35:00,218 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:35:00,432 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-10-21 22:35:00,433 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:35:00,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:35:00,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1682902964, now seen corresponding path program 18 times [2020-10-21 22:35:00,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:35:00,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558679755] [2020-10-21 22:35:00,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:35:00,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:35:00,497 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:35:00,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558679755] [2020-10-21 22:35:00,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17818329] [2020-10-21 22:35:00,498 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:35:00,544 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-21 22:35:00,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:35:00,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-21 22:35:00,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:35:00,660 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:35:00,672 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:35:00,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:35:00,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-21 22:35:00,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25713251] [2020-10-21 22:35:00,674 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-21 22:35:00,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:35:00,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-21 22:35:00,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-21 22:35:00,675 INFO L87 Difference]: Start difference. First operand 117 states and 283 transitions. Second operand 13 states. [2020-10-21 22:35:01,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:35:01,067 INFO L93 Difference]: Finished difference Result 172 states and 404 transitions. [2020-10-21 22:35:01,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-21 22:35:01,068 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-21 22:35:01,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:35:01,070 INFO L225 Difference]: With dead ends: 172 [2020-10-21 22:35:01,070 INFO L226 Difference]: Without dead ends: 167 [2020-10-21 22:35:01,071 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-10-21 22:35:01,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-21 22:35:01,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 114. [2020-10-21 22:35:01,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-21 22:35:01,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 268 transitions. [2020-10-21 22:35:01,077 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 268 transitions. Word has length 12 [2020-10-21 22:35:01,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:35:01,078 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 268 transitions. [2020-10-21 22:35:01,078 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-21 22:35:01,078 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 268 transitions. [2020-10-21 22:35:01,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-21 22:35:01,079 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:35:01,079 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:35:01,294 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:35:01,294 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:35:01,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:35:01,295 INFO L82 PathProgramCache]: Analyzing trace with hash -1396877225, now seen corresponding path program 5 times [2020-10-21 22:35:01,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:35:01,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697627308] [2020-10-21 22:35:01,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:35:01,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:35:01,396 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:35:01,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697627308] [2020-10-21 22:35:01,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68246488] [2020-10-21 22:35:01,397 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:35:01,454 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-21 22:35:01,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:35:01,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 22:35:01,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:35:01,571 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:35:01,598 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:35:01,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:35:01,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-10-21 22:35:01,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378143260] [2020-10-21 22:35:01,599 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-21 22:35:01,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:35:01,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-21 22:35:01,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2020-10-21 22:35:01,600 INFO L87 Difference]: Start difference. First operand 114 states and 268 transitions. Second operand 16 states. [2020-10-21 22:35:01,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:35:01,760 INFO L93 Difference]: Finished difference Result 164 states and 382 transitions. [2020-10-21 22:35:01,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-21 22:35:01,761 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 12 [2020-10-21 22:35:01,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:35:01,762 INFO L225 Difference]: With dead ends: 164 [2020-10-21 22:35:01,762 INFO L226 Difference]: Without dead ends: 159 [2020-10-21 22:35:01,762 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=147, Invalid=315, Unknown=0, NotChecked=0, Total=462 [2020-10-21 22:35:01,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-21 22:35:01,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2020-10-21 22:35:01,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-21 22:35:01,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 299 transitions. [2020-10-21 22:35:01,767 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 299 transitions. Word has length 12 [2020-10-21 22:35:01,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:35:01,767 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 299 transitions. [2020-10-21 22:35:01,767 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-21 22:35:01,767 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 299 transitions. [2020-10-21 22:35:01,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-21 22:35:01,768 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:35:01,768 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:35:01,979 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-10-21 22:35:01,979 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:35:01,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:35:01,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1150962717, now seen corresponding path program 5 times [2020-10-21 22:35:01,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:35:01,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644616679] [2020-10-21 22:35:01,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:35:01,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:35:02,061 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:35:02,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644616679] [2020-10-21 22:35:02,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945220169] [2020-10-21 22:35:02,062 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:35:02,135 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-21 22:35:02,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:35:02,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 22:35:02,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:35:02,258 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 22:35:02,270 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:35:02,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:35:02,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-21 22:35:02,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918041763] [2020-10-21 22:35:02,272 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-21 22:35:02,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:35:02,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-21 22:35:02,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-21 22:35:02,272 INFO L87 Difference]: Start difference. First operand 122 states and 299 transitions. Second operand 15 states. [2020-10-21 22:35:02,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:35:02,483 INFO L93 Difference]: Finished difference Result 173 states and 412 transitions. [2020-10-21 22:35:02,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-21 22:35:02,484 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-21 22:35:02,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:35:02,485 INFO L225 Difference]: With dead ends: 173 [2020-10-21 22:35:02,485 INFO L226 Difference]: Without dead ends: 167 [2020-10-21 22:35:02,485 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2020-10-21 22:35:02,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-21 22:35:02,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 132. [2020-10-21 22:35:02,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-21 22:35:02,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 332 transitions. [2020-10-21 22:35:02,493 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 332 transitions. Word has length 12 [2020-10-21 22:35:02,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:35:02,493 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 332 transitions. [2020-10-21 22:35:02,493 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-21 22:35:02,494 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 332 transitions. [2020-10-21 22:35:02,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 22:35:02,497 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:35:02,497 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:35:02,709 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-10-21 22:35:02,710 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:35:02,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:35:02,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1518812168, now seen corresponding path program 19 times [2020-10-21 22:35:02,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:35:02,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434987432] [2020-10-21 22:35:02,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:35:02,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:35:02,785 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:35:02,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434987432] [2020-10-21 22:35:02,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141048570] [2020-10-21 22:35:02,786 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:35:02,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:35:02,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 22:35:02,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:35:02,950 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:35:02,961 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:35:02,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:35:02,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-21 22:35:02,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89743505] [2020-10-21 22:35:02,962 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-21 22:35:02,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:35:02,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-21 22:35:02,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-21 22:35:02,964 INFO L87 Difference]: Start difference. First operand 132 states and 332 transitions. Second operand 15 states. [2020-10-21 22:35:03,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:35:03,296 INFO L93 Difference]: Finished difference Result 183 states and 437 transitions. [2020-10-21 22:35:03,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-21 22:35:03,296 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-21 22:35:03,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:35:03,298 INFO L225 Difference]: With dead ends: 183 [2020-10-21 22:35:03,298 INFO L226 Difference]: Without dead ends: 178 [2020-10-21 22:35:03,299 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2020-10-21 22:35:03,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-10-21 22:35:03,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 131. [2020-10-21 22:35:03,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-21 22:35:03,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 327 transitions. [2020-10-21 22:35:03,303 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 327 transitions. Word has length 13 [2020-10-21 22:35:03,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:35:03,303 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 327 transitions. [2020-10-21 22:35:03,303 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-21 22:35:03,303 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 327 transitions. [2020-10-21 22:35:03,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 22:35:03,304 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:35:03,304 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:35:03,515 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:35:03,516 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:35:03,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:35:03,516 INFO L82 PathProgramCache]: Analyzing trace with hash -1518783338, now seen corresponding path program 20 times [2020-10-21 22:35:03,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:35:03,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639342447] [2020-10-21 22:35:03,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:35:03,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:35:03,583 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:35:03,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639342447] [2020-10-21 22:35:03,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25522993] [2020-10-21 22:35:03,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:35:03,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 22:35:03,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:35:03,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 22:35:03,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:35:03,745 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 22:35:06,829 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 20 [2020-10-21 22:35:06,831 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:35:06,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:35:06,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-10-21 22:35:06,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619655494] [2020-10-21 22:35:06,831 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-21 22:35:06,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:35:06,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-21 22:35:06,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=166, Unknown=1, NotChecked=0, Total=240 [2020-10-21 22:35:06,832 INFO L87 Difference]: Start difference. First operand 131 states and 327 transitions. Second operand 16 states. [2020-10-21 22:35:11,037 WARN L193 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-10-21 22:35:13,276 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 31 [2020-10-21 22:35:23,653 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification. DAG size of input: 36 DAG size of output: 20 [2020-10-21 22:35:34,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:35:34,843 INFO L93 Difference]: Finished difference Result 212 states and 502 transitions. [2020-10-21 22:35:34,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-21 22:35:34,875 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-10-21 22:35:34,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:35:34,876 INFO L225 Difference]: With dead ends: 212 [2020-10-21 22:35:34,876 INFO L226 Difference]: Without dead ends: 207 [2020-10-21 22:35:34,877 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 16.8s TimeCoverageRelationStatistics Valid=273, Invalid=593, Unknown=4, NotChecked=0, Total=870 [2020-10-21 22:35:34,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-21 22:35:34,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 131. [2020-10-21 22:35:34,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-21 22:35:34,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 329 transitions. [2020-10-21 22:35:34,881 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 329 transitions. Word has length 13 [2020-10-21 22:35:34,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:35:34,882 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 329 transitions. [2020-10-21 22:35:34,882 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-21 22:35:34,882 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 329 transitions. [2020-10-21 22:35:34,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 22:35:34,884 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:35:34,884 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:35:35,095 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:35:35,096 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:35:35,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:35:35,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1518782377, now seen corresponding path program 21 times [2020-10-21 22:35:35,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:35:35,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103200868] [2020-10-21 22:35:35,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:35:35,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:35:35,192 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:35:35,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103200868] [2020-10-21 22:35:35,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373828562] [2020-10-21 22:35:35,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:35:35,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-21 22:35:35,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:35:35,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 22:35:35,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:35:35,340 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:35:35,350 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:35:35,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:35:35,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-21 22:35:35,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198063366] [2020-10-21 22:35:35,351 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-21 22:35:35,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:35:35,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-21 22:35:35,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-21 22:35:35,352 INFO L87 Difference]: Start difference. First operand 131 states and 329 transitions. Second operand 15 states. [2020-10-21 22:35:35,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:35:35,692 INFO L93 Difference]: Finished difference Result 184 states and 441 transitions. [2020-10-21 22:35:35,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-21 22:35:35,693 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-21 22:35:35,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:35:35,694 INFO L225 Difference]: With dead ends: 184 [2020-10-21 22:35:35,694 INFO L226 Difference]: Without dead ends: 179 [2020-10-21 22:35:35,695 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2020-10-21 22:35:35,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-10-21 22:35:35,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 129. [2020-10-21 22:35:35,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-21 22:35:35,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 319 transitions. [2020-10-21 22:35:35,699 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 319 transitions. Word has length 13 [2020-10-21 22:35:35,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:35:35,700 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 319 transitions. [2020-10-21 22:35:35,700 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-21 22:35:35,700 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 319 transitions. [2020-10-21 22:35:35,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 22:35:35,700 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:35:35,700 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:35:35,901 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-10-21 22:35:35,901 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:35:35,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:35:35,902 INFO L82 PathProgramCache]: Analyzing trace with hash -1517889608, now seen corresponding path program 22 times [2020-10-21 22:35:35,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:35:35,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843753785] [2020-10-21 22:35:35,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:35:35,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:35:35,982 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:35:35,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843753785] [2020-10-21 22:35:35,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736020233] [2020-10-21 22:35:35,983 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:35:36,035 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 22:35:36,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:35:36,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 22:35:36,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:35:36,170 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 22:35:36,200 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:35:36,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:35:36,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-21 22:35:36,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472946086] [2020-10-21 22:35:36,202 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-21 22:35:36,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:35:36,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-21 22:35:36,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-21 22:35:36,203 INFO L87 Difference]: Start difference. First operand 129 states and 319 transitions. Second operand 15 states. [2020-10-21 22:35:36,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:35:36,759 INFO L93 Difference]: Finished difference Result 207 states and 492 transitions. [2020-10-21 22:35:36,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-21 22:35:36,760 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-21 22:35:36,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:35:36,761 INFO L225 Difference]: With dead ends: 207 [2020-10-21 22:35:36,761 INFO L226 Difference]: Without dead ends: 202 [2020-10-21 22:35:36,762 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=289, Invalid=581, Unknown=0, NotChecked=0, Total=870 [2020-10-21 22:35:36,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-10-21 22:35:36,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 132. [2020-10-21 22:35:36,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-21 22:35:36,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 332 transitions. [2020-10-21 22:35:36,767 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 332 transitions. Word has length 13 [2020-10-21 22:35:36,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:35:36,768 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 332 transitions. [2020-10-21 22:35:36,768 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-21 22:35:36,768 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 332 transitions. [2020-10-21 22:35:36,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 22:35:36,769 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:35:36,769 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:35:36,980 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:35:36,980 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:35:36,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:35:36,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1517888647, now seen corresponding path program 23 times [2020-10-21 22:35:36,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:35:36,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338575031] [2020-10-21 22:35:36,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:35:36,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:35:37,070 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:35:37,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338575031] [2020-10-21 22:35:37,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432790942] [2020-10-21 22:35:37,071 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:35:37,128 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 22:35:37,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:35:37,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 22:35:37,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:35:41,358 WARN L193 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 25 [2020-10-21 22:35:41,366 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:35:47,545 WARN L193 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 43 DAG size of output: 20 [2020-10-21 22:35:47,547 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:35:47,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:35:47,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-10-21 22:35:47,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930342223] [2020-10-21 22:35:47,548 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-21 22:35:47,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:35:47,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-21 22:35:47,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=168, Unknown=2, NotChecked=0, Total=240 [2020-10-21 22:35:47,548 INFO L87 Difference]: Start difference. First operand 132 states and 332 transitions. Second operand 16 states. [2020-10-21 22:35:51,673 WARN L193 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2020-10-21 22:36:10,859 WARN L193 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2020-10-21 22:36:19,147 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification. DAG size of input: 40 DAG size of output: 28 [2020-10-21 22:36:49,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:36:49,852 INFO L93 Difference]: Finished difference Result 225 states and 541 transitions. [2020-10-21 22:36:49,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-21 22:36:49,886 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-10-21 22:36:49,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:36:49,887 INFO L225 Difference]: With dead ends: 225 [2020-10-21 22:36:49,887 INFO L226 Difference]: Without dead ends: 216 [2020-10-21 22:36:49,887 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 43.7s TimeCoverageRelationStatistics Valid=315, Invalid=731, Unknown=10, NotChecked=0, Total=1056 [2020-10-21 22:36:49,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-21 22:36:49,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 131. [2020-10-21 22:36:49,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-21 22:36:49,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 327 transitions. [2020-10-21 22:36:49,892 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 327 transitions. Word has length 13 [2020-10-21 22:36:49,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:36:49,892 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 327 transitions. [2020-10-21 22:36:49,892 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-21 22:36:49,892 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 327 transitions. [2020-10-21 22:36:49,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 22:36:49,893 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:36:49,893 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:36:50,104 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-10-21 22:36:50,105 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:36:50,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:36:50,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1517859817, now seen corresponding path program 24 times [2020-10-21 22:36:50,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:36:50,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650227054] [2020-10-21 22:36:50,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:36:50,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:36:50,197 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:36:50,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650227054] [2020-10-21 22:36:50,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857144030] [2020-10-21 22:36:50,198 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:36:50,245 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-21 22:36:50,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:36:50,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 22:36:50,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:36:50,407 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:36:50,409 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 22:36:56,541 WARN L193 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 61 DAG size of output: 33 [2020-10-21 22:36:56,543 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:36:56,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:36:56,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-10-21 22:36:56,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148457650] [2020-10-21 22:36:56,544 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-21 22:36:56,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:36:56,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-21 22:36:56,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=169, Unknown=1, NotChecked=0, Total=240 [2020-10-21 22:36:56,545 INFO L87 Difference]: Start difference. First operand 131 states and 327 transitions. Second operand 16 states. [2020-10-21 22:37:04,971 WARN L193 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 40 [2020-10-21 22:37:07,169 WARN L193 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 50 [2020-10-21 22:37:17,396 WARN L193 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2020-10-21 22:37:57,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:37:57,798 INFO L93 Difference]: Finished difference Result 222 states and 531 transitions. [2020-10-21 22:37:57,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-21 22:37:57,799 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-10-21 22:37:57,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:37:57,801 INFO L225 Difference]: With dead ends: 222 [2020-10-21 22:37:57,801 INFO L226 Difference]: Without dead ends: 219 [2020-10-21 22:37:57,802 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 27.0s TimeCoverageRelationStatistics Valid=298, Invalid=687, Unknown=7, NotChecked=0, Total=992 [2020-10-21 22:37:57,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-10-21 22:37:57,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 139. [2020-10-21 22:37:57,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-21 22:37:57,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 353 transitions. [2020-10-21 22:37:57,809 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 353 transitions. Word has length 13 [2020-10-21 22:37:57,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:37:57,809 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 353 transitions. [2020-10-21 22:37:57,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-21 22:37:57,809 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 353 transitions. [2020-10-21 22:37:57,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 22:37:57,810 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:37:57,810 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:37:58,019 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:37:58,020 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:37:58,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:37:58,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1490183978, now seen corresponding path program 25 times [2020-10-21 22:37:58,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:37:58,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34610245] [2020-10-21 22:37:58,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:37:58,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:37:58,129 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:37:58,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34610245] [2020-10-21 22:37:58,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222487472] [2020-10-21 22:37:58,130 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:37:58,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:37:58,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 22:37:58,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:37:58,297 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 22:37:58,314 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:37:58,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:37:58,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-21 22:37:58,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884060947] [2020-10-21 22:37:58,315 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-21 22:37:58,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:37:58,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-21 22:37:58,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-21 22:37:58,316 INFO L87 Difference]: Start difference. First operand 139 states and 353 transitions. Second operand 15 states. [2020-10-21 22:37:58,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:37:58,880 INFO L93 Difference]: Finished difference Result 214 states and 520 transitions. [2020-10-21 22:37:58,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-21 22:37:58,881 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-21 22:37:58,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:37:58,882 INFO L225 Difference]: With dead ends: 214 [2020-10-21 22:37:58,882 INFO L226 Difference]: Without dead ends: 209 [2020-10-21 22:37:58,883 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=323, Invalid=669, Unknown=0, NotChecked=0, Total=992 [2020-10-21 22:37:58,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-10-21 22:37:58,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 144. [2020-10-21 22:37:58,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-21 22:37:58,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 374 transitions. [2020-10-21 22:37:58,887 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 374 transitions. Word has length 13 [2020-10-21 22:37:58,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:37:58,888 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 374 transitions. [2020-10-21 22:37:58,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-21 22:37:58,888 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 374 transitions. [2020-10-21 22:37:58,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 22:37:58,889 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:37:58,889 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:37:59,100 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-10-21 22:37:59,101 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:37:59,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:37:59,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1490183017, now seen corresponding path program 26 times [2020-10-21 22:37:59,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:37:59,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901356189] [2020-10-21 22:37:59,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:37:59,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:37:59,190 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:37:59,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901356189] [2020-10-21 22:37:59,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453535109] [2020-10-21 22:37:59,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:37:59,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 22:37:59,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:37:59,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 22:37:59,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:37:59,365 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:37:59,380 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:37:59,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:37:59,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-21 22:37:59,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267470705] [2020-10-21 22:37:59,381 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-21 22:37:59,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:37:59,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-21 22:37:59,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-21 22:37:59,382 INFO L87 Difference]: Start difference. First operand 144 states and 374 transitions. Second operand 15 states. [2020-10-21 22:37:59,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:37:59,993 INFO L93 Difference]: Finished difference Result 212 states and 518 transitions. [2020-10-21 22:37:59,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-21 22:37:59,994 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-21 22:37:59,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:37:59,996 INFO L225 Difference]: With dead ends: 212 [2020-10-21 22:37:59,996 INFO L226 Difference]: Without dead ends: 207 [2020-10-21 22:37:59,997 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=325, Invalid=731, Unknown=0, NotChecked=0, Total=1056 [2020-10-21 22:37:59,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-21 22:38:00,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 143. [2020-10-21 22:38:00,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-21 22:38:00,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 369 transitions. [2020-10-21 22:38:00,002 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 369 transitions. Word has length 13 [2020-10-21 22:38:00,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:38:00,003 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 369 transitions. [2020-10-21 22:38:00,003 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-21 22:38:00,003 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 369 transitions. [2020-10-21 22:38:00,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 22:38:00,003 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:38:00,004 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:38:00,213 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-10-21 22:38:00,214 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:38:00,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:38:00,214 INFO L82 PathProgramCache]: Analyzing trace with hash -1490154187, now seen corresponding path program 27 times [2020-10-21 22:38:00,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:38:00,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091859701] [2020-10-21 22:38:00,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:38:00,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:38:00,302 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:38:00,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091859701] [2020-10-21 22:38:00,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601425841] [2020-10-21 22:38:00,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:38:00,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-21 22:38:00,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:38:00,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 22:38:00,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:38:00,496 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 22:38:00,507 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:38:00,507 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:38:00,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-21 22:38:00,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202512468] [2020-10-21 22:38:00,508 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-21 22:38:00,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:38:00,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-21 22:38:00,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-10-21 22:38:00,509 INFO L87 Difference]: Start difference. First operand 143 states and 369 transitions. Second operand 15 states. [2020-10-21 22:38:01,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:38:01,165 INFO L93 Difference]: Finished difference Result 232 states and 568 transitions. [2020-10-21 22:38:01,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-21 22:38:01,166 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-21 22:38:01,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:38:01,168 INFO L225 Difference]: With dead ends: 232 [2020-10-21 22:38:01,168 INFO L226 Difference]: Without dead ends: 221 [2020-10-21 22:38:01,169 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=349, Invalid=773, Unknown=0, NotChecked=0, Total=1122 [2020-10-21 22:38:01,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-10-21 22:38:01,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 132. [2020-10-21 22:38:01,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-21 22:38:01,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 336 transitions. [2020-10-21 22:38:01,173 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 336 transitions. Word has length 13 [2020-10-21 22:38:01,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:38:01,173 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 336 transitions. [2020-10-21 22:38:01,173 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-21 22:38:01,174 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 336 transitions. [2020-10-21 22:38:01,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 22:38:01,174 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:38:01,174 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:38:01,375 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-10-21 22:38:01,375 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:38:01,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:38:01,376 INFO L82 PathProgramCache]: Analyzing trace with hash -1490153226, now seen corresponding path program 28 times [2020-10-21 22:38:01,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:38:01,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824788798] [2020-10-21 22:38:01,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:38:01,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:38:01,468 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:38:01,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824788798] [2020-10-21 22:38:01,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65486048] [2020-10-21 22:38:01,469 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:38:01,511 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 22:38:01,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:38:01,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 22:38:01,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:38:01,624 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:38:01,635 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:38:01,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:38:01,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-21 22:38:01,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715379491] [2020-10-21 22:38:01,636 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-21 22:38:01,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:38:01,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-21 22:38:01,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-21 22:38:01,637 INFO L87 Difference]: Start difference. First operand 132 states and 336 transitions. Second operand 15 states. [2020-10-21 22:38:02,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:38:02,360 INFO L93 Difference]: Finished difference Result 211 states and 510 transitions. [2020-10-21 22:38:02,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-21 22:38:02,361 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-21 22:38:02,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:38:02,363 INFO L225 Difference]: With dead ends: 211 [2020-10-21 22:38:02,363 INFO L226 Difference]: Without dead ends: 203 [2020-10-21 22:38:02,364 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=343, Invalid=779, Unknown=0, NotChecked=0, Total=1122 [2020-10-21 22:38:02,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-10-21 22:38:02,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 132. [2020-10-21 22:38:02,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-21 22:38:02,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 332 transitions. [2020-10-21 22:38:02,371 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 332 transitions. Word has length 13 [2020-10-21 22:38:02,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:38:02,371 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 332 transitions. [2020-10-21 22:38:02,371 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-21 22:38:02,372 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 332 transitions. [2020-10-21 22:38:02,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 22:38:02,372 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:38:02,373 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:38:02,586 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-10-21 22:38:02,586 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:38:02,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:38:02,587 INFO L82 PathProgramCache]: Analyzing trace with hash -1489259496, now seen corresponding path program 29 times [2020-10-21 22:38:02,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:38:02,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041606871] [2020-10-21 22:38:02,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:38:02,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:38:02,682 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:38:02,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041606871] [2020-10-21 22:38:02,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458322560] [2020-10-21 22:38:02,683 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:38:02,736 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-21 22:38:02,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:38:02,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 22:38:02,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:38:02,890 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:38:02,932 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:38:02,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:38:02,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-21 22:38:02,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852181284] [2020-10-21 22:38:02,934 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-21 22:38:02,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:38:02,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-21 22:38:02,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-21 22:38:02,934 INFO L87 Difference]: Start difference. First operand 132 states and 332 transitions. Second operand 15 states. [2020-10-21 22:38:03,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:38:03,824 INFO L93 Difference]: Finished difference Result 210 states and 502 transitions. [2020-10-21 22:38:03,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-21 22:38:03,824 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-21 22:38:03,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:38:03,826 INFO L225 Difference]: With dead ends: 210 [2020-10-21 22:38:03,826 INFO L226 Difference]: Without dead ends: 205 [2020-10-21 22:38:03,826 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=345, Invalid=777, Unknown=0, NotChecked=0, Total=1122 [2020-10-21 22:38:03,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-10-21 22:38:03,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 129. [2020-10-21 22:38:03,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-21 22:38:03,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 317 transitions. [2020-10-21 22:38:03,830 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 317 transitions. Word has length 13 [2020-10-21 22:38:03,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:38:03,830 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 317 transitions. [2020-10-21 22:38:03,830 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-21 22:38:03,830 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 317 transitions. [2020-10-21 22:38:03,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 22:38:03,831 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:38:03,831 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:38:04,031 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-10-21 22:38:04,032 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:38:04,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:38:04,033 INFO L82 PathProgramCache]: Analyzing trace with hash -631309448, now seen corresponding path program 30 times [2020-10-21 22:38:04,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:38:04,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500410400] [2020-10-21 22:38:04,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:38:04,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:38:04,124 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:38:04,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500410400] [2020-10-21 22:38:04,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239574198] [2020-10-21 22:38:04,124 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:38:04,174 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-21 22:38:04,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:38:04,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 22:38:04,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:38:04,297 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 22:38:04,314 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:38:04,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:38:04,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-21 22:38:04,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10409684] [2020-10-21 22:38:04,315 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-21 22:38:04,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:38:04,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-21 22:38:04,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-10-21 22:38:04,315 INFO L87 Difference]: Start difference. First operand 129 states and 317 transitions. Second operand 15 states. [2020-10-21 22:38:04,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:38:04,677 INFO L93 Difference]: Finished difference Result 189 states and 452 transitions. [2020-10-21 22:38:04,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-21 22:38:04,678 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-21 22:38:04,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:38:04,679 INFO L225 Difference]: With dead ends: 189 [2020-10-21 22:38:04,679 INFO L226 Difference]: Without dead ends: 184 [2020-10-21 22:38:04,680 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=196, Invalid=404, Unknown=0, NotChecked=0, Total=600 [2020-10-21 22:38:04,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-10-21 22:38:04,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 135. [2020-10-21 22:38:04,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-21 22:38:04,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 341 transitions. [2020-10-21 22:38:04,684 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 341 transitions. Word has length 13 [2020-10-21 22:38:04,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:38:04,684 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 341 transitions. [2020-10-21 22:38:04,684 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-21 22:38:04,684 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 341 transitions. [2020-10-21 22:38:04,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 22:38:04,685 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:38:04,685 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:38:04,895 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-10-21 22:38:04,896 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:38:04,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:38:04,896 INFO L82 PathProgramCache]: Analyzing trace with hash -631308487, now seen corresponding path program 31 times [2020-10-21 22:38:04,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:38:04,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437423817] [2020-10-21 22:38:04,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:38:04,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:38:04,996 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:38:04,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437423817] [2020-10-21 22:38:04,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714066138] [2020-10-21 22:38:04,997 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:38:05,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:38:05,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 22:38:05,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:38:05,195 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 22:38:05,214 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:38:05,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:38:05,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-21 22:38:05,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656887156] [2020-10-21 22:38:05,215 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-21 22:38:05,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:38:05,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-21 22:38:05,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-21 22:38:05,216 INFO L87 Difference]: Start difference. First operand 135 states and 341 transitions. Second operand 15 states. [2020-10-21 22:38:05,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 22:38:05,838 INFO L93 Difference]: Finished difference Result 218 states and 521 transitions. [2020-10-21 22:38:05,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-21 22:38:05,839 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-21 22:38:05,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 22:38:05,841 INFO L225 Difference]: With dead ends: 218 [2020-10-21 22:38:05,841 INFO L226 Difference]: Without dead ends: 213 [2020-10-21 22:38:05,841 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=280, Invalid=650, Unknown=0, NotChecked=0, Total=930 [2020-10-21 22:38:05,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-10-21 22:38:05,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 134. [2020-10-21 22:38:05,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-21 22:38:05,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 336 transitions. [2020-10-21 22:38:05,845 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 336 transitions. Word has length 13 [2020-10-21 22:38:05,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 22:38:05,845 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 336 transitions. [2020-10-21 22:38:05,845 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-21 22:38:05,845 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 336 transitions. [2020-10-21 22:38:05,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 22:38:05,845 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 22:38:05,846 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 22:38:06,046 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-10-21 22:38:06,047 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 22:38:06,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 22:38:06,047 INFO L82 PathProgramCache]: Analyzing trace with hash -631279657, now seen corresponding path program 32 times [2020-10-21 22:38:06,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 22:38:06,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842963401] [2020-10-21 22:38:06,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 22:38:06,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 22:38:06,145 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:38:06,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842963401] [2020-10-21 22:38:06,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168289363] [2020-10-21 22:38:06,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:38:06,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 22:38:06,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 22:38:06,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 22:38:06,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 22:38:06,334 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 22:38:08,016 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 22:38:08,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 22:38:08,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-10-21 22:38:08,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569247930] [2020-10-21 22:38:08,017 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-21 22:38:08,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 22:38:08,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-21 22:38:08,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=171, Unknown=1, NotChecked=0, Total=240 [2020-10-21 22:38:08,018 INFO L87 Difference]: Start difference. First operand 134 states and 336 transitions. Second operand 16 states. [2020-10-21 22:38:10,525 WARN L193 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 26 Received shutdown request... [2020-10-21 22:38:55,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-21 22:38:55,788 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 22:38:55,788 WARN L546 AbstractCegarLoop]: Verification canceled [2020-10-21 22:38:55,796 WARN L235 ceAbstractionStarter]: Timeout [2020-10-21 22:38:55,796 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.10 10:38:55 BasicIcfg [2020-10-21 22:38:55,796 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-21 22:38:55,799 INFO L168 Benchmark]: Toolchain (without parser) took 284688.70 ms. Allocated memory was 138.9 MB in the beginning and 341.3 MB in the end (delta: 202.4 MB). Free memory was 101.1 MB in the beginning and 81.4 MB in the end (delta: 19.7 MB). Peak memory consumption was 222.1 MB. Max. memory is 7.1 GB. [2020-10-21 22:38:55,799 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.3 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-10-21 22:38:55,800 INFO L168 Benchmark]: CACSL2BoogieTranslator took 646.82 ms. Allocated memory was 138.9 MB in the beginning and 202.4 MB in the end (delta: 63.4 MB). Free memory was 100.2 MB in the beginning and 158.0 MB in the end (delta: -57.8 MB). Peak memory consumption was 22.5 MB. Max. memory is 7.1 GB. [2020-10-21 22:38:55,800 INFO L168 Benchmark]: Boogie Procedure Inliner took 49.43 ms. Allocated memory is still 202.4 MB. Free memory was 158.0 MB in the beginning and 155.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. [2020-10-21 22:38:55,800 INFO L168 Benchmark]: Boogie Preprocessor took 30.51 ms. Allocated memory is still 202.4 MB. Free memory was 155.9 MB in the beginning and 154.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-10-21 22:38:55,801 INFO L168 Benchmark]: RCFGBuilder took 472.23 ms. Allocated memory is still 202.4 MB. Free memory was 154.6 MB in the beginning and 132.2 MB in the end (delta: 22.4 MB). Peak memory consumption was 22.4 MB. Max. memory is 7.1 GB. [2020-10-21 22:38:55,801 INFO L168 Benchmark]: TraceAbstraction took 283479.75 ms. Allocated memory was 202.4 MB in the beginning and 341.3 MB in the end (delta: 138.9 MB). Free memory was 131.5 MB in the beginning and 81.4 MB in the end (delta: 50.1 MB). Peak memory consumption was 189.0 MB. Max. memory is 7.1 GB. [2020-10-21 22:38:55,804 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.3 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 646.82 ms. Allocated memory was 138.9 MB in the beginning and 202.4 MB in the end (delta: 63.4 MB). Free memory was 100.2 MB in the beginning and 158.0 MB in the end (delta: -57.8 MB). Peak memory consumption was 22.5 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 49.43 ms. Allocated memory is still 202.4 MB. Free memory was 158.0 MB in the beginning and 155.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 30.51 ms. Allocated memory is still 202.4 MB. Free memory was 155.9 MB in the beginning and 154.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 472.23 ms. Allocated memory is still 202.4 MB. Free memory was 154.6 MB in the beginning and 132.2 MB in the end (delta: 22.4 MB). Peak memory consumption was 22.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 283479.75 ms. Allocated memory was 202.4 MB in the beginning and 341.3 MB in the end (delta: 138.9 MB). Free memory was 131.5 MB in the beginning and 81.4 MB in the end (delta: 50.1 MB). Peak memory consumption was 189.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 710 VarBasedMoverChecksPositive, 10 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 19 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 1.8s, 67 PlacesBefore, 20 PlacesAfterwards, 66 TransitionsBefore, 16 TransitionsAfterwards, 1272 CoEnabledTransitionPairs, 6 FixpointIterations, 16 TrivialSequentialCompositions, 33 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 13 ConcurrentYvCompositions, 3 ChoiceCompositions, 65 TotalNumberOfCompositions, 1183 MoverChecksTotal - TimeoutResultAtElement [Line: 12]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 12). Cancelled while BasicCegarLoop was constructing difference of abstraction (134states) and FLOYD_HOARE automaton (currently 27 states, 16 states before enhancement),while ReachableStatesComputation was computing reachable states (141 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 61 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 283.3s, OverallIterations: 43, TraceHistogramMax: 5, AutomataDifference: 240.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.8s, HoareTripleCheckerStatistics: 558 SDtfs, 4598 SDslu, 3568 SDs, 0 SdLazy, 2621 SolverSat, 797 SolverUnsat, 64 SolverUnknown, 0 SolverNotchecked, 124.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1089 GetRequests, 182 SyntacticMatches, 35 SemanticMatches, 872 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4629 ImplicationChecksByTransitivity, 141.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=144occurred in iteration=36, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 42 MinimizatonAttempts, 1855 StatesRemovedByMinimization, 42 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 29.9s InterpolantComputationTime, 946 NumberOfCodeBlocks, 946 NumberOfCodeBlocksAsserted, 120 NumberOfCheckSat, 865 ConstructedInterpolants, 7 QuantifiedInterpolants, 79485 SizeOfPredicates, 38 NumberOfNonLiveVariables, 3696 ConjunctsInSsa, 346 ConjunctsInUnsatCore, 81 InterpolantComputations, 5 PerfectInterpolantSequences, 0/274 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