/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/triangular-longer-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-bf4350c [2020-09-17 02:33:15,767 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-17 02:33:15,772 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-17 02:33:15,807 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-17 02:33:15,807 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-17 02:33:15,809 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-17 02:33:15,810 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-17 02:33:15,812 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-17 02:33:15,815 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-17 02:33:15,816 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-17 02:33:15,817 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-17 02:33:15,819 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-17 02:33:15,819 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-17 02:33:15,820 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-17 02:33:15,821 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-17 02:33:15,823 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-17 02:33:15,824 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-17 02:33:15,826 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-17 02:33:15,828 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-17 02:33:15,830 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-17 02:33:15,832 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-17 02:33:15,834 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-17 02:33:15,835 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-17 02:33:15,836 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-17 02:33:15,839 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-17 02:33:15,850 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-17 02:33:15,851 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-17 02:33:15,852 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-17 02:33:15,853 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 [2020-09-17 02:33:15,882 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-17 02:33:15,883 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-17 02:33:15,885 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-17 02:33:15,885 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-17 02:33:15,885 INFO L138 SettingsManager]: * Use SBE=true [2020-09-17 02:33:15,886 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-17 02:33:15,886 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-17 02:33:15,886 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-17 02:33:15,886 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-17 02:33:15,886 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-17 02:33:15,887 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-17 02:33:15,887 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-17 02:33:15,887 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-17 02:33:15,887 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-17 02:33:15,887 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-17 02:33:15,888 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-17 02:33:15,888 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-17 02:33:15,888 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-17 02:33:15,888 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-17 02:33:15,888 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-17 02:33:15,889 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-17 02:33:15,889 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-17 02:33:15,889 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-17 02:33:15,889 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2020-09-17 02:33:15,889 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-17 02:33:15,890 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-17 02:33:15,890 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-17 02:33:15,890 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-09-17 02:33:15,890 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-17 02:33:16,388 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-17 02:33:16,417 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-17 02:33:16,422 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-17 02:33:16,424 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-17 02:33:16,427 INFO L275 PluginConnector]: CDTParser initialized [2020-09-17 02:33:16,428 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longer-2.i [2020-09-17 02:33:16,513 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4de0dcb53/0234eaeb74424c85ad5016bcf65c9b13/FLAG763034ddd [2020-09-17 02:33:17,231 INFO L306 CDTParser]: Found 1 translation units. [2020-09-17 02:33:17,232 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longer-2.i [2020-09-17 02:33:17,249 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4de0dcb53/0234eaeb74424c85ad5016bcf65c9b13/FLAG763034ddd [2020-09-17 02:33:17,451 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4de0dcb53/0234eaeb74424c85ad5016bcf65c9b13 [2020-09-17 02:33:17,470 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-17 02:33:17,477 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-09-17 02:33:17,479 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-17 02:33:17,479 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-17 02:33:17,484 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-17 02:33:17,485 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.09 02:33:17" (1/1) ... [2020-09-17 02:33:17,490 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b6d95f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:33:17, skipping insertion in model container [2020-09-17 02:33:17,491 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.09 02:33:17" (1/1) ... [2020-09-17 02:33:17,501 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-17 02:33:17,555 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-17 02:33:18,149 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-17 02:33:18,180 INFO L203 MainTranslator]: Completed pre-run [2020-09-17 02:33:18,266 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-17 02:33:18,372 INFO L208 MainTranslator]: Completed translation [2020-09-17 02:33:18,374 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:33:18 WrapperNode [2020-09-17 02:33:18,375 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-17 02:33:18,377 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-09-17 02:33:18,377 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-09-17 02:33:18,378 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-09-17 02:33:18,393 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:33:18" (1/1) ... [2020-09-17 02:33:18,448 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:33:18" (1/1) ... [2020-09-17 02:33:18,491 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-09-17 02:33:18,494 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-17 02:33:18,495 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-17 02:33:18,495 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-17 02:33:18,510 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:33:18" (1/1) ... [2020-09-17 02:33:18,510 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:33:18" (1/1) ... [2020-09-17 02:33:18,520 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:33:18" (1/1) ... [2020-09-17 02:33:18,521 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:33:18" (1/1) ... [2020-09-17 02:33:18,545 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:33:18" (1/1) ... [2020-09-17 02:33:18,554 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:33:18" (1/1) ... [2020-09-17 02:33:18,559 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:33:18" (1/1) ... [2020-09-17 02:33:18,564 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-17 02:33:18,564 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-17 02:33:18,565 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-17 02:33:18,565 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-17 02:33:18,566 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:33:18" (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 [2020-09-17 02:33:18,667 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-09-17 02:33:18,667 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-09-17 02:33:18,668 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-09-17 02:33:18,668 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-09-17 02:33:18,668 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-17 02:33:18,668 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-09-17 02:33:18,669 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-17 02:33:18,669 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-17 02:33:18,669 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-09-17 02:33:18,669 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-17 02:33:18,669 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-17 02:33:18,672 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-09-17 02:33:19,072 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-17 02:33:19,072 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-09-17 02:33:19,079 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.09 02:33:19 BoogieIcfgContainer [2020-09-17 02:33:19,079 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-17 02:33:19,081 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-17 02:33:19,081 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-17 02:33:19,086 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-17 02:33:19,086 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.09 02:33:17" (1/3) ... [2020-09-17 02:33:19,088 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61cd78e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.09 02:33:19, skipping insertion in model container [2020-09-17 02:33:19,088 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:33:18" (2/3) ... [2020-09-17 02:33:19,089 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61cd78e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.09 02:33:19, skipping insertion in model container [2020-09-17 02:33:19,089 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.09 02:33:19" (3/3) ... [2020-09-17 02:33:19,092 INFO L109 eAbstractionObserver]: Analyzing ICFG triangular-longer-2.i [2020-09-17 02:33:19,112 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-09-17 02:33:19,112 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-17 02:33:19,124 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-17 02:33:19,125 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-09-17 02:33:19,161 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:33:19,162 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:33:19,162 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:33:19,162 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:33:19,163 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:33:19,164 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:33:19,164 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:33:19,164 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:33:19,165 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:33:19,165 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:33:19,165 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:33:19,166 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:33:19,166 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:33:19,166 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:33:19,167 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:33:19,167 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:33:19,168 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:33:19,170 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:33:19,170 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:33:19,171 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:33:19,171 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:33:19,171 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:33:19,172 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:33:19,172 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:33:19,172 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:33:19,173 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:33:19,173 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:33:19,173 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:33:19,179 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:33:19,179 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:33:19,179 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:33:19,180 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:33:19,180 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:33:19,180 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:33:19,200 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:33:19,200 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:33:19,201 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:33:19,201 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:33:19,201 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:33:19,202 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:33:19,228 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-09-17 02:33:19,258 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-17 02:33:19,258 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-17 02:33:19,258 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-17 02:33:19,259 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-17 02:33:19,259 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-17 02:33:19,259 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-17 02:33:19,259 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-17 02:33:19,260 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-17 02:33:19,282 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 57 places, 55 transitions, 120 flow [2020-09-17 02:33:19,285 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-09-17 02:33:19,339 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-09-17 02:33:19,339 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-09-17 02:33:19,348 INFO L80 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 53 events. 5/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 79 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2020-09-17 02:33:19,351 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-09-17 02:33:19,372 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-09-17 02:33:19,372 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-09-17 02:33:19,374 INFO L80 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 53 events. 5/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 79 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2020-09-17 02:33:19,376 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 924 [2020-09-17 02:33:19,378 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-09-17 02:33:20,675 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2020-09-17 02:33:20,956 INFO L206 etLargeBlockEncoding]: Checked pairs total: 851 [2020-09-17 02:33:20,956 INFO L214 etLargeBlockEncoding]: Total number of compositions: 42 [2020-09-17 02:33:20,962 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 40 flow [2020-09-17 02:33:20,977 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-09-17 02:33:20,980 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-09-17 02:33:20,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-09-17 02:33:20,990 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:33:20,992 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-09-17 02:33:20,992 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:33:21,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:33:21,002 INFO L82 PathProgramCache]: Analyzing trace with hash -1798862799, now seen corresponding path program 1 times [2020-09-17 02:33:21,017 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:33:21,018 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67889156] [2020-09-17 02:33:21,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:33:21,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:21,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:21,330 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67889156] [2020-09-17 02:33:21,332 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-17 02:33:21,333 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-17 02:33:21,334 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091742379] [2020-09-17 02:33:21,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-17 02:33:21,342 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:33:21,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-17 02:33:21,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-17 02:33:21,371 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-09-17 02:33:21,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:33:21,484 INFO L93 Difference]: Finished difference Result 75 states and 190 transitions. [2020-09-17 02:33:21,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-17 02:33:21,486 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-09-17 02:33:21,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:33:21,505 INFO L225 Difference]: With dead ends: 75 [2020-09-17 02:33:21,506 INFO L226 Difference]: Without dead ends: 42 [2020-09-17 02:33:21,509 INFO L675 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 [2020-09-17 02:33:21,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-09-17 02:33:21,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-09-17 02:33:21,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-17 02:33:21,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-09-17 02:33:21,570 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 6 [2020-09-17 02:33:21,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:33:21,570 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-09-17 02:33:21,570 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-17 02:33:21,571 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-09-17 02:33:21,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-09-17 02:33:21,572 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:33:21,572 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:33:21,572 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-17 02:33:21,573 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:33:21,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:33:21,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1777031324, now seen corresponding path program 1 times [2020-09-17 02:33:21,573 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:33:21,574 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692001482] [2020-09-17 02:33:21,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:33:21,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:21,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:21,685 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692001482] [2020-09-17 02:33:21,685 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-17 02:33:21,685 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-17 02:33:21,686 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142271920] [2020-09-17 02:33:21,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-17 02:33:21,688 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:33:21,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-17 02:33:21,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-17 02:33:21,689 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2020-09-17 02:33:21,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:33:21,731 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-09-17 02:33:21,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-17 02:33:21,732 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-09-17 02:33:21,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:33:21,733 INFO L225 Difference]: With dead ends: 56 [2020-09-17 02:33:21,733 INFO L226 Difference]: Without dead ends: 50 [2020-09-17 02:33:21,735 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-09-17 02:33:21,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-09-17 02:33:21,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-09-17 02:33:21,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-17 02:33:21,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-09-17 02:33:21,744 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-09-17 02:33:21,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:33:21,745 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-09-17 02:33:21,746 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-17 02:33:21,746 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-09-17 02:33:21,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-17 02:33:21,747 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:33:21,747 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:33:21,747 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-17 02:33:21,747 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:33:21,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:33:21,748 INFO L82 PathProgramCache]: Analyzing trace with hash 1669374595, now seen corresponding path program 1 times [2020-09-17 02:33:21,748 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:33:21,749 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724164768] [2020-09-17 02:33:21,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:33:21,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:21,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:21,884 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724164768] [2020-09-17 02:33:21,884 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-17 02:33:21,884 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-17 02:33:21,885 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788921960] [2020-09-17 02:33:21,885 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-17 02:33:21,885 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:33:21,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-17 02:33:21,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-17 02:33:21,886 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 6 states. [2020-09-17 02:33:21,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:33:21,984 INFO L93 Difference]: Finished difference Result 78 states and 180 transitions. [2020-09-17 02:33:21,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-17 02:33:21,985 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-17 02:33:21,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:33:21,987 INFO L225 Difference]: With dead ends: 78 [2020-09-17 02:33:21,987 INFO L226 Difference]: Without dead ends: 71 [2020-09-17 02:33:21,988 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-09-17 02:33:21,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-09-17 02:33:21,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 46. [2020-09-17 02:33:21,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-17 02:33:21,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-09-17 02:33:21,998 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 10 [2020-09-17 02:33:21,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:33:21,998 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-09-17 02:33:21,999 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-17 02:33:21,999 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-09-17 02:33:22,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-17 02:33:22,000 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:33:22,001 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:33:22,001 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-17 02:33:22,001 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:33:22,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:33:22,002 INFO L82 PathProgramCache]: Analyzing trace with hash 1669391335, now seen corresponding path program 2 times [2020-09-17 02:33:22,002 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:33:22,002 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968192179] [2020-09-17 02:33:22,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:33:22,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:22,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:22,108 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968192179] [2020-09-17 02:33:22,108 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-17 02:33:22,108 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-17 02:33:22,108 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861698628] [2020-09-17 02:33:22,109 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-17 02:33:22,109 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:33:22,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-17 02:33:22,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-17 02:33:22,110 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 6 states. [2020-09-17 02:33:22,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:33:22,212 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-09-17 02:33:22,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-17 02:33:22,212 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-17 02:33:22,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:33:22,213 INFO L225 Difference]: With dead ends: 54 [2020-09-17 02:33:22,213 INFO L226 Difference]: Without dead ends: 43 [2020-09-17 02:33:22,214 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-09-17 02:33:22,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-09-17 02:33:22,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-09-17 02:33:22,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-17 02:33:22,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 80 transitions. [2020-09-17 02:33:22,220 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 80 transitions. Word has length 10 [2020-09-17 02:33:22,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:33:22,221 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 80 transitions. [2020-09-17 02:33:22,221 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-17 02:33:22,221 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 80 transitions. [2020-09-17 02:33:22,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-17 02:33:22,222 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:33:22,222 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:33:22,222 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-17 02:33:22,223 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:33:22,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:33:22,223 INFO L82 PathProgramCache]: Analyzing trace with hash 447691255, now seen corresponding path program 3 times [2020-09-17 02:33:22,223 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:33:22,224 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344482838] [2020-09-17 02:33:22,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:33:22,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:22,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:22,306 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344482838] [2020-09-17 02:33:22,307 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-17 02:33:22,307 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-17 02:33:22,307 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815916902] [2020-09-17 02:33:22,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-17 02:33:22,308 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:33:22,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-17 02:33:22,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-17 02:33:22,309 INFO L87 Difference]: Start difference. First operand 34 states and 80 transitions. Second operand 6 states. [2020-09-17 02:33:22,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:33:22,397 INFO L93 Difference]: Finished difference Result 57 states and 133 transitions. [2020-09-17 02:33:22,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-17 02:33:22,398 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-17 02:33:22,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:33:22,399 INFO L225 Difference]: With dead ends: 57 [2020-09-17 02:33:22,399 INFO L226 Difference]: Without dead ends: 51 [2020-09-17 02:33:22,399 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-09-17 02:33:22,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-09-17 02:33:22,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 40. [2020-09-17 02:33:22,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-17 02:33:22,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-09-17 02:33:22,406 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 10 [2020-09-17 02:33:22,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:33:22,406 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-09-17 02:33:22,407 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-17 02:33:22,407 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-09-17 02:33:22,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-17 02:33:22,408 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:33:22,408 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:33:22,408 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-17 02:33:22,408 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:33:22,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:33:22,409 INFO L82 PathProgramCache]: Analyzing trace with hash 211540140, now seen corresponding path program 4 times [2020-09-17 02:33:22,409 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:33:22,409 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384928261] [2020-09-17 02:33:22,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:33:22,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:22,543 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:22,544 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384928261] [2020-09-17 02:33:22,544 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310778692] [2020-09-17 02:33:22,544 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 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 [2020-09-17 02:33:22,645 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:33:22,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:33:22,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-17 02:33:22,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:33:22,725 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:33:22,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:22,752 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:33:22,753 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-09-17 02:33:22,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133796147] [2020-09-17 02:33:22,754 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-17 02:33:22,754 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:33:22,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-17 02:33:22,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-09-17 02:33:22,755 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 8 states. [2020-09-17 02:33:22,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:33:22,911 INFO L93 Difference]: Finished difference Result 48 states and 117 transitions. [2020-09-17 02:33:22,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-17 02:33:22,912 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-09-17 02:33:22,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:33:22,914 INFO L225 Difference]: With dead ends: 48 [2020-09-17 02:33:22,914 INFO L226 Difference]: Without dead ends: 43 [2020-09-17 02:33:22,917 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:33:22,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-09-17 02:33:22,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-09-17 02:33:22,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-17 02:33:22,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 82 transitions. [2020-09-17 02:33:22,928 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 82 transitions. Word has length 11 [2020-09-17 02:33:22,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:33:22,929 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 82 transitions. [2020-09-17 02:33:22,929 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-17 02:33:22,930 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 82 transitions. [2020-09-17 02:33:22,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-17 02:33:22,932 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:33:22,933 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:33:23,147 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-09-17 02:33:23,148 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:33:23,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:33:23,149 INFO L82 PathProgramCache]: Analyzing trace with hash 976950295, now seen corresponding path program 5 times [2020-09-17 02:33:23,149 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:33:23,149 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070246910] [2020-09-17 02:33:23,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:33:23,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:23,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:23,315 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070246910] [2020-09-17 02:33:23,316 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888063525] [2020-09-17 02:33:23,316 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 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 [2020-09-17 02:33:23,396 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:33:23,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:33:23,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-17 02:33:23,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:33:23,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:23,417 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:33:23,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-09-17 02:33:23,418 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443366791] [2020-09-17 02:33:23,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-17 02:33:23,419 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:33:23,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-17 02:33:23,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-17 02:33:23,419 INFO L87 Difference]: Start difference. First operand 34 states and 82 transitions. Second operand 7 states. [2020-09-17 02:33:23,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:33:23,517 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-09-17 02:33:23,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-17 02:33:23,518 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-09-17 02:33:23,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:33:23,518 INFO L225 Difference]: With dead ends: 54 [2020-09-17 02:33:23,519 INFO L226 Difference]: Without dead ends: 48 [2020-09-17 02:33:23,519 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-09-17 02:33:23,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-09-17 02:33:23,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2020-09-17 02:33:23,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-17 02:33:23,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 101 transitions. [2020-09-17 02:33:23,525 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 101 transitions. Word has length 11 [2020-09-17 02:33:23,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:33:23,526 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 101 transitions. [2020-09-17 02:33:23,526 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-17 02:33:23,526 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 101 transitions. [2020-09-17 02:33:23,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-17 02:33:23,527 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:33:23,527 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:33:23,728 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:33:23,729 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:33:23,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:33:23,730 INFO L82 PathProgramCache]: Analyzing trace with hash 993037435, now seen corresponding path program 6 times [2020-09-17 02:33:23,730 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:33:23,731 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189618421] [2020-09-17 02:33:23,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:33:23,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:23,848 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:23,849 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189618421] [2020-09-17 02:33:23,850 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046523051] [2020-09-17 02:33:23,850 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 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 [2020-09-17 02:33:23,909 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-17 02:33:23,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:33:23,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-17 02:33:23,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:33:23,944 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:33:23,967 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:23,969 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:33:23,969 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-09-17 02:33:23,970 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977793745] [2020-09-17 02:33:23,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-17 02:33:23,970 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:33:23,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-17 02:33:23,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-17 02:33:23,971 INFO L87 Difference]: Start difference. First operand 42 states and 101 transitions. Second operand 8 states. [2020-09-17 02:33:24,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:33:24,119 INFO L93 Difference]: Finished difference Result 58 states and 133 transitions. [2020-09-17 02:33:24,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-17 02:33:24,120 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-09-17 02:33:24,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:33:24,121 INFO L225 Difference]: With dead ends: 58 [2020-09-17 02:33:24,121 INFO L226 Difference]: Without dead ends: 52 [2020-09-17 02:33:24,123 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-09-17 02:33:24,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-09-17 02:33:24,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-09-17 02:33:24,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-17 02:33:24,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-09-17 02:33:24,136 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 11 [2020-09-17 02:33:24,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:33:24,136 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-09-17 02:33:24,136 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-17 02:33:24,137 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-09-17 02:33:24,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-17 02:33:24,138 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:33:24,140 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:33:24,346 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:33:24,347 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:33:24,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:33:24,348 INFO L82 PathProgramCache]: Analyzing trace with hash 993527545, now seen corresponding path program 7 times [2020-09-17 02:33:24,348 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:33:24,348 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589791913] [2020-09-17 02:33:24,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:33:24,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:24,449 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:24,450 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589791913] [2020-09-17 02:33:24,450 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10456618] [2020-09-17 02:33:24,450 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 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 [2020-09-17 02:33:24,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:24,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-17 02:33:24,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:33:24,549 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:24,550 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:33:24,550 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-09-17 02:33:24,551 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015325669] [2020-09-17 02:33:24,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-17 02:33:24,552 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:33:24,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-17 02:33:24,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-09-17 02:33:24,553 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 7 states. [2020-09-17 02:33:24,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:33:24,753 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-09-17 02:33:24,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-17 02:33:24,754 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-09-17 02:33:24,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:33:24,755 INFO L225 Difference]: With dead ends: 78 [2020-09-17 02:33:24,755 INFO L226 Difference]: Without dead ends: 72 [2020-09-17 02:33:24,756 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:33:24,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-17 02:33:24,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 46. [2020-09-17 02:33:24,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-17 02:33:24,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 117 transitions. [2020-09-17 02:33:24,763 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 117 transitions. Word has length 11 [2020-09-17 02:33:24,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:33:24,763 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 117 transitions. [2020-09-17 02:33:24,763 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-17 02:33:24,763 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 117 transitions. [2020-09-17 02:33:24,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-17 02:33:24,764 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:33:24,764 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:33:24,978 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:33:24,978 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:33:24,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:33:24,979 INFO L82 PathProgramCache]: Analyzing trace with hash 993544285, now seen corresponding path program 8 times [2020-09-17 02:33:24,980 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:33:24,981 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958995880] [2020-09-17 02:33:24,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:33:24,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:25,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:25,060 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958995880] [2020-09-17 02:33:25,060 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387551194] [2020-09-17 02:33:25,060 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 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 [2020-09-17 02:33:25,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:33:25,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:33:25,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-17 02:33:25,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:33:25,207 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:33:25,229 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:25,229 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:33:25,230 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-09-17 02:33:25,231 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613036665] [2020-09-17 02:33:25,231 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-17 02:33:25,231 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:33:25,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-17 02:33:25,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-17 02:33:25,234 INFO L87 Difference]: Start difference. First operand 46 states and 117 transitions. Second operand 8 states. [2020-09-17 02:33:25,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:33:25,513 INFO L93 Difference]: Finished difference Result 62 states and 145 transitions. [2020-09-17 02:33:25,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-17 02:33:25,515 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-09-17 02:33:25,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:33:25,516 INFO L225 Difference]: With dead ends: 62 [2020-09-17 02:33:25,516 INFO L226 Difference]: Without dead ends: 54 [2020-09-17 02:33:25,517 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:33:25,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-17 02:33:25,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 43. [2020-09-17 02:33:25,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-09-17 02:33:25,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 105 transitions. [2020-09-17 02:33:25,531 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 105 transitions. Word has length 11 [2020-09-17 02:33:25,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:33:25,532 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 105 transitions. [2020-09-17 02:33:25,532 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-17 02:33:25,532 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 105 transitions. [2020-09-17 02:33:25,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-17 02:33:25,533 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:33:25,533 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:33:25,750 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-09-17 02:33:25,751 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:33:25,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:33:25,751 INFO L82 PathProgramCache]: Analyzing trace with hash -2048766974, now seen corresponding path program 9 times [2020-09-17 02:33:25,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:33:25,752 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174987324] [2020-09-17 02:33:25,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:33:25,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:25,835 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:25,836 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174987324] [2020-09-17 02:33:25,836 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076681924] [2020-09-17 02:33:25,837 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 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 [2020-09-17 02:33:25,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-17 02:33:25,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:33:25,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-17 02:33:25,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:33:25,927 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:25,928 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:33:25,928 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-09-17 02:33:25,929 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077802661] [2020-09-17 02:33:25,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-17 02:33:25,930 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:33:25,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-17 02:33:25,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-09-17 02:33:25,931 INFO L87 Difference]: Start difference. First operand 43 states and 105 transitions. Second operand 8 states. [2020-09-17 02:33:26,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:33:26,070 INFO L93 Difference]: Finished difference Result 64 states and 147 transitions. [2020-09-17 02:33:26,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-17 02:33:26,071 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-09-17 02:33:26,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:33:26,072 INFO L225 Difference]: With dead ends: 64 [2020-09-17 02:33:26,072 INFO L226 Difference]: Without dead ends: 58 [2020-09-17 02:33:26,073 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:33:26,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-09-17 02:33:26,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 45. [2020-09-17 02:33:26,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-17 02:33:26,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 109 transitions. [2020-09-17 02:33:26,078 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 109 transitions. Word has length 12 [2020-09-17 02:33:26,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:33:26,078 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 109 transitions. [2020-09-17 02:33:26,079 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-17 02:33:26,079 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 109 transitions. [2020-09-17 02:33:26,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-17 02:33:26,080 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:33:26,080 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:33:26,292 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:33:26,293 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:33:26,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:33:26,294 INFO L82 PathProgramCache]: Analyzing trace with hash -2032679834, now seen corresponding path program 10 times [2020-09-17 02:33:26,294 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:33:26,295 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046930254] [2020-09-17 02:33:26,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:33:26,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:26,421 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:26,422 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046930254] [2020-09-17 02:33:26,422 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166717101] [2020-09-17 02:33:26,423 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 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 [2020-09-17 02:33:26,502 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:33:26,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:33:26,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-17 02:33:26,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:33:26,559 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:33:26,580 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:26,581 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:33:26,581 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-09-17 02:33:26,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108839087] [2020-09-17 02:33:26,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-17 02:33:26,582 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:33:26,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-17 02:33:26,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-17 02:33:26,583 INFO L87 Difference]: Start difference. First operand 45 states and 109 transitions. Second operand 9 states. [2020-09-17 02:33:26,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:33:26,811 INFO L93 Difference]: Finished difference Result 61 states and 141 transitions. [2020-09-17 02:33:26,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-17 02:33:26,811 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-09-17 02:33:26,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:33:26,812 INFO L225 Difference]: With dead ends: 61 [2020-09-17 02:33:26,813 INFO L226 Difference]: Without dead ends: 55 [2020-09-17 02:33:26,814 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2020-09-17 02:33:26,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-17 02:33:26,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2020-09-17 02:33:26,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-09-17 02:33:26,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-09-17 02:33:26,829 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 12 [2020-09-17 02:33:26,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:33:26,830 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-09-17 02:33:26,830 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-17 02:33:26,830 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-09-17 02:33:26,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-17 02:33:26,831 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:33:26,832 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:33:27,045 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:33:27,046 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:33:27,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:33:27,047 INFO L82 PathProgramCache]: Analyzing trace with hash -2032189724, now seen corresponding path program 11 times [2020-09-17 02:33:27,047 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:33:27,048 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169518826] [2020-09-17 02:33:27,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:33:27,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:27,188 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:27,190 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169518826] [2020-09-17 02:33:27,191 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773726746] [2020-09-17 02:33:27,191 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 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 [2020-09-17 02:33:27,271 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:33:27,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:33:27,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-17 02:33:27,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:33:27,304 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:27,305 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:33:27,305 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-09-17 02:33:27,306 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656713902] [2020-09-17 02:33:27,306 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-17 02:33:27,307 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:33:27,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-17 02:33:27,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-09-17 02:33:27,310 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 8 states. [2020-09-17 02:33:27,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:33:27,535 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-09-17 02:33:27,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-17 02:33:27,536 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-09-17 02:33:27,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:33:27,537 INFO L225 Difference]: With dead ends: 77 [2020-09-17 02:33:27,538 INFO L226 Difference]: Without dead ends: 71 [2020-09-17 02:33:27,538 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:33:27,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-09-17 02:33:27,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 48. [2020-09-17 02:33:27,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-09-17 02:33:27,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 121 transitions. [2020-09-17 02:33:27,544 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 121 transitions. Word has length 12 [2020-09-17 02:33:27,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:33:27,545 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 121 transitions. [2020-09-17 02:33:27,545 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-17 02:33:27,545 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 121 transitions. [2020-09-17 02:33:27,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-17 02:33:27,546 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:33:27,546 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:33:27,759 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-09-17 02:33:27,760 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:33:27,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:33:27,761 INFO L82 PathProgramCache]: Analyzing trace with hash -2032172984, now seen corresponding path program 12 times [2020-09-17 02:33:27,761 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:33:27,762 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793912371] [2020-09-17 02:33:27,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:33:27,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:27,829 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:27,829 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793912371] [2020-09-17 02:33:27,829 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681613931] [2020-09-17 02:33:27,830 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 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 [2020-09-17 02:33:27,875 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-17 02:33:27,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:33:27,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 02:33:27,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:33:27,923 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:27,924 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:33:27,924 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-09-17 02:33:27,924 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99914881] [2020-09-17 02:33:27,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-17 02:33:27,925 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:33:27,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-17 02:33:27,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-09-17 02:33:27,926 INFO L87 Difference]: Start difference. First operand 48 states and 121 transitions. Second operand 9 states. [2020-09-17 02:33:28,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:33:28,177 INFO L93 Difference]: Finished difference Result 56 states and 133 transitions. [2020-09-17 02:33:28,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-17 02:33:28,178 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-09-17 02:33:28,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:33:28,179 INFO L225 Difference]: With dead ends: 56 [2020-09-17 02:33:28,180 INFO L226 Difference]: Without dead ends: 48 [2020-09-17 02:33:28,180 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2020-09-17 02:33:28,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-09-17 02:33:28,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 37. [2020-09-17 02:33:28,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-09-17 02:33:28,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 88 transitions. [2020-09-17 02:33:28,189 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 88 transitions. Word has length 12 [2020-09-17 02:33:28,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:33:28,189 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 88 transitions. [2020-09-17 02:33:28,189 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-17 02:33:28,189 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 88 transitions. [2020-09-17 02:33:28,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-17 02:33:28,192 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:33:28,192 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:33:28,406 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:33:28,407 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:33:28,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:33:28,408 INFO L82 PathProgramCache]: Analyzing trace with hash 735118070, now seen corresponding path program 13 times [2020-09-17 02:33:28,408 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:33:28,409 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133069278] [2020-09-17 02:33:28,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:33:28,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:28,496 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:28,497 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133069278] [2020-09-17 02:33:28,497 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219677067] [2020-09-17 02:33:28,497 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 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 [2020-09-17 02:33:28,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:28,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-17 02:33:28,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:33:28,578 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:33:28,590 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:28,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:33:28,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-09-17 02:33:28,591 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939520788] [2020-09-17 02:33:28,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-17 02:33:28,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:33:28,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-17 02:33:28,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-09-17 02:33:28,592 INFO L87 Difference]: Start difference. First operand 37 states and 88 transitions. Second operand 9 states. [2020-09-17 02:33:28,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:33:28,855 INFO L93 Difference]: Finished difference Result 60 states and 143 transitions. [2020-09-17 02:33:28,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-17 02:33:28,856 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-09-17 02:33:28,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:33:28,861 INFO L225 Difference]: With dead ends: 60 [2020-09-17 02:33:28,861 INFO L226 Difference]: Without dead ends: 55 [2020-09-17 02:33:28,862 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-09-17 02:33:28,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-17 02:33:28,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 46. [2020-09-17 02:33:28,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-17 02:33:28,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-09-17 02:33:28,868 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 12 [2020-09-17 02:33:28,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:33:28,869 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-09-17 02:33:28,869 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-17 02:33:28,869 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-09-17 02:33:28,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:33:28,873 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:33:28,873 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:33:29,078 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-09-17 02:33:29,081 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:33:29,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:33:29,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1427163243, now seen corresponding path program 14 times [2020-09-17 02:33:29,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:33:29,082 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35478351] [2020-09-17 02:33:29,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:33:29,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:29,192 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:29,193 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35478351] [2020-09-17 02:33:29,193 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402206156] [2020-09-17 02:33:29,193 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 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 [2020-09-17 02:33:29,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:33:29,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:33:29,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 02:33:29,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:33:29,314 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:33:29,336 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:29,336 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:33:29,337 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-09-17 02:33:29,337 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285261599] [2020-09-17 02:33:29,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-17 02:33:29,338 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:33:29,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-17 02:33:29,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-09-17 02:33:29,339 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 10 states. [2020-09-17 02:33:29,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:33:29,650 INFO L93 Difference]: Finished difference Result 54 states and 133 transitions. [2020-09-17 02:33:29,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-17 02:33:29,651 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-17 02:33:29,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:33:29,652 INFO L225 Difference]: With dead ends: 54 [2020-09-17 02:33:29,652 INFO L226 Difference]: Without dead ends: 49 [2020-09-17 02:33:29,654 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2020-09-17 02:33:29,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-09-17 02:33:29,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2020-09-17 02:33:29,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-09-17 02:33:29,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 92 transitions. [2020-09-17 02:33:29,658 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 92 transitions. Word has length 13 [2020-09-17 02:33:29,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:33:29,658 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 92 transitions. [2020-09-17 02:33:29,659 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-17 02:33:29,659 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 92 transitions. [2020-09-17 02:33:29,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:33:29,659 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:33:29,660 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:33:29,871 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-09-17 02:33:29,872 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:33:29,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:33:29,872 INFO L82 PathProgramCache]: Analyzing trace with hash -1748588394, now seen corresponding path program 15 times [2020-09-17 02:33:29,873 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:33:29,873 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610732099] [2020-09-17 02:33:29,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:33:29,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:29,967 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:29,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610732099] [2020-09-17 02:33:29,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457857155] [2020-09-17 02:33:29,968 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 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 [2020-09-17 02:33:30,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-17 02:33:30,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:33:30,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 02:33:30,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:33:30,065 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:30,066 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:33:30,066 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-09-17 02:33:30,066 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646287554] [2020-09-17 02:33:30,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-17 02:33:30,067 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:33:30,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-17 02:33:30,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-09-17 02:33:30,068 INFO L87 Difference]: Start difference. First operand 38 states and 92 transitions. Second operand 9 states. [2020-09-17 02:33:30,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:33:30,216 INFO L93 Difference]: Finished difference Result 60 states and 139 transitions. [2020-09-17 02:33:30,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-17 02:33:30,217 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-09-17 02:33:30,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:33:30,218 INFO L225 Difference]: With dead ends: 60 [2020-09-17 02:33:30,218 INFO L226 Difference]: Without dead ends: 54 [2020-09-17 02:33:30,219 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-09-17 02:33:30,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-17 02:33:30,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2020-09-17 02:33:30,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-17 02:33:30,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2020-09-17 02:33:30,223 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 13 [2020-09-17 02:33:30,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:33:30,224 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2020-09-17 02:33:30,224 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-17 02:33:30,224 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2020-09-17 02:33:30,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:33:30,225 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:33:30,225 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:33:30,435 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-09-17 02:33:30,436 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:33:30,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:33:30,437 INFO L82 PathProgramCache]: Analyzing trace with hash 826251258, now seen corresponding path program 16 times [2020-09-17 02:33:30,437 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:33:30,438 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005617350] [2020-09-17 02:33:30,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:33:30,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:30,579 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:30,580 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005617350] [2020-09-17 02:33:30,580 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771182558] [2020-09-17 02:33:30,581 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 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 [2020-09-17 02:33:30,640 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:33:30,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:33:30,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 02:33:30,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:33:30,663 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:33:30,684 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:30,685 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:33:30,686 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-09-17 02:33:30,686 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133894084] [2020-09-17 02:33:30,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-17 02:33:30,687 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:33:30,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-17 02:33:30,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-17 02:33:30,688 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand 10 states. [2020-09-17 02:33:30,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:33:30,878 INFO L93 Difference]: Finished difference Result 66 states and 151 transitions. [2020-09-17 02:33:30,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-17 02:33:30,884 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-17 02:33:30,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:33:30,885 INFO L225 Difference]: With dead ends: 66 [2020-09-17 02:33:30,885 INFO L226 Difference]: Without dead ends: 60 [2020-09-17 02:33:30,886 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2020-09-17 02:33:30,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-17 02:33:30,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 44. [2020-09-17 02:33:30,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-09-17 02:33:30,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-09-17 02:33:30,890 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 13 [2020-09-17 02:33:30,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:33:30,890 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-09-17 02:33:30,890 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-17 02:33:30,890 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-09-17 02:33:30,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:33:30,891 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:33:30,891 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:33:31,102 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-09-17 02:33:31,103 INFO L427 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:33:31,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:33:31,103 INFO L82 PathProgramCache]: Analyzing trace with hash 1297246968, now seen corresponding path program 17 times [2020-09-17 02:33:31,104 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:33:31,104 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507501476] [2020-09-17 02:33:31,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:33:31,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:31,213 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:31,214 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507501476] [2020-09-17 02:33:31,214 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237640048] [2020-09-17 02:33:31,214 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 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 [2020-09-17 02:33:31,282 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-17 02:33:31,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:33:31,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 02:33:31,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:33:31,311 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:31,312 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:33:31,312 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-09-17 02:33:31,312 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026512413] [2020-09-17 02:33:31,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-17 02:33:31,313 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:33:31,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-17 02:33:31,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-17 02:33:31,314 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 9 states. [2020-09-17 02:33:31,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:33:31,584 INFO L93 Difference]: Finished difference Result 67 states and 155 transitions. [2020-09-17 02:33:31,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-17 02:33:31,585 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-09-17 02:33:31,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:33:31,586 INFO L225 Difference]: With dead ends: 67 [2020-09-17 02:33:31,586 INFO L226 Difference]: Without dead ends: 61 [2020-09-17 02:33:31,587 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:33:31,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-17 02:33:31,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 47. [2020-09-17 02:33:31,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-09-17 02:33:31,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 115 transitions. [2020-09-17 02:33:31,593 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 115 transitions. Word has length 13 [2020-09-17 02:33:31,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:33:31,593 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 115 transitions. [2020-09-17 02:33:31,593 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-17 02:33:31,593 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 115 transitions. [2020-09-17 02:33:31,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:33:31,594 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:33:31,594 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:33:31,807 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:33:31,807 INFO L427 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:33:31,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:33:31,808 INFO L82 PathProgramCache]: Analyzing trace with hash 1313334108, now seen corresponding path program 18 times [2020-09-17 02:33:31,809 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:33:31,809 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004484855] [2020-09-17 02:33:31,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:33:31,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:31,928 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:31,929 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004484855] [2020-09-17 02:33:31,929 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570943154] [2020-09-17 02:33:31,929 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 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 [2020-09-17 02:33:31,987 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-17 02:33:31,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:33:31,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 02:33:31,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:33:32,018 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:33:32,065 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:32,065 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:33:32,065 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-09-17 02:33:32,065 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339842538] [2020-09-17 02:33:32,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-17 02:33:32,066 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:33:32,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-17 02:33:32,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-09-17 02:33:32,067 INFO L87 Difference]: Start difference. First operand 47 states and 115 transitions. Second operand 10 states. [2020-09-17 02:33:32,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:33:32,334 INFO L93 Difference]: Finished difference Result 69 states and 159 transitions. [2020-09-17 02:33:32,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-17 02:33:32,335 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-17 02:33:32,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:33:32,335 INFO L225 Difference]: With dead ends: 69 [2020-09-17 02:33:32,335 INFO L226 Difference]: Without dead ends: 63 [2020-09-17 02:33:32,336 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-09-17 02:33:32,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-09-17 02:33:32,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 46. [2020-09-17 02:33:32,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-17 02:33:32,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-09-17 02:33:32,339 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 13 [2020-09-17 02:33:32,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:33:32,344 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-09-17 02:33:32,344 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-17 02:33:32,345 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-09-17 02:33:32,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:33:32,345 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:33:32,345 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:33:32,553 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:33:32,554 INFO L427 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:33:32,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:33:32,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1313824218, now seen corresponding path program 19 times [2020-09-17 02:33:32,554 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:33:32,554 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927543378] [2020-09-17 02:33:32,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:33:32,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:32,652 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:32,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927543378] [2020-09-17 02:33:32,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874853867] [2020-09-17 02:33:32,653 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 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 [2020-09-17 02:33:32,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:32,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 02:33:32,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:33:32,746 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:32,747 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:33:32,747 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-09-17 02:33:32,747 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988784952] [2020-09-17 02:33:32,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-17 02:33:32,748 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:33:32,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-17 02:33:32,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-09-17 02:33:32,749 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 9 states. [2020-09-17 02:33:33,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:33:33,009 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-09-17 02:33:33,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-17 02:33:33,010 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-09-17 02:33:33,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:33:33,011 INFO L225 Difference]: With dead ends: 88 [2020-09-17 02:33:33,012 INFO L226 Difference]: Without dead ends: 82 [2020-09-17 02:33:33,012 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=252, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:33:33,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-09-17 02:33:33,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 52. [2020-09-17 02:33:33,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-17 02:33:33,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 133 transitions. [2020-09-17 02:33:33,017 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 133 transitions. Word has length 13 [2020-09-17 02:33:33,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:33:33,018 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 133 transitions. [2020-09-17 02:33:33,018 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-17 02:33:33,018 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 133 transitions. [2020-09-17 02:33:33,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:33:33,018 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:33:33,019 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:33:33,231 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:33:33,232 INFO L427 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:33:33,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:33:33,232 INFO L82 PathProgramCache]: Analyzing trace with hash 1313840958, now seen corresponding path program 20 times [2020-09-17 02:33:33,232 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:33:33,233 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58046152] [2020-09-17 02:33:33,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:33:33,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:33,323 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:33,324 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58046152] [2020-09-17 02:33:33,324 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687576104] [2020-09-17 02:33:33,324 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 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 [2020-09-17 02:33:33,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:33:33,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:33:33,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 02:33:33,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:33:33,416 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:33:33,430 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:33,431 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:33:33,431 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-09-17 02:33:33,432 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540335267] [2020-09-17 02:33:33,432 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-17 02:33:33,432 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:33:33,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-17 02:33:33,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-17 02:33:33,433 INFO L87 Difference]: Start difference. First operand 52 states and 133 transitions. Second operand 10 states. [2020-09-17 02:33:33,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:33:33,802 INFO L93 Difference]: Finished difference Result 69 states and 163 transitions. [2020-09-17 02:33:33,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-17 02:33:33,808 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-17 02:33:33,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:33:33,809 INFO L225 Difference]: With dead ends: 69 [2020-09-17 02:33:33,809 INFO L226 Difference]: Without dead ends: 61 [2020-09-17 02:33:33,810 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2020-09-17 02:33:33,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-17 02:33:33,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 49. [2020-09-17 02:33:33,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-09-17 02:33:33,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 121 transitions. [2020-09-17 02:33:33,814 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 121 transitions. Word has length 13 [2020-09-17 02:33:33,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:33:33,814 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 121 transitions. [2020-09-17 02:33:33,814 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-17 02:33:33,814 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 121 transitions. [2020-09-17 02:33:33,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:33:33,815 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:33:33,815 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:33:34,027 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-09-17 02:33:34,027 INFO L427 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:33:34,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:33:34,028 INFO L82 PathProgramCache]: Analyzing trace with hash -1770024511, now seen corresponding path program 21 times [2020-09-17 02:33:34,028 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:33:34,029 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174813710] [2020-09-17 02:33:34,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:33:34,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:34,160 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:34,161 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174813710] [2020-09-17 02:33:34,161 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866735026] [2020-09-17 02:33:34,161 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 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 [2020-09-17 02:33:34,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-17 02:33:34,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:33:34,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:33:34,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:33:34,264 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:34,264 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:33:34,265 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-09-17 02:33:34,265 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57941440] [2020-09-17 02:33:34,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-17 02:33:34,265 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:33:34,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-17 02:33:34,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-17 02:33:34,269 INFO L87 Difference]: Start difference. First operand 49 states and 121 transitions. Second operand 10 states. [2020-09-17 02:33:34,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:33:34,458 INFO L93 Difference]: Finished difference Result 74 states and 171 transitions. [2020-09-17 02:33:34,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-17 02:33:34,459 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-09-17 02:33:34,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:33:34,460 INFO L225 Difference]: With dead ends: 74 [2020-09-17 02:33:34,460 INFO L226 Difference]: Without dead ends: 68 [2020-09-17 02:33:34,461 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:33:34,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-17 02:33:34,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 51. [2020-09-17 02:33:34,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-17 02:33:34,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-09-17 02:33:34,463 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-09-17 02:33:34,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:33:34,464 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-09-17 02:33:34,464 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-17 02:33:34,464 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-09-17 02:33:34,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:33:34,464 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:33:34,465 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:33:34,672 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-09-17 02:33:34,673 INFO L427 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:33:34,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:33:34,674 INFO L82 PathProgramCache]: Analyzing trace with hash 804815141, now seen corresponding path program 22 times [2020-09-17 02:33:34,674 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:33:34,674 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178921931] [2020-09-17 02:33:34,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:33:34,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:34,784 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:34,785 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178921931] [2020-09-17 02:33:34,785 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165604029] [2020-09-17 02:33:34,785 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 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 [2020-09-17 02:33:34,850 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:33:34,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:33:34,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:33:34,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:33:34,879 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:33:34,894 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:34,894 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:33:34,895 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-09-17 02:33:34,896 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861802357] [2020-09-17 02:33:34,896 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-17 02:33:34,896 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:33:34,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-17 02:33:34,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-09-17 02:33:34,897 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-09-17 02:33:35,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:33:35,192 INFO L93 Difference]: Finished difference Result 71 states and 165 transitions. [2020-09-17 02:33:35,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-17 02:33:35,197 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-17 02:33:35,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:33:35,198 INFO L225 Difference]: With dead ends: 71 [2020-09-17 02:33:35,199 INFO L226 Difference]: Without dead ends: 65 [2020-09-17 02:33:35,199 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:33:35,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-09-17 02:33:35,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 50. [2020-09-17 02:33:35,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-17 02:33:35,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-09-17 02:33:35,203 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-09-17 02:33:35,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:33:35,203 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-09-17 02:33:35,203 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-17 02:33:35,204 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-09-17 02:33:35,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:33:35,204 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:33:35,204 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:33:35,405 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-09-17 02:33:35,406 INFO L427 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:33:35,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:33:35,406 INFO L82 PathProgramCache]: Analyzing trace with hash 1275810851, now seen corresponding path program 23 times [2020-09-17 02:33:35,407 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:33:35,407 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260150130] [2020-09-17 02:33:35,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:33:35,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:35,522 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:35,523 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260150130] [2020-09-17 02:33:35,523 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050241841] [2020-09-17 02:33:35,524 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 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 [2020-09-17 02:33:35,581 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-17 02:33:35,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:33:35,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:33:35,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:33:35,612 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:35,613 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:33:35,613 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-09-17 02:33:35,613 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866176867] [2020-09-17 02:33:35,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-17 02:33:35,614 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:33:35,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-17 02:33:35,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-09-17 02:33:35,615 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-09-17 02:33:35,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:33:35,862 INFO L93 Difference]: Finished difference Result 68 states and 159 transitions. [2020-09-17 02:33:35,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-17 02:33:35,863 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-09-17 02:33:35,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:33:35,864 INFO L225 Difference]: With dead ends: 68 [2020-09-17 02:33:35,864 INFO L226 Difference]: Without dead ends: 62 [2020-09-17 02:33:35,865 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-09-17 02:33:35,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-09-17 02:33:35,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 51. [2020-09-17 02:33:35,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-17 02:33:35,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-09-17 02:33:35,869 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-09-17 02:33:35,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:33:35,869 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-09-17 02:33:35,869 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-17 02:33:35,870 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-09-17 02:33:35,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:33:35,870 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:33:35,870 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:33:36,081 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-09-17 02:33:36,082 INFO L427 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:33:36,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:33:36,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1291897991, now seen corresponding path program 24 times [2020-09-17 02:33:36,083 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:33:36,083 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807393758] [2020-09-17 02:33:36,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:33:36,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:36,211 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:36,212 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807393758] [2020-09-17 02:33:36,212 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627398796] [2020-09-17 02:33:36,213 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 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 [2020-09-17 02:33:36,269 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-17 02:33:36,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:33:36,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:33:36,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:33:36,299 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:33:36,321 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:36,321 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:33:36,322 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-09-17 02:33:36,324 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221387409] [2020-09-17 02:33:36,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-17 02:33:36,325 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:33:36,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-17 02:33:36,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-09-17 02:33:36,326 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-09-17 02:33:36,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:33:36,713 INFO L93 Difference]: Finished difference Result 67 states and 157 transitions. [2020-09-17 02:33:36,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-17 02:33:36,714 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-17 02:33:36,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:33:36,715 INFO L225 Difference]: With dead ends: 67 [2020-09-17 02:33:36,715 INFO L226 Difference]: Without dead ends: 61 [2020-09-17 02:33:36,716 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2020-09-17 02:33:36,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-17 02:33:36,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50. [2020-09-17 02:33:36,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-17 02:33:36,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-09-17 02:33:36,719 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-09-17 02:33:36,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:33:36,719 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-09-17 02:33:36,719 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-17 02:33:36,720 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-09-17 02:33:36,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:33:36,720 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:33:36,721 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:33:36,922 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-09-17 02:33:36,923 INFO L427 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:33:36,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:33:36,924 INFO L82 PathProgramCache]: Analyzing trace with hash 1292388101, now seen corresponding path program 25 times [2020-09-17 02:33:36,924 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:33:36,925 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106331162] [2020-09-17 02:33:36,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:33:36,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:37,042 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:37,043 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106331162] [2020-09-17 02:33:37,043 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511684417] [2020-09-17 02:33:37,044 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 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 [2020-09-17 02:33:37,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:37,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:33:37,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:33:37,119 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:37,119 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:33:37,119 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-09-17 02:33:37,120 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948260025] [2020-09-17 02:33:37,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-17 02:33:37,120 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:33:37,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-17 02:33:37,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-17 02:33:37,122 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-09-17 02:33:37,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:33:37,413 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-09-17 02:33:37,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-17 02:33:37,414 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-09-17 02:33:37,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:33:37,415 INFO L225 Difference]: With dead ends: 83 [2020-09-17 02:33:37,415 INFO L226 Difference]: Without dead ends: 77 [2020-09-17 02:33:37,416 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2020-09-17 02:33:37,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-17 02:33:37,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 54. [2020-09-17 02:33:37,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-17 02:33:37,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 137 transitions. [2020-09-17 02:33:37,419 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 137 transitions. Word has length 14 [2020-09-17 02:33:37,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:33:37,419 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 137 transitions. [2020-09-17 02:33:37,419 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-17 02:33:37,419 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 137 transitions. [2020-09-17 02:33:37,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:33:37,420 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:33:37,420 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:33:37,629 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:33:37,629 INFO L427 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:33:37,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:33:37,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1292404841, now seen corresponding path program 26 times [2020-09-17 02:33:37,630 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:33:37,631 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339321223] [2020-09-17 02:33:37,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:33:37,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:37,728 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:37,729 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339321223] [2020-09-17 02:33:37,729 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992038612] [2020-09-17 02:33:37,729 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 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 [2020-09-17 02:33:37,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:33:37,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:33:37,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:33:37,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:33:37,829 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:37,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:33:37,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-09-17 02:33:37,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179860486] [2020-09-17 02:33:37,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-17 02:33:37,830 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:33:37,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-17 02:33:37,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-09-17 02:33:37,831 INFO L87 Difference]: Start difference. First operand 54 states and 137 transitions. Second operand 11 states. [2020-09-17 02:33:38,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:33:38,195 INFO L93 Difference]: Finished difference Result 62 states and 149 transitions. [2020-09-17 02:33:38,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-17 02:33:38,196 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-17 02:33:38,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:33:38,197 INFO L225 Difference]: With dead ends: 62 [2020-09-17 02:33:38,197 INFO L226 Difference]: Without dead ends: 54 [2020-09-17 02:33:38,197 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2020-09-17 02:33:38,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-17 02:33:38,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 41. [2020-09-17 02:33:38,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-09-17 02:33:38,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 98 transitions. [2020-09-17 02:33:38,200 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 98 transitions. Word has length 14 [2020-09-17 02:33:38,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:33:38,200 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 98 transitions. [2020-09-17 02:33:38,201 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-17 02:33:38,201 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 98 transitions. [2020-09-17 02:33:38,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:33:38,201 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:33:38,201 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:33:38,402 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-09-17 02:33:38,402 INFO L427 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:33:38,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:33:38,403 INFO L82 PathProgramCache]: Analyzing trace with hash 2074380341, now seen corresponding path program 27 times [2020-09-17 02:33:38,403 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:33:38,404 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333268335] [2020-09-17 02:33:38,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:33:38,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:38,502 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:38,502 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333268335] [2020-09-17 02:33:38,502 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63425388] [2020-09-17 02:33:38,503 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 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 [2020-09-17 02:33:38,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-17 02:33:38,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:33:38,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:33:38,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:33:38,591 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:33:38,604 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:38,605 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:33:38,605 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-09-17 02:33:38,605 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778996730] [2020-09-17 02:33:38,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-17 02:33:38,606 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:33:38,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-17 02:33:38,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-09-17 02:33:38,606 INFO L87 Difference]: Start difference. First operand 41 states and 98 transitions. Second operand 11 states. [2020-09-17 02:33:38,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:33:38,964 INFO L93 Difference]: Finished difference Result 68 states and 163 transitions. [2020-09-17 02:33:38,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-17 02:33:38,965 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-17 02:33:38,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:33:38,966 INFO L225 Difference]: With dead ends: 68 [2020-09-17 02:33:38,966 INFO L226 Difference]: Without dead ends: 63 [2020-09-17 02:33:38,967 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:33:38,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-09-17 02:33:38,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 52. [2020-09-17 02:33:38,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-17 02:33:38,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-09-17 02:33:38,970 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 14 [2020-09-17 02:33:38,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:33:38,970 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-09-17 02:33:38,970 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-17 02:33:38,970 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-09-17 02:33:38,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-17 02:33:38,971 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:33:38,971 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:33:39,181 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-09-17 02:33:39,182 INFO L427 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:33:39,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:33:39,182 INFO L82 PathProgramCache]: Analyzing trace with hash 1409860714, now seen corresponding path program 28 times [2020-09-17 02:33:39,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:33:39,183 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758284490] [2020-09-17 02:33:39,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:33:39,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:39,320 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:39,321 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758284490] [2020-09-17 02:33:39,321 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626889410] [2020-09-17 02:33:39,321 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:33:39,372 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:33:39,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:33:39,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:33:39,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:33:39,405 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:33:39,418 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:39,419 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:33:39,419 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-17 02:33:39,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145720288] [2020-09-17 02:33:39,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-17 02:33:39,420 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:33:39,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-17 02:33:39,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-09-17 02:33:39,420 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 12 states. [2020-09-17 02:33:39,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:33:39,806 INFO L93 Difference]: Finished difference Result 60 states and 149 transitions. [2020-09-17 02:33:39,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-17 02:33:39,807 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-17 02:33:39,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:33:39,808 INFO L225 Difference]: With dead ends: 60 [2020-09-17 02:33:39,808 INFO L226 Difference]: Without dead ends: 55 [2020-09-17 02:33:39,809 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=205, Invalid=395, Unknown=0, NotChecked=0, Total=600 [2020-09-17 02:33:39,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-17 02:33:39,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 42. [2020-09-17 02:33:39,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-17 02:33:39,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 102 transitions. [2020-09-17 02:33:39,813 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 102 transitions. Word has length 15 [2020-09-17 02:33:39,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:33:39,813 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 102 transitions. [2020-09-17 02:33:39,813 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-17 02:33:39,813 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 102 transitions. [2020-09-17 02:33:39,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-17 02:33:39,813 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:33:39,814 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:33:40,022 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:33:40,023 INFO L427 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:33:40,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:33:40,024 INFO L82 PathProgramCache]: Analyzing trace with hash -1061217963, now seen corresponding path program 29 times [2020-09-17 02:33:40,024 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:33:40,024 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195361723] [2020-09-17 02:33:40,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:33:40,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:40,158 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:40,159 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195361723] [2020-09-17 02:33:40,159 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052128388] [2020-09-17 02:33:40,159 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 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 [2020-09-17 02:33:40,220 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-17 02:33:40,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:33:40,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:33:40,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:33:40,246 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:40,247 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:33:40,247 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-17 02:33:40,247 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421840740] [2020-09-17 02:33:40,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-17 02:33:40,248 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:33:40,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-17 02:33:40,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-09-17 02:33:40,249 INFO L87 Difference]: Start difference. First operand 42 states and 102 transitions. Second operand 11 states. [2020-09-17 02:33:40,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:33:40,478 INFO L93 Difference]: Finished difference Result 66 states and 153 transitions. [2020-09-17 02:33:40,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-17 02:33:40,479 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-09-17 02:33:40,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:33:40,480 INFO L225 Difference]: With dead ends: 66 [2020-09-17 02:33:40,480 INFO L226 Difference]: Without dead ends: 60 [2020-09-17 02:33:40,481 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2020-09-17 02:33:40,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-17 02:33:40,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2020-09-17 02:33:40,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-17 02:33:40,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 121 transitions. [2020-09-17 02:33:40,486 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 121 transitions. Word has length 15 [2020-09-17 02:33:40,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:33:40,487 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 121 transitions. [2020-09-17 02:33:40,487 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-17 02:33:40,487 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 121 transitions. [2020-09-17 02:33:40,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-17 02:33:40,488 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:33:40,488 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:33:40,702 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:33:40,702 INFO L427 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:33:40,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:33:40,703 INFO L82 PathProgramCache]: Analyzing trace with hash -541474887, now seen corresponding path program 30 times [2020-09-17 02:33:40,704 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:33:40,704 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617607791] [2020-09-17 02:33:40,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:33:40,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:40,893 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:40,894 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617607791] [2020-09-17 02:33:40,894 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072328171] [2020-09-17 02:33:40,895 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 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 [2020-09-17 02:33:40,983 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-17 02:33:40,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:33:40,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:33:40,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:33:41,015 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:33:41,035 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:41,036 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:33:41,036 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-17 02:33:41,036 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850576823] [2020-09-17 02:33:41,036 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-17 02:33:41,037 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:33:41,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-17 02:33:41,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-09-17 02:33:41,038 INFO L87 Difference]: Start difference. First operand 50 states and 121 transitions. Second operand 12 states. [2020-09-17 02:33:41,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:33:41,340 INFO L93 Difference]: Finished difference Result 74 states and 169 transitions. [2020-09-17 02:33:41,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-17 02:33:41,341 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-17 02:33:41,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:33:41,342 INFO L225 Difference]: With dead ends: 74 [2020-09-17 02:33:41,342 INFO L226 Difference]: Without dead ends: 68 [2020-09-17 02:33:41,343 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:33:41,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-17 02:33:41,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 48. [2020-09-17 02:33:41,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-09-17 02:33:41,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 117 transitions. [2020-09-17 02:33:41,347 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 117 transitions. Word has length 15 [2020-09-17 02:33:41,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:33:41,348 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 117 transitions. [2020-09-17 02:33:41,348 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-17 02:33:41,348 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 117 transitions. [2020-09-17 02:33:41,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-17 02:33:41,349 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:33:41,349 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:33:41,562 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-09-17 02:33:41,562 INFO L427 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:33:41,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:33:41,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1113836343, now seen corresponding path program 31 times [2020-09-17 02:33:41,563 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:33:41,564 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056931300] [2020-09-17 02:33:41,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:33:41,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:41,717 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:41,718 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056931300] [2020-09-17 02:33:41,718 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414824138] [2020-09-17 02:33:41,718 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 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 [2020-09-17 02:33:41,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:41,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:33:41,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:33:41,799 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:41,800 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:33:41,800 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-17 02:33:41,800 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644180057] [2020-09-17 02:33:41,801 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-17 02:33:41,801 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:33:41,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-17 02:33:41,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-09-17 02:33:41,802 INFO L87 Difference]: Start difference. First operand 48 states and 117 transitions. Second operand 11 states. [2020-09-17 02:33:42,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:33:42,174 INFO L93 Difference]: Finished difference Result 75 states and 173 transitions. [2020-09-17 02:33:42,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-17 02:33:42,175 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-09-17 02:33:42,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:33:42,176 INFO L225 Difference]: With dead ends: 75 [2020-09-17 02:33:42,176 INFO L226 Difference]: Without dead ends: 69 [2020-09-17 02:33:42,177 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2020-09-17 02:33:42,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-09-17 02:33:42,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 51. [2020-09-17 02:33:42,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-17 02:33:42,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-09-17 02:33:42,180 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 15 [2020-09-17 02:33:42,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:33:42,181 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-09-17 02:33:42,181 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-17 02:33:42,181 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-09-17 02:33:42,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-17 02:33:42,181 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:33:42,182 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:33:42,393 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:33:42,393 INFO L427 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:33:42,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:33:42,394 INFO L82 PathProgramCache]: Analyzing trace with hash -606291301, now seen corresponding path program 32 times [2020-09-17 02:33:42,395 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:33:42,395 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799241309] [2020-09-17 02:33:42,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:33:42,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:42,531 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:42,531 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799241309] [2020-09-17 02:33:42,531 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561305679] [2020-09-17 02:33:42,532 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 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 [2020-09-17 02:33:42,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:33:42,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:33:42,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:33:42,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:33:42,614 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:33:42,629 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:42,630 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:33:42,630 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-17 02:33:42,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687696484] [2020-09-17 02:33:42,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-17 02:33:42,631 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:33:42,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-17 02:33:42,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-09-17 02:33:42,632 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 12 states. [2020-09-17 02:33:43,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:33:43,012 INFO L93 Difference]: Finished difference Result 79 states and 181 transitions. [2020-09-17 02:33:43,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-17 02:33:43,013 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-17 02:33:43,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:33:43,014 INFO L225 Difference]: With dead ends: 79 [2020-09-17 02:33:43,014 INFO L226 Difference]: Without dead ends: 73 [2020-09-17 02:33:43,015 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2020-09-17 02:33:43,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-17 02:33:43,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 50. [2020-09-17 02:33:43,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-17 02:33:43,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-09-17 02:33:43,019 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 15 [2020-09-17 02:33:43,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:33:43,019 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-09-17 02:33:43,019 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-17 02:33:43,019 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-09-17 02:33:43,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-17 02:33:43,020 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:33:43,020 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:33:43,232 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-09-17 02:33:43,232 INFO L427 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:33:43,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:33:43,233 INFO L82 PathProgramCache]: Analyzing trace with hash -135295591, now seen corresponding path program 33 times [2020-09-17 02:33:43,233 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:33:43,234 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36275665] [2020-09-17 02:33:43,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:33:43,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:43,410 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:43,410 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36275665] [2020-09-17 02:33:43,411 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125987023] [2020-09-17 02:33:43,411 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 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 [2020-09-17 02:33:43,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-17 02:33:43,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:33:43,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:33:43,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:33:43,531 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:43,531 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:33:43,532 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-17 02:33:43,533 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657372370] [2020-09-17 02:33:43,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-17 02:33:43,534 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:33:43,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-17 02:33:43,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-09-17 02:33:43,535 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 11 states. [2020-09-17 02:33:43,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:33:43,929 INFO L93 Difference]: Finished difference Result 79 states and 183 transitions. [2020-09-17 02:33:43,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-17 02:33:43,930 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-09-17 02:33:43,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:33:43,931 INFO L225 Difference]: With dead ends: 79 [2020-09-17 02:33:43,932 INFO L226 Difference]: Without dead ends: 73 [2020-09-17 02:33:43,933 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:33:43,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-17 02:33:43,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 53. [2020-09-17 02:33:43,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-09-17 02:33:43,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 131 transitions. [2020-09-17 02:33:43,937 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 131 transitions. Word has length 15 [2020-09-17 02:33:43,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:33:43,938 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 131 transitions. [2020-09-17 02:33:43,938 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-17 02:33:43,938 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 131 transitions. [2020-09-17 02:33:43,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-17 02:33:43,939 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:33:43,939 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:33:44,154 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:33:44,154 INFO L427 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:33:44,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:33:44,155 INFO L82 PathProgramCache]: Analyzing trace with hash -119208451, now seen corresponding path program 34 times [2020-09-17 02:33:44,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:33:44,155 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296172791] [2020-09-17 02:33:44,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:33:44,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:44,270 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:44,270 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296172791] [2020-09-17 02:33:44,270 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040376775] [2020-09-17 02:33:44,270 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 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 [2020-09-17 02:33:44,323 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:33:44,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:33:44,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:33:44,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:33:44,351 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:33:44,363 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:44,363 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:33:44,363 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-17 02:33:44,363 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393643505] [2020-09-17 02:33:44,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-17 02:33:44,364 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:33:44,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-17 02:33:44,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-09-17 02:33:44,364 INFO L87 Difference]: Start difference. First operand 53 states and 131 transitions. Second operand 12 states. [2020-09-17 02:33:44,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:33:44,783 INFO L93 Difference]: Finished difference Result 76 states and 177 transitions. [2020-09-17 02:33:44,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-17 02:33:44,783 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-17 02:33:44,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:33:44,784 INFO L225 Difference]: With dead ends: 76 [2020-09-17 02:33:44,784 INFO L226 Difference]: Without dead ends: 70 [2020-09-17 02:33:44,784 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=178, Invalid=422, Unknown=0, NotChecked=0, Total=600 [2020-09-17 02:33:44,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-09-17 02:33:44,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 52. [2020-09-17 02:33:44,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-17 02:33:44,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-09-17 02:33:44,787 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 15 [2020-09-17 02:33:44,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:33:44,787 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-09-17 02:33:44,787 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-17 02:33:44,788 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-09-17 02:33:44,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-17 02:33:44,788 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:33:44,788 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:33:44,992 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-09-17 02:33:44,992 INFO L427 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:33:44,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:33:44,993 INFO L82 PathProgramCache]: Analyzing trace with hash -118718341, now seen corresponding path program 35 times [2020-09-17 02:33:44,993 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:33:44,994 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527481908] [2020-09-17 02:33:44,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:33:45,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:45,136 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:45,136 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527481908] [2020-09-17 02:33:45,136 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272007056] [2020-09-17 02:33:45,137 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 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 [2020-09-17 02:33:45,195 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-17 02:33:45,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:33:45,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:33:45,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:33:45,225 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:45,225 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:33:45,225 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-17 02:33:45,226 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410114137] [2020-09-17 02:33:45,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-17 02:33:45,226 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:33:45,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-17 02:33:45,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-09-17 02:33:45,227 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 11 states. [2020-09-17 02:33:45,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:33:45,612 INFO L93 Difference]: Finished difference Result 96 states and 227 transitions. [2020-09-17 02:33:45,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-17 02:33:45,613 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-09-17 02:33:45,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:33:45,614 INFO L225 Difference]: With dead ends: 96 [2020-09-17 02:33:45,614 INFO L226 Difference]: Without dead ends: 90 [2020-09-17 02:33:45,615 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-09-17 02:33:45,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-17 02:33:45,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 58. [2020-09-17 02:33:45,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-17 02:33:45,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 149 transitions. [2020-09-17 02:33:45,619 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 149 transitions. Word has length 15 [2020-09-17 02:33:45,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:33:45,620 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 149 transitions. [2020-09-17 02:33:45,620 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-17 02:33:45,620 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 149 transitions. [2020-09-17 02:33:45,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-17 02:33:45,620 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:33:45,620 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:33:45,821 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-09-17 02:33:45,822 INFO L427 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:33:45,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:33:45,822 INFO L82 PathProgramCache]: Analyzing trace with hash -118701601, now seen corresponding path program 36 times [2020-09-17 02:33:45,823 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:33:45,823 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926398024] [2020-09-17 02:33:45,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:33:45,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:45,928 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:45,929 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926398024] [2020-09-17 02:33:45,929 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43326582] [2020-09-17 02:33:45,929 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 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 [2020-09-17 02:33:45,996 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-17 02:33:45,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:33:45,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:33:45,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:33:46,029 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:33:46,041 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:46,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:33:46,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-17 02:33:46,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895171521] [2020-09-17 02:33:46,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-17 02:33:46,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:33:46,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-17 02:33:46,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-09-17 02:33:46,044 INFO L87 Difference]: Start difference. First operand 58 states and 149 transitions. Second operand 12 states. [2020-09-17 02:33:46,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:33:46,498 INFO L93 Difference]: Finished difference Result 77 states and 183 transitions. [2020-09-17 02:33:46,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-17 02:33:46,498 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-17 02:33:46,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:33:46,500 INFO L225 Difference]: With dead ends: 77 [2020-09-17 02:33:46,500 INFO L226 Difference]: Without dead ends: 69 [2020-09-17 02:33:46,501 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-09-17 02:33:46,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-09-17 02:33:46,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 55. [2020-09-17 02:33:46,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-17 02:33:46,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 137 transitions. [2020-09-17 02:33:46,505 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 137 transitions. Word has length 15 [2020-09-17 02:33:46,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:33:46,506 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 137 transitions. [2020-09-17 02:33:46,506 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-17 02:33:46,506 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 137 transitions. [2020-09-17 02:33:46,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-17 02:33:46,507 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:33:46,507 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:33:46,721 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-09-17 02:33:46,721 INFO L427 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:33:46,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:33:46,722 INFO L82 PathProgramCache]: Analyzing trace with hash -186489920, now seen corresponding path program 37 times [2020-09-17 02:33:46,723 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:33:46,723 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109785856] [2020-09-17 02:33:46,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:33:46,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:46,905 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:46,906 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109785856] [2020-09-17 02:33:46,908 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165008866] [2020-09-17 02:33:46,908 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 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 [2020-09-17 02:33:46,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:46,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-17 02:33:46,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:33:46,992 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:46,992 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:33:46,993 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-17 02:33:46,993 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296460367] [2020-09-17 02:33:46,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-17 02:33:46,994 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:33:46,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-17 02:33:46,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-09-17 02:33:46,995 INFO L87 Difference]: Start difference. First operand 55 states and 137 transitions. Second operand 12 states. [2020-09-17 02:33:47,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:33:47,249 INFO L93 Difference]: Finished difference Result 84 states and 195 transitions. [2020-09-17 02:33:47,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-17 02:33:47,250 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-09-17 02:33:47,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:33:47,251 INFO L225 Difference]: With dead ends: 84 [2020-09-17 02:33:47,251 INFO L226 Difference]: Without dead ends: 78 [2020-09-17 02:33:47,251 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-09-17 02:33:47,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-17 02:33:47,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 57. [2020-09-17 02:33:47,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-17 02:33:47,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-09-17 02:33:47,255 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-09-17 02:33:47,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:33:47,255 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-09-17 02:33:47,255 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-17 02:33:47,255 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-09-17 02:33:47,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-17 02:33:47,256 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:33:47,256 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:33:47,466 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-09-17 02:33:47,466 INFO L427 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:33:47,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:33:47,467 INFO L82 PathProgramCache]: Analyzing trace with hash 333253156, now seen corresponding path program 38 times [2020-09-17 02:33:47,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:33:47,467 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489062876] [2020-09-17 02:33:47,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:33:47,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:47,627 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:47,627 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489062876] [2020-09-17 02:33:47,627 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796973651] [2020-09-17 02:33:47,628 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 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 [2020-09-17 02:33:47,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:33:47,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:33:47,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-17 02:33:47,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:33:47,713 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:33:47,734 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:47,734 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:33:47,735 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-17 02:33:47,735 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298829506] [2020-09-17 02:33:47,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:33:47,735 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:33:47,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:33:47,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:33:47,736 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-09-17 02:33:48,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:33:48,099 INFO L93 Difference]: Finished difference Result 81 states and 189 transitions. [2020-09-17 02:33:48,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-17 02:33:48,100 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-17 02:33:48,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:33:48,101 INFO L225 Difference]: With dead ends: 81 [2020-09-17 02:33:48,101 INFO L226 Difference]: Without dead ends: 75 [2020-09-17 02:33:48,101 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=391, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:33:48,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-17 02:33:48,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 56. [2020-09-17 02:33:48,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-17 02:33:48,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-09-17 02:33:48,105 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-09-17 02:33:48,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:33:48,105 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-09-17 02:33:48,106 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:33:48,106 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-09-17 02:33:48,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-17 02:33:48,106 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:33:48,106 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:33:48,316 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-09-17 02:33:48,317 INFO L427 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:33:48,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:33:48,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1988564386, now seen corresponding path program 39 times [2020-09-17 02:33:48,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:33:48,318 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151276203] [2020-09-17 02:33:48,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:33:48,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:48,437 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:48,437 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151276203] [2020-09-17 02:33:48,437 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94797406] [2020-09-17 02:33:48,438 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 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 [2020-09-17 02:33:48,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-17 02:33:48,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:33:48,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-17 02:33:48,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:33:48,518 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:48,519 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:33:48,519 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-17 02:33:48,519 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697866277] [2020-09-17 02:33:48,520 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-17 02:33:48,520 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:33:48,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-17 02:33:48,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-09-17 02:33:48,520 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-09-17 02:33:48,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:33:48,826 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-09-17 02:33:48,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-17 02:33:48,827 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-09-17 02:33:48,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:33:48,828 INFO L225 Difference]: With dead ends: 78 [2020-09-17 02:33:48,828 INFO L226 Difference]: Without dead ends: 72 [2020-09-17 02:33:48,828 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=146, Invalid=360, Unknown=0, NotChecked=0, Total=506 [2020-09-17 02:33:48,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-17 02:33:48,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 57. [2020-09-17 02:33:48,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-17 02:33:48,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-09-17 02:33:48,831 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-09-17 02:33:48,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:33:48,832 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-09-17 02:33:48,832 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-17 02:33:48,832 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-09-17 02:33:48,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-17 02:33:48,832 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:33:48,832 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:33:49,042 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-09-17 02:33:49,043 INFO L427 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:33:49,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:33:49,043 INFO L82 PathProgramCache]: Analyzing trace with hash 268436742, now seen corresponding path program 40 times [2020-09-17 02:33:49,044 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:33:49,044 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953792675] [2020-09-17 02:33:49,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:33:49,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:49,194 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:49,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953792675] [2020-09-17 02:33:49,195 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024115364] [2020-09-17 02:33:49,195 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 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 [2020-09-17 02:33:49,255 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:33:49,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:33:49,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-17 02:33:49,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:33:49,283 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:33:49,300 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:49,300 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:33:49,300 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-17 02:33:49,301 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132273844] [2020-09-17 02:33:49,301 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:33:49,301 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:33:49,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:33:49,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:33:49,302 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-09-17 02:33:49,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:33:49,760 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-09-17 02:33:49,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-17 02:33:49,761 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-17 02:33:49,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:33:49,762 INFO L225 Difference]: With dead ends: 77 [2020-09-17 02:33:49,762 INFO L226 Difference]: Without dead ends: 71 [2020-09-17 02:33:49,763 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2020-09-17 02:33:49,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-09-17 02:33:49,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 56. [2020-09-17 02:33:49,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-17 02:33:49,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-09-17 02:33:49,766 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-09-17 02:33:49,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:33:49,766 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-09-17 02:33:49,766 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:33:49,767 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-09-17 02:33:49,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-17 02:33:49,767 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:33:49,767 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:33:49,970 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-09-17 02:33:49,971 INFO L427 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:33:49,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:33:49,971 INFO L82 PathProgramCache]: Analyzing trace with hash 739432452, now seen corresponding path program 41 times [2020-09-17 02:33:49,972 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:33:49,972 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411314192] [2020-09-17 02:33:49,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:33:49,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:50,110 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:50,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411314192] [2020-09-17 02:33:50,111 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650602870] [2020-09-17 02:33:50,111 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 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 [2020-09-17 02:33:50,171 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-17 02:33:50,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:33:50,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-17 02:33:50,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:33:50,195 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:50,195 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:33:50,195 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-17 02:33:50,196 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846290688] [2020-09-17 02:33:50,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-17 02:33:50,196 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:33:50,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-17 02:33:50,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-09-17 02:33:50,197 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-09-17 02:33:50,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:33:50,577 INFO L93 Difference]: Finished difference Result 74 states and 175 transitions. [2020-09-17 02:33:50,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-17 02:33:50,578 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-09-17 02:33:50,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:33:50,579 INFO L225 Difference]: With dead ends: 74 [2020-09-17 02:33:50,579 INFO L226 Difference]: Without dead ends: 68 [2020-09-17 02:33:50,580 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2020-09-17 02:33:50,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-17 02:33:50,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 57. [2020-09-17 02:33:50,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-17 02:33:50,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-09-17 02:33:50,583 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-09-17 02:33:50,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:33:50,584 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-09-17 02:33:50,584 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-17 02:33:50,584 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-09-17 02:33:50,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-17 02:33:50,584 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:33:50,584 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:33:50,796 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:33:50,797 INFO L427 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:33:50,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:33:50,797 INFO L82 PathProgramCache]: Analyzing trace with hash 755519592, now seen corresponding path program 42 times [2020-09-17 02:33:50,798 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:33:50,798 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521009720] [2020-09-17 02:33:50,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:33:50,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:50,932 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:50,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521009720] [2020-09-17 02:33:50,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388729458] [2020-09-17 02:33:50,933 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:33:50,985 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-17 02:33:50,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:33:50,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-17 02:33:50,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:33:51,009 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:33:51,031 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:51,032 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:33:51,032 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-17 02:33:51,032 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769687941] [2020-09-17 02:33:51,032 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:33:51,033 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:33:51,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:33:51,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:33:51,033 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-09-17 02:33:51,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:33:51,552 INFO L93 Difference]: Finished difference Result 73 states and 173 transitions. [2020-09-17 02:33:51,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-17 02:33:51,554 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-17 02:33:51,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:33:51,555 INFO L225 Difference]: With dead ends: 73 [2020-09-17 02:33:51,555 INFO L226 Difference]: Without dead ends: 67 [2020-09-17 02:33:51,556 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=225, Invalid=531, Unknown=0, NotChecked=0, Total=756 [2020-09-17 02:33:51,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-09-17 02:33:51,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 56. [2020-09-17 02:33:51,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-17 02:33:51,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-09-17 02:33:51,559 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-09-17 02:33:51,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:33:51,560 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-09-17 02:33:51,560 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:33:51,560 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-09-17 02:33:51,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-17 02:33:51,561 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:33:51,561 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:33:51,761 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-09-17 02:33:51,762 INFO L427 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:33:51,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:33:51,763 INFO L82 PathProgramCache]: Analyzing trace with hash 756009702, now seen corresponding path program 43 times [2020-09-17 02:33:51,763 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:33:51,763 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729130712] [2020-09-17 02:33:51,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:33:51,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:51,882 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:51,882 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729130712] [2020-09-17 02:33:51,883 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83696274] [2020-09-17 02:33:51,883 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:33:51,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:51,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-17 02:33:51,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:33:51,966 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:51,967 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:33:51,967 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-17 02:33:51,967 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332513369] [2020-09-17 02:33:51,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-17 02:33:51,968 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:33:51,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-17 02:33:51,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-09-17 02:33:51,968 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-09-17 02:33:52,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:33:52,393 INFO L93 Difference]: Finished difference Result 89 states and 213 transitions. [2020-09-17 02:33:52,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-17 02:33:52,394 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-09-17 02:33:52,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:33:52,395 INFO L225 Difference]: With dead ends: 89 [2020-09-17 02:33:52,396 INFO L226 Difference]: Without dead ends: 83 [2020-09-17 02:33:52,396 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=228, Invalid=474, Unknown=0, NotChecked=0, Total=702 [2020-09-17 02:33:52,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-17 02:33:52,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 60. [2020-09-17 02:33:52,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-17 02:33:52,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 153 transitions. [2020-09-17 02:33:52,400 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 153 transitions. Word has length 16 [2020-09-17 02:33:52,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:33:52,400 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 153 transitions. [2020-09-17 02:33:52,400 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-17 02:33:52,400 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 153 transitions. [2020-09-17 02:33:52,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-17 02:33:52,401 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:33:52,401 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:33:52,611 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:33:52,611 INFO L427 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:33:52,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:33:52,612 INFO L82 PathProgramCache]: Analyzing trace with hash 756026442, now seen corresponding path program 44 times [2020-09-17 02:33:52,613 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:33:52,613 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345311509] [2020-09-17 02:33:52,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:33:52,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:52,726 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:52,727 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345311509] [2020-09-17 02:33:52,727 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164820963] [2020-09-17 02:33:52,727 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:33:52,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:33:52,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:33:52,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-17 02:33:52,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:33:52,811 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:33:52,824 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:52,824 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:33:52,824 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-17 02:33:52,825 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354103287] [2020-09-17 02:33:52,825 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:33:52,825 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:33:52,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:33:52,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:33:52,826 INFO L87 Difference]: Start difference. First operand 60 states and 153 transitions. Second operand 13 states. [2020-09-17 02:33:53,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:33:53,382 INFO L93 Difference]: Finished difference Result 70 states and 169 transitions. [2020-09-17 02:33:53,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-17 02:33:53,383 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-17 02:33:53,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:33:53,384 INFO L225 Difference]: With dead ends: 70 [2020-09-17 02:33:53,384 INFO L226 Difference]: Without dead ends: 62 [2020-09-17 02:33:53,386 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=281, Invalid=589, Unknown=0, NotChecked=0, Total=870 [2020-09-17 02:33:53,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-09-17 02:33:53,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 45. [2020-09-17 02:33:53,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-17 02:33:53,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 108 transitions. [2020-09-17 02:33:53,390 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 108 transitions. Word has length 16 [2020-09-17 02:33:53,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:33:53,390 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 108 transitions. [2020-09-17 02:33:53,391 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:33:53,391 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 108 transitions. [2020-09-17 02:33:53,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-17 02:33:53,391 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:33:53,391 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:33:53,601 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-09-17 02:33:53,601 INFO L427 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:33:53,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:33:53,602 INFO L82 PathProgramCache]: Analyzing trace with hash 615233972, now seen corresponding path program 45 times [2020-09-17 02:33:53,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:33:53,602 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547556016] [2020-09-17 02:33:53,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:33:53,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:53,742 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:53,743 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547556016] [2020-09-17 02:33:53,743 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435887422] [2020-09-17 02:33:53,743 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:33:53,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-17 02:33:53,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:33:53,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-17 02:33:53,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:33:53,864 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:33:53,881 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:53,882 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:33:53,882 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-17 02:33:53,883 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280638642] [2020-09-17 02:33:53,883 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:33:53,883 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:33:53,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:33:53,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:33:53,884 INFO L87 Difference]: Start difference. First operand 45 states and 108 transitions. Second operand 13 states. [2020-09-17 02:33:54,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:33:54,435 INFO L93 Difference]: Finished difference Result 76 states and 183 transitions. [2020-09-17 02:33:54,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-17 02:33:54,436 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-17 02:33:54,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:33:54,437 INFO L225 Difference]: With dead ends: 76 [2020-09-17 02:33:54,437 INFO L226 Difference]: Without dead ends: 71 [2020-09-17 02:33:54,438 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=298, Invalid=572, Unknown=0, NotChecked=0, Total=870 [2020-09-17 02:33:54,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-09-17 02:33:54,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 58. [2020-09-17 02:33:54,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-17 02:33:54,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-09-17 02:33:54,441 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 16 [2020-09-17 02:33:54,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:33:54,441 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-09-17 02:33:54,442 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:33:54,442 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-09-17 02:33:54,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-17 02:33:54,442 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:33:54,442 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:33:54,654 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:33:54,654 INFO L427 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:33:54,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:33:54,655 INFO L82 PathProgramCache]: Analyzing trace with hash 1961999529, now seen corresponding path program 46 times [2020-09-17 02:33:54,655 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:33:54,656 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162423754] [2020-09-17 02:33:54,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:33:54,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:54,783 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:54,784 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162423754] [2020-09-17 02:33:54,784 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546718887] [2020-09-17 02:33:54,784 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:33:54,849 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:33:54,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:33:54,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-17 02:33:54,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:33:54,877 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:33:54,893 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:54,894 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:33:54,894 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-17 02:33:54,895 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432721441] [2020-09-17 02:33:54,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-17 02:33:54,895 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:33:54,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-17 02:33:54,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-09-17 02:33:54,896 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 14 states. [2020-09-17 02:33:55,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:33:55,453 INFO L93 Difference]: Finished difference Result 66 states and 165 transitions. [2020-09-17 02:33:55,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-17 02:33:55,454 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-17 02:33:55,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:33:55,455 INFO L225 Difference]: With dead ends: 66 [2020-09-17 02:33:55,455 INFO L226 Difference]: Without dead ends: 61 [2020-09-17 02:33:55,456 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=311, Invalid=619, Unknown=0, NotChecked=0, Total=930 [2020-09-17 02:33:55,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-17 02:33:55,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 46. [2020-09-17 02:33:55,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-17 02:33:55,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 112 transitions. [2020-09-17 02:33:55,459 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 112 transitions. Word has length 17 [2020-09-17 02:33:55,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:33:55,459 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 112 transitions. [2020-09-17 02:33:55,459 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-17 02:33:55,460 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 112 transitions. [2020-09-17 02:33:55,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-17 02:33:55,460 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:33:55,460 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:33:55,669 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-09-17 02:33:55,670 INFO L427 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:33:55,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:33:55,670 INFO L82 PathProgramCache]: Analyzing trace with hash -1923197356, now seen corresponding path program 47 times [2020-09-17 02:33:55,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:33:55,671 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766401261] [2020-09-17 02:33:55,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:33:55,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:55,839 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:55,839 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766401261] [2020-09-17 02:33:55,839 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736916190] [2020-09-17 02:33:55,840 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:33:55,901 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-09-17 02:33:55,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:33:55,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-17 02:33:55,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:33:55,917 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:55,918 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:33:55,918 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-17 02:33:55,918 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831332470] [2020-09-17 02:33:55,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:33:55,918 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:33:55,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:33:55,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:33:55,919 INFO L87 Difference]: Start difference. First operand 46 states and 112 transitions. Second operand 13 states. [2020-09-17 02:33:56,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:33:56,182 INFO L93 Difference]: Finished difference Result 72 states and 167 transitions. [2020-09-17 02:33:56,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-17 02:33:56,183 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-17 02:33:56,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:33:56,183 INFO L225 Difference]: With dead ends: 72 [2020-09-17 02:33:56,183 INFO L226 Difference]: Without dead ends: 66 [2020-09-17 02:33:56,184 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=309, Unknown=0, NotChecked=0, Total=462 [2020-09-17 02:33:56,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-09-17 02:33:56,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2020-09-17 02:33:56,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-17 02:33:56,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 131 transitions. [2020-09-17 02:33:56,188 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 131 transitions. Word has length 17 [2020-09-17 02:33:56,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:33:56,188 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 131 transitions. [2020-09-17 02:33:56,188 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:33:56,188 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 131 transitions. [2020-09-17 02:33:56,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-17 02:33:56,189 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:33:56,189 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:33:56,400 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-09-17 02:33:56,401 INFO L427 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:33:56,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:33:56,401 INFO L82 PathProgramCache]: Analyzing trace with hash -666307656, now seen corresponding path program 48 times [2020-09-17 02:33:56,402 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:33:56,402 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890645624] [2020-09-17 02:33:56,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:33:56,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:56,589 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:56,589 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890645624] [2020-09-17 02:33:56,589 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310650731] [2020-09-17 02:33:56,590 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:33:56,653 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-09-17 02:33:56,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:33:56,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-17 02:33:56,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:33:56,676 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:33:56,691 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:56,692 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:33:56,692 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-17 02:33:56,692 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95134559] [2020-09-17 02:33:56,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-17 02:33:56,693 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:33:56,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-17 02:33:56,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-09-17 02:33:56,693 INFO L87 Difference]: Start difference. First operand 54 states and 131 transitions. Second operand 14 states. [2020-09-17 02:33:57,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:33:57,002 INFO L93 Difference]: Finished difference Result 82 states and 187 transitions. [2020-09-17 02:33:57,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-17 02:33:57,003 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-17 02:33:57,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:33:57,003 INFO L225 Difference]: With dead ends: 82 [2020-09-17 02:33:57,004 INFO L226 Difference]: Without dead ends: 76 [2020-09-17 02:33:57,004 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:33:57,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-09-17 02:33:57,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 52. [2020-09-17 02:33:57,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-17 02:33:57,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 127 transitions. [2020-09-17 02:33:57,007 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 127 transitions. Word has length 17 [2020-09-17 02:33:57,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:33:57,007 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 127 transitions. [2020-09-17 02:33:57,007 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-17 02:33:57,007 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 127 transitions. [2020-09-17 02:33:57,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-17 02:33:57,008 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:33:57,008 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:33:57,217 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-09-17 02:33:57,218 INFO L427 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:33:57,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:33:57,219 INFO L82 PathProgramCache]: Analyzing trace with hash 949884854, now seen corresponding path program 49 times [2020-09-17 02:33:57,219 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:33:57,219 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515814863] [2020-09-17 02:33:57,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:33:57,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:57,371 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:57,371 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515814863] [2020-09-17 02:33:57,372 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928005609] [2020-09-17 02:33:57,372 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:33:57,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:57,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-17 02:33:57,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:33:57,447 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:57,447 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:33:57,448 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-17 02:33:57,448 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693511623] [2020-09-17 02:33:57,448 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:33:57,448 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:33:57,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:33:57,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:33:57,449 INFO L87 Difference]: Start difference. First operand 52 states and 127 transitions. Second operand 13 states. [2020-09-17 02:33:57,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:33:57,811 INFO L93 Difference]: Finished difference Result 83 states and 191 transitions. [2020-09-17 02:33:57,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-17 02:33:57,812 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-17 02:33:57,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:33:57,814 INFO L225 Difference]: With dead ends: 83 [2020-09-17 02:33:57,814 INFO L226 Difference]: Without dead ends: 77 [2020-09-17 02:33:57,815 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2020-09-17 02:33:57,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-17 02:33:57,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 55. [2020-09-17 02:33:57,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-17 02:33:57,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 135 transitions. [2020-09-17 02:33:57,819 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 135 transitions. Word has length 17 [2020-09-17 02:33:57,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:33:57,819 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 135 transitions. [2020-09-17 02:33:57,820 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:33:57,820 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 135 transitions. [2020-09-17 02:33:57,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-17 02:33:57,820 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:33:57,821 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:33:58,027 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2020-09-17 02:33:58,028 INFO L427 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:33:58,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:33:58,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1469627930, now seen corresponding path program 50 times [2020-09-17 02:33:58,029 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:33:58,030 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654044984] [2020-09-17 02:33:58,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:33:58,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:58,199 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:58,199 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654044984] [2020-09-17 02:33:58,200 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218684683] [2020-09-17 02:33:58,200 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:33:58,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:33:58,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:33:58,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-17 02:33:58,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:33:58,293 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:33:58,310 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:58,311 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:33:58,311 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-17 02:33:58,311 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240432279] [2020-09-17 02:33:58,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-17 02:33:58,312 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:33:58,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-17 02:33:58,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-09-17 02:33:58,313 INFO L87 Difference]: Start difference. First operand 55 states and 135 transitions. Second operand 14 states. [2020-09-17 02:33:58,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:33:58,741 INFO L93 Difference]: Finished difference Result 89 states and 203 transitions. [2020-09-17 02:33:58,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-17 02:33:58,743 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-17 02:33:58,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:33:58,744 INFO L225 Difference]: With dead ends: 89 [2020-09-17 02:33:58,744 INFO L226 Difference]: Without dead ends: 83 [2020-09-17 02:33:58,745 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=196, Invalid=506, Unknown=0, NotChecked=0, Total=702 [2020-09-17 02:33:58,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-17 02:33:58,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 54. [2020-09-17 02:33:58,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-17 02:33:58,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 133 transitions. [2020-09-17 02:33:58,749 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 133 transitions. Word has length 17 [2020-09-17 02:33:58,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:33:58,749 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 133 transitions. [2020-09-17 02:33:58,749 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-17 02:33:58,749 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 133 transitions. [2020-09-17 02:33:58,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-17 02:33:58,750 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:33:58,750 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:33:58,952 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:33:58,953 INFO L427 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:33:58,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:33:58,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1170028136, now seen corresponding path program 51 times [2020-09-17 02:33:58,954 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:33:58,954 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242484305] [2020-09-17 02:33:58,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:33:58,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:59,137 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:59,137 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242484305] [2020-09-17 02:33:59,138 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797787482] [2020-09-17 02:33:59,138 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:33:59,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-09-17 02:33:59,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:33:59,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-17 02:33:59,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:33:59,248 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:59,249 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:33:59,249 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-17 02:33:59,249 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759838027] [2020-09-17 02:33:59,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:33:59,250 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:33:59,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:33:59,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:33:59,251 INFO L87 Difference]: Start difference. First operand 54 states and 133 transitions. Second operand 13 states. [2020-09-17 02:33:59,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:33:59,705 INFO L93 Difference]: Finished difference Result 89 states and 205 transitions. [2020-09-17 02:33:59,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-17 02:33:59,705 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-17 02:33:59,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:33:59,706 INFO L225 Difference]: With dead ends: 89 [2020-09-17 02:33:59,706 INFO L226 Difference]: Without dead ends: 83 [2020-09-17 02:33:59,707 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-09-17 02:33:59,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-17 02:33:59,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 57. [2020-09-17 02:33:59,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-17 02:33:59,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-09-17 02:33:59,709 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 17 [2020-09-17 02:33:59,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:33:59,710 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-09-17 02:33:59,710 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:33:59,710 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-09-17 02:33:59,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-17 02:33:59,711 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:33:59,711 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:33:59,921 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:33:59,921 INFO L427 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:33:59,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:33:59,922 INFO L82 PathProgramCache]: Analyzing trace with hash 1404811516, now seen corresponding path program 52 times [2020-09-17 02:33:59,922 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:33:59,922 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334175319] [2020-09-17 02:33:59,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:33:59,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:34:00,080 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:00,081 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334175319] [2020-09-17 02:34:00,081 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865431118] [2020-09-17 02:34:00,082 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:34:00,139 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:34:00,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:34:00,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-17 02:34:00,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:34:00,171 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:34:00,187 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:00,188 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:34:00,188 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-17 02:34:00,189 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960505284] [2020-09-17 02:34:00,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-17 02:34:00,189 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:34:00,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-17 02:34:00,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-09-17 02:34:00,190 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 14 states. [2020-09-17 02:34:00,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:34:00,692 INFO L93 Difference]: Finished difference Result 86 states and 199 transitions. [2020-09-17 02:34:00,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-17 02:34:00,693 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-17 02:34:00,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:34:00,694 INFO L225 Difference]: With dead ends: 86 [2020-09-17 02:34:00,694 INFO L226 Difference]: Without dead ends: 80 [2020-09-17 02:34:00,695 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=227, Invalid=585, Unknown=0, NotChecked=0, Total=812 [2020-09-17 02:34:00,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-17 02:34:00,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 56. [2020-09-17 02:34:00,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-17 02:34:00,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-09-17 02:34:00,697 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 17 [2020-09-17 02:34:00,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:34:00,698 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-09-17 02:34:00,698 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-17 02:34:00,698 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-09-17 02:34:00,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-17 02:34:00,698 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:34:00,698 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:34:00,899 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-09-17 02:34:00,900 INFO L427 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:34:00,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:34:00,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1875807226, now seen corresponding path program 53 times [2020-09-17 02:34:00,901 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:34:00,901 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281346559] [2020-09-17 02:34:00,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:34:00,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:34:01,039 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:01,039 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281346559] [2020-09-17 02:34:01,039 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888377012] [2020-09-17 02:34:01,039 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:34:01,103 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-09-17 02:34:01,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:34:01,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-17 02:34:01,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:34:01,129 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:01,132 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:34:01,132 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-17 02:34:01,132 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541187362] [2020-09-17 02:34:01,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:34:01,135 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:34:01,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:34:01,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:34:01,136 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 13 states. [2020-09-17 02:34:01,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:34:01,622 INFO L93 Difference]: Finished difference Result 87 states and 203 transitions. [2020-09-17 02:34:01,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-17 02:34:01,623 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-17 02:34:01,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:34:01,624 INFO L225 Difference]: With dead ends: 87 [2020-09-17 02:34:01,624 INFO L226 Difference]: Without dead ends: 81 [2020-09-17 02:34:01,625 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=264, Invalid=606, Unknown=0, NotChecked=0, Total=870 [2020-09-17 02:34:01,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-09-17 02:34:01,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 59. [2020-09-17 02:34:01,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-09-17 02:34:01,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 147 transitions. [2020-09-17 02:34:01,630 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 147 transitions. Word has length 17 [2020-09-17 02:34:01,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:34:01,630 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 147 transitions. [2020-09-17 02:34:01,631 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:34:01,631 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 147 transitions. [2020-09-17 02:34:01,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-17 02:34:01,631 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:34:01,631 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:34:01,841 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:34:01,842 INFO L427 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:34:01,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:34:01,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1891894366, now seen corresponding path program 54 times [2020-09-17 02:34:01,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:34:01,843 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971287308] [2020-09-17 02:34:01,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:34:01,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:34:01,970 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:01,971 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971287308] [2020-09-17 02:34:01,971 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133937572] [2020-09-17 02:34:01,971 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:34:02,041 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-09-17 02:34:02,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:34:02,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-17 02:34:02,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:34:02,076 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:34:02,099 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:02,100 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:34:02,100 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-17 02:34:02,100 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979183045] [2020-09-17 02:34:02,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-17 02:34:02,101 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:34:02,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-17 02:34:02,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-09-17 02:34:02,102 INFO L87 Difference]: Start difference. First operand 59 states and 147 transitions. Second operand 14 states. [2020-09-17 02:34:02,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:34:02,720 INFO L93 Difference]: Finished difference Result 84 states and 197 transitions. [2020-09-17 02:34:02,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-17 02:34:02,721 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-17 02:34:02,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:34:02,722 INFO L225 Difference]: With dead ends: 84 [2020-09-17 02:34:02,722 INFO L226 Difference]: Without dead ends: 78 [2020-09-17 02:34:02,723 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=274, Invalid=656, Unknown=0, NotChecked=0, Total=930 [2020-09-17 02:34:02,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-17 02:34:02,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 58. [2020-09-17 02:34:02,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-17 02:34:02,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-09-17 02:34:02,726 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 17 [2020-09-17 02:34:02,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:34:02,727 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-09-17 02:34:02,727 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-17 02:34:02,727 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-09-17 02:34:02,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-17 02:34:02,727 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:34:02,727 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:34:02,928 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-09-17 02:34:02,928 INFO L427 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:34:02,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:34:02,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1892384476, now seen corresponding path program 55 times [2020-09-17 02:34:02,929 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:34:02,930 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725179853] [2020-09-17 02:34:02,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:34:02,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:34:03,078 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:03,079 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725179853] [2020-09-17 02:34:03,079 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45103820] [2020-09-17 02:34:03,079 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:34:03,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:34:03,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-17 02:34:03,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:34:03,163 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:03,164 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:34:03,164 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-17 02:34:03,164 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205992655] [2020-09-17 02:34:03,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:34:03,165 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:34:03,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:34:03,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:34:03,166 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 13 states. [2020-09-17 02:34:03,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:34:03,716 INFO L93 Difference]: Finished difference Result 104 states and 247 transitions. [2020-09-17 02:34:03,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-17 02:34:03,717 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-17 02:34:03,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:34:03,718 INFO L225 Difference]: With dead ends: 104 [2020-09-17 02:34:03,719 INFO L226 Difference]: Without dead ends: 98 [2020-09-17 02:34:03,719 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=326, Invalid=666, Unknown=0, NotChecked=0, Total=992 [2020-09-17 02:34:03,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-17 02:34:03,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 64. [2020-09-17 02:34:03,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-17 02:34:03,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 165 transitions. [2020-09-17 02:34:03,723 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 165 transitions. Word has length 17 [2020-09-17 02:34:03,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:34:03,723 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 165 transitions. [2020-09-17 02:34:03,723 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:34:03,723 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 165 transitions. [2020-09-17 02:34:03,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-17 02:34:03,724 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:34:03,724 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:34:03,934 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-09-17 02:34:03,935 INFO L427 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:34:03,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:34:03,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1892401216, now seen corresponding path program 56 times [2020-09-17 02:34:03,936 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:34:03,936 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733829380] [2020-09-17 02:34:03,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:34:03,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:34:04,065 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:04,066 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733829380] [2020-09-17 02:34:04,066 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394235558] [2020-09-17 02:34:04,066 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:34:04,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:34:04,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:34:04,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-17 02:34:04,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:34:04,161 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:34:04,176 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:04,177 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:34:04,177 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-17 02:34:04,177 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250033615] [2020-09-17 02:34:04,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-17 02:34:04,178 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:34:04,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-17 02:34:04,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-09-17 02:34:04,179 INFO L87 Difference]: Start difference. First operand 64 states and 165 transitions. Second operand 14 states. [2020-09-17 02:34:04,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:34:04,866 INFO L93 Difference]: Finished difference Result 85 states and 203 transitions. [2020-09-17 02:34:04,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-17 02:34:04,867 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-17 02:34:04,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:34:04,869 INFO L225 Difference]: With dead ends: 85 [2020-09-17 02:34:04,869 INFO L226 Difference]: Without dead ends: 77 [2020-09-17 02:34:04,869 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=337, Invalid=719, Unknown=0, NotChecked=0, Total=1056 [2020-09-17 02:34:04,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-17 02:34:04,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 61. [2020-09-17 02:34:04,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-09-17 02:34:04,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-09-17 02:34:04,873 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 17 [2020-09-17 02:34:04,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:34:04,874 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-09-17 02:34:04,874 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-17 02:34:04,874 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-09-17 02:34:04,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-17 02:34:04,874 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:34:04,875 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:34:05,077 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-09-17 02:34:05,078 INFO L427 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:34:05,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:34:05,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1171829247, now seen corresponding path program 57 times [2020-09-17 02:34:05,079 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:34:05,080 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050394476] [2020-09-17 02:34:05,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:34:05,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:34:05,276 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:05,277 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050394476] [2020-09-17 02:34:05,277 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890081962] [2020-09-17 02:34:05,278 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:34:05,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-09-17 02:34:05,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:34:05,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-17 02:34:05,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:34:05,362 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:05,362 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:34:05,363 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-17 02:34:05,363 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914179917] [2020-09-17 02:34:05,363 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-17 02:34:05,364 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:34:05,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-17 02:34:05,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-09-17 02:34:05,364 INFO L87 Difference]: Start difference. First operand 61 states and 153 transitions. Second operand 14 states. [2020-09-17 02:34:05,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:34:05,717 INFO L93 Difference]: Finished difference Result 94 states and 219 transitions. [2020-09-17 02:34:05,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-17 02:34:05,718 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-09-17 02:34:05,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:34:05,719 INFO L225 Difference]: With dead ends: 94 [2020-09-17 02:34:05,719 INFO L226 Difference]: Without dead ends: 88 [2020-09-17 02:34:05,720 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=183, Invalid=417, Unknown=0, NotChecked=0, Total=600 [2020-09-17 02:34:05,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-09-17 02:34:05,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 63. [2020-09-17 02:34:05,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-17 02:34:05,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-09-17 02:34:05,723 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-09-17 02:34:05,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:34:05,723 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-09-17 02:34:05,723 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-17 02:34:05,723 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-09-17 02:34:05,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-17 02:34:05,724 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:34:05,724 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:34:05,933 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-09-17 02:34:05,934 INFO L427 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:34:05,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:34:05,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1866248349, now seen corresponding path program 58 times [2020-09-17 02:34:05,935 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:34:05,935 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875760757] [2020-09-17 02:34:05,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:34:05,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:34:06,148 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:06,148 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875760757] [2020-09-17 02:34:06,149 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755806891] [2020-09-17 02:34:06,149 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:34:06,212 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:34:06,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:34:06,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-17 02:34:06,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:34:06,240 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:34:06,263 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:06,264 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:34:06,264 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-17 02:34:06,264 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283616612] [2020-09-17 02:34:06,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:34:06,265 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:34:06,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:34:06,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:34:06,265 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-09-17 02:34:06,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:34:06,707 INFO L93 Difference]: Finished difference Result 91 states and 213 transitions. [2020-09-17 02:34:06,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-17 02:34:06,708 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-17 02:34:06,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:34:06,709 INFO L225 Difference]: With dead ends: 91 [2020-09-17 02:34:06,709 INFO L226 Difference]: Without dead ends: 85 [2020-09-17 02:34:06,710 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-09-17 02:34:06,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-17 02:34:06,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62. [2020-09-17 02:34:06,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-17 02:34:06,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-09-17 02:34:06,713 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-09-17 02:34:06,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:34:06,713 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-09-17 02:34:06,714 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:34:06,714 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-09-17 02:34:06,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-17 02:34:06,714 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:34:06,715 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:34:06,925 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-09-17 02:34:06,925 INFO L427 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:34:06,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:34:06,926 INFO L82 PathProgramCache]: Analyzing trace with hash -250055839, now seen corresponding path program 59 times [2020-09-17 02:34:06,926 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:34:06,927 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353459527] [2020-09-17 02:34:06,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:34:06,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:34:07,135 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:07,135 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353459527] [2020-09-17 02:34:07,136 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059865445] [2020-09-17 02:34:07,136 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:34:07,197 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-09-17 02:34:07,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:34:07,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-17 02:34:07,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:34:07,216 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:07,220 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:34:07,220 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-17 02:34:07,220 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123048942] [2020-09-17 02:34:07,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-17 02:34:07,221 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:34:07,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-17 02:34:07,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-09-17 02:34:07,221 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-09-17 02:34:07,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:34:07,603 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-09-17 02:34:07,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-17 02:34:07,604 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-09-17 02:34:07,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:34:07,605 INFO L225 Difference]: With dead ends: 88 [2020-09-17 02:34:07,605 INFO L226 Difference]: Without dead ends: 82 [2020-09-17 02:34:07,606 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=198, Invalid=504, Unknown=0, NotChecked=0, Total=702 [2020-09-17 02:34:07,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-09-17 02:34:07,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 63. [2020-09-17 02:34:07,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-17 02:34:07,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-09-17 02:34:07,608 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-09-17 02:34:07,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:34:07,609 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-09-17 02:34:07,609 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-17 02:34:07,609 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-09-17 02:34:07,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-17 02:34:07,609 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:34:07,610 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:34:07,820 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:34:07,821 INFO L427 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:34:07,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:34:07,821 INFO L82 PathProgramCache]: Analyzing trace with hash 269687237, now seen corresponding path program 60 times [2020-09-17 02:34:07,821 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:34:07,822 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144296586] [2020-09-17 02:34:07,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:34:07,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:34:08,006 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:08,007 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144296586] [2020-09-17 02:34:08,007 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714156109] [2020-09-17 02:34:08,008 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:34:08,069 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-09-17 02:34:08,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:34:08,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-17 02:34:08,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:34:08,104 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:34:08,121 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:08,122 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:34:08,122 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-17 02:34:08,123 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478268830] [2020-09-17 02:34:08,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:34:08,123 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:34:08,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:34:08,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:34:08,124 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-09-17 02:34:08,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:34:08,666 INFO L93 Difference]: Finished difference Result 87 states and 205 transitions. [2020-09-17 02:34:08,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-17 02:34:08,667 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-17 02:34:08,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:34:08,668 INFO L225 Difference]: With dead ends: 87 [2020-09-17 02:34:08,668 INFO L226 Difference]: Without dead ends: 81 [2020-09-17 02:34:08,668 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=240, Invalid=630, Unknown=0, NotChecked=0, Total=870 [2020-09-17 02:34:08,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-09-17 02:34:08,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 62. [2020-09-17 02:34:08,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-17 02:34:08,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-09-17 02:34:08,671 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-09-17 02:34:08,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:34:08,671 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-09-17 02:34:08,671 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:34:08,671 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-09-17 02:34:08,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-17 02:34:08,672 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:34:08,672 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:34:08,872 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:34:08,873 INFO L427 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:34:08,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:34:08,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1924998467, now seen corresponding path program 61 times [2020-09-17 02:34:08,874 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:34:08,874 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628069362] [2020-09-17 02:34:08,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:34:08,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:34:09,045 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:09,046 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628069362] [2020-09-17 02:34:09,046 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031789076] [2020-09-17 02:34:09,046 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:34:09,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:34:09,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-17 02:34:09,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:34:09,134 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:09,135 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:34:09,135 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-17 02:34:09,136 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837816923] [2020-09-17 02:34:09,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-17 02:34:09,136 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:34:09,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-17 02:34:09,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-09-17 02:34:09,137 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-09-17 02:34:09,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:34:09,602 INFO L93 Difference]: Finished difference Result 84 states and 199 transitions. [2020-09-17 02:34:09,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-17 02:34:09,603 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-09-17 02:34:09,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:34:09,604 INFO L225 Difference]: With dead ends: 84 [2020-09-17 02:34:09,604 INFO L226 Difference]: Without dead ends: 78 [2020-09-17 02:34:09,605 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=229, Invalid=583, Unknown=0, NotChecked=0, Total=812 [2020-09-17 02:34:09,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-17 02:34:09,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 63. [2020-09-17 02:34:09,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-17 02:34:09,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-09-17 02:34:09,608 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-09-17 02:34:09,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:34:09,609 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-09-17 02:34:09,609 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-17 02:34:09,609 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-09-17 02:34:09,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-17 02:34:09,609 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:34:09,610 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:34:09,815 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2020-09-17 02:34:09,816 INFO L427 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:34:09,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:34:09,816 INFO L82 PathProgramCache]: Analyzing trace with hash 204870823, now seen corresponding path program 62 times [2020-09-17 02:34:09,817 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:34:09,817 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641956263] [2020-09-17 02:34:09,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:34:09,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:34:10,003 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:10,003 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641956263] [2020-09-17 02:34:10,004 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6949183] [2020-09-17 02:34:10,004 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:34:10,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:34:10,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:34:10,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-17 02:34:10,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:34:10,102 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:34:10,121 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:10,121 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:34:10,121 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-17 02:34:10,122 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128496769] [2020-09-17 02:34:10,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:34:10,123 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:34:10,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:34:10,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:34:10,124 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-09-17 02:34:10,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:34:10,773 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-09-17 02:34:10,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-17 02:34:10,774 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-17 02:34:10,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:34:10,775 INFO L225 Difference]: With dead ends: 83 [2020-09-17 02:34:10,775 INFO L226 Difference]: Without dead ends: 77 [2020-09-17 02:34:10,776 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2020-09-17 02:34:10,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-17 02:34:10,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 62. [2020-09-17 02:34:10,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-17 02:34:10,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-09-17 02:34:10,779 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-09-17 02:34:10,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:34:10,779 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-09-17 02:34:10,779 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:34:10,779 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-09-17 02:34:10,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-17 02:34:10,780 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:34:10,780 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:34:10,991 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:34:10,991 INFO L427 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:34:10,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:34:10,992 INFO L82 PathProgramCache]: Analyzing trace with hash 675866533, now seen corresponding path program 63 times [2020-09-17 02:34:10,993 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:34:10,993 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727878179] [2020-09-17 02:34:10,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:34:11,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:34:11,170 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:11,171 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727878179] [2020-09-17 02:34:11,171 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382134048] [2020-09-17 02:34:11,171 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:34:11,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-09-17 02:34:11,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:34:11,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-17 02:34:11,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:34:11,261 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:11,261 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:34:11,261 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-17 02:34:11,262 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139342328] [2020-09-17 02:34:11,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-17 02:34:11,262 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:34:11,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-17 02:34:11,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-09-17 02:34:11,263 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-09-17 02:34:11,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:34:11,788 INFO L93 Difference]: Finished difference Result 80 states and 191 transitions. [2020-09-17 02:34:11,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-17 02:34:11,789 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-09-17 02:34:11,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:34:11,790 INFO L225 Difference]: With dead ends: 80 [2020-09-17 02:34:11,790 INFO L226 Difference]: Without dead ends: 74 [2020-09-17 02:34:11,791 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=276, Invalid=654, Unknown=0, NotChecked=0, Total=930 [2020-09-17 02:34:11,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-09-17 02:34:11,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 63. [2020-09-17 02:34:11,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-17 02:34:11,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-09-17 02:34:11,793 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-09-17 02:34:11,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:34:11,793 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-09-17 02:34:11,793 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-17 02:34:11,794 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-09-17 02:34:11,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-17 02:34:11,794 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:34:11,794 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:34:11,995 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2020-09-17 02:34:11,995 INFO L427 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:34:11,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:34:11,996 INFO L82 PathProgramCache]: Analyzing trace with hash 691953673, now seen corresponding path program 64 times [2020-09-17 02:34:11,996 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:34:11,997 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845862725] [2020-09-17 02:34:11,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:34:12,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:34:12,161 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:12,161 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845862725] [2020-09-17 02:34:12,162 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189986325] [2020-09-17 02:34:12,162 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:34:12,223 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:34:12,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:34:12,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-17 02:34:12,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:34:12,252 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:34:12,267 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:12,268 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:34:12,268 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-17 02:34:12,268 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998138002] [2020-09-17 02:34:12,272 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:34:12,273 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:34:12,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:34:12,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:34:12,273 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-09-17 02:34:13,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:34:13,018 INFO L93 Difference]: Finished difference Result 79 states and 189 transitions. [2020-09-17 02:34:13,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-17 02:34:13,019 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-17 02:34:13,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:34:13,020 INFO L225 Difference]: With dead ends: 79 [2020-09-17 02:34:13,021 INFO L226 Difference]: Without dead ends: 73 [2020-09-17 02:34:13,021 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=332, Invalid=790, Unknown=0, NotChecked=0, Total=1122 [2020-09-17 02:34:13,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-17 02:34:13,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 62. [2020-09-17 02:34:13,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-17 02:34:13,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-09-17 02:34:13,024 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-09-17 02:34:13,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:34:13,024 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-09-17 02:34:13,024 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:34:13,024 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-09-17 02:34:13,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-17 02:34:13,025 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:34:13,025 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:34:13,225 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:34:13,226 INFO L427 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:34:13,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:34:13,227 INFO L82 PathProgramCache]: Analyzing trace with hash 692443783, now seen corresponding path program 65 times [2020-09-17 02:34:13,227 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:34:13,227 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650770458] [2020-09-17 02:34:13,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:34:13,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:34:13,400 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:13,400 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650770458] [2020-09-17 02:34:13,401 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490417037] [2020-09-17 02:34:13,401 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:34:13,465 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-09-17 02:34:13,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:34:13,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-17 02:34:13,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:34:13,492 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:13,493 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:34:13,493 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-17 02:34:13,493 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845981937] [2020-09-17 02:34:13,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-17 02:34:13,494 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:34:13,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-17 02:34:13,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-09-17 02:34:13,495 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-09-17 02:34:14,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:34:14,049 INFO L93 Difference]: Finished difference Result 95 states and 229 transitions. [2020-09-17 02:34:14,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-17 02:34:14,050 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-09-17 02:34:14,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:34:14,051 INFO L225 Difference]: With dead ends: 95 [2020-09-17 02:34:14,051 INFO L226 Difference]: Without dead ends: 89 [2020-09-17 02:34:14,051 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=339, Invalid=717, Unknown=0, NotChecked=0, Total=1056 [2020-09-17 02:34:14,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-09-17 02:34:14,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 66. [2020-09-17 02:34:14,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-17 02:34:14,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 169 transitions. [2020-09-17 02:34:14,055 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 169 transitions. Word has length 18 [2020-09-17 02:34:14,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:34:14,055 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 169 transitions. [2020-09-17 02:34:14,055 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-17 02:34:14,055 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 169 transitions. [2020-09-17 02:34:14,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-17 02:34:14,056 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:34:14,056 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:34:14,265 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-09-17 02:34:14,265 INFO L427 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:34:14,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:34:14,266 INFO L82 PathProgramCache]: Analyzing trace with hash 692460523, now seen corresponding path program 66 times [2020-09-17 02:34:14,266 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:34:14,266 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799125563] [2020-09-17 02:34:14,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:34:14,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:34:14,421 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:14,422 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799125563] [2020-09-17 02:34:14,422 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750230028] [2020-09-17 02:34:14,422 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:34:14,487 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-09-17 02:34:14,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:34:14,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-17 02:34:14,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:34:14,516 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:34:14,532 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:14,533 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:34:14,533 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-17 02:34:14,533 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5255536] [2020-09-17 02:34:14,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:34:14,534 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:34:14,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:34:14,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:34:14,535 INFO L87 Difference]: Start difference. First operand 66 states and 169 transitions. Second operand 15 states. [2020-09-17 02:34:15,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:34:15,338 INFO L93 Difference]: Finished difference Result 76 states and 185 transitions. [2020-09-17 02:34:15,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-17 02:34:15,339 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-17 02:34:15,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:34:15,340 INFO L225 Difference]: With dead ends: 76 [2020-09-17 02:34:15,340 INFO L226 Difference]: Without dead ends: 68 [2020-09-17 02:34:15,341 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=402, Invalid=858, Unknown=0, NotChecked=0, Total=1260 [2020-09-17 02:34:15,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-17 02:34:15,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 49. [2020-09-17 02:34:15,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-09-17 02:34:15,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 118 transitions. [2020-09-17 02:34:15,343 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 118 transitions. Word has length 18 [2020-09-17 02:34:15,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:34:15,343 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 118 transitions. [2020-09-17 02:34:15,343 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:34:15,343 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 118 transitions. [2020-09-17 02:34:15,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-17 02:34:15,344 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:34:15,344 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:34:15,544 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:34:15,545 INFO L427 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:34:15,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:34:15,546 INFO L82 PathProgramCache]: Analyzing trace with hash -1465088141, now seen corresponding path program 67 times [2020-09-17 02:34:15,546 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:34:15,546 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12763656] [2020-09-17 02:34:15,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:34:15,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:34:15,700 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:15,700 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12763656] [2020-09-17 02:34:15,701 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790953807] [2020-09-17 02:34:15,701 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:34:15,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:34:15,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-17 02:34:15,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:34:15,793 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:34:15,810 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:15,811 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:34:15,811 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-17 02:34:15,811 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940897787] [2020-09-17 02:34:15,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:34:15,812 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:34:15,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:34:15,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:34:15,813 INFO L87 Difference]: Start difference. First operand 49 states and 118 transitions. Second operand 15 states. [2020-09-17 02:34:16,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:34:16,492 INFO L93 Difference]: Finished difference Result 84 states and 203 transitions. [2020-09-17 02:34:16,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-17 02:34:16,493 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-17 02:34:16,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:34:16,495 INFO L225 Difference]: With dead ends: 84 [2020-09-17 02:34:16,495 INFO L226 Difference]: Without dead ends: 79 [2020-09-17 02:34:16,495 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=425, Invalid=835, Unknown=0, NotChecked=0, Total=1260 [2020-09-17 02:34:16,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-09-17 02:34:16,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 64. [2020-09-17 02:34:16,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-17 02:34:16,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 161 transitions. [2020-09-17 02:34:16,498 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 161 transitions. Word has length 18 [2020-09-17 02:34:16,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:34:16,498 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 161 transitions. [2020-09-17 02:34:16,498 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:34:16,499 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 161 transitions. [2020-09-17 02:34:16,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-17 02:34:16,499 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:34:16,499 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:34:16,700 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-09-17 02:34:16,700 INFO L427 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:34:16,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:34:16,701 INFO L82 PathProgramCache]: Analyzing trace with hash -8543960, now seen corresponding path program 68 times [2020-09-17 02:34:16,702 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:34:16,702 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051620290] [2020-09-17 02:34:16,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:34:16,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:34:16,888 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:16,889 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051620290] [2020-09-17 02:34:16,889 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953082076] [2020-09-17 02:34:16,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:34:16,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:34:16,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:34:16,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-17 02:34:16,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:34:16,977 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:34:16,995 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:16,996 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:34:16,996 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-17 02:34:16,996 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270433460] [2020-09-17 02:34:16,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-17 02:34:16,997 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:34:16,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-17 02:34:16,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2020-09-17 02:34:16,998 INFO L87 Difference]: Start difference. First operand 64 states and 161 transitions. Second operand 16 states. [2020-09-17 02:34:17,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:34:17,786 INFO L93 Difference]: Finished difference Result 72 states and 181 transitions. [2020-09-17 02:34:17,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-17 02:34:17,786 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-17 02:34:17,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:34:17,787 INFO L225 Difference]: With dead ends: 72 [2020-09-17 02:34:17,788 INFO L226 Difference]: Without dead ends: 67 [2020-09-17 02:34:17,788 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=439, Invalid=893, Unknown=0, NotChecked=0, Total=1332 [2020-09-17 02:34:17,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-09-17 02:34:17,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 50. [2020-09-17 02:34:17,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-17 02:34:17,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 122 transitions. [2020-09-17 02:34:17,791 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 122 transitions. Word has length 19 [2020-09-17 02:34:17,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:34:17,791 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 122 transitions. [2020-09-17 02:34:17,791 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-17 02:34:17,791 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 122 transitions. [2020-09-17 02:34:17,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-17 02:34:17,792 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:34:17,792 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:34:17,994 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-09-17 02:34:17,995 INFO L427 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:34:17,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:34:17,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1356705901, now seen corresponding path program 69 times [2020-09-17 02:34:17,996 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:34:17,996 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892608489] [2020-09-17 02:34:17,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:34:18,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:34:18,228 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:18,228 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892608489] [2020-09-17 02:34:18,228 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340098202] [2020-09-17 02:34:18,229 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:34:18,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-09-17 02:34:18,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:34:18,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-17 02:34:18,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:34:18,310 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:18,311 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:34:18,311 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-17 02:34:18,311 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559967733] [2020-09-17 02:34:18,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:34:18,312 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:34:18,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:34:18,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:34:18,312 INFO L87 Difference]: Start difference. First operand 50 states and 122 transitions. Second operand 15 states. [2020-09-17 02:34:18,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:34:18,675 INFO L93 Difference]: Finished difference Result 78 states and 181 transitions. [2020-09-17 02:34:18,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-17 02:34:18,676 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-09-17 02:34:18,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:34:18,677 INFO L225 Difference]: With dead ends: 78 [2020-09-17 02:34:18,677 INFO L226 Difference]: Without dead ends: 72 [2020-09-17 02:34:18,677 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=213, Invalid=437, Unknown=0, NotChecked=0, Total=650 [2020-09-17 02:34:18,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-17 02:34:18,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 58. [2020-09-17 02:34:18,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-17 02:34:18,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 141 transitions. [2020-09-17 02:34:18,680 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 141 transitions. Word has length 19 [2020-09-17 02:34:18,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:34:18,681 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 141 transitions. [2020-09-17 02:34:18,681 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:34:18,681 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 141 transitions. [2020-09-17 02:34:18,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-17 02:34:18,681 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:34:18,681 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:34:18,882 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:34:18,883 INFO L427 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:34:18,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:34:18,883 INFO L82 PathProgramCache]: Analyzing trace with hash -371514377, now seen corresponding path program 70 times [2020-09-17 02:34:18,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:34:18,884 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783495615] [2020-09-17 02:34:18,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:34:18,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:34:19,130 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:19,131 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783495615] [2020-09-17 02:34:19,131 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315860116] [2020-09-17 02:34:19,132 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:34:19,194 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:34:19,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:34:19,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-17 02:34:19,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:34:19,220 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:34:19,238 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:19,239 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:34:19,239 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-17 02:34:19,239 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633874361] [2020-09-17 02:34:19,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-17 02:34:19,240 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:34:19,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-17 02:34:19,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-09-17 02:34:19,241 INFO L87 Difference]: Start difference. First operand 58 states and 141 transitions. Second operand 16 states. [2020-09-17 02:34:19,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:34:19,669 INFO L93 Difference]: Finished difference Result 90 states and 205 transitions. [2020-09-17 02:34:19,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-17 02:34:19,669 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-17 02:34:19,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:34:19,671 INFO L225 Difference]: With dead ends: 90 [2020-09-17 02:34:19,671 INFO L226 Difference]: Without dead ends: 84 [2020-09-17 02:34:19,671 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=222, Invalid=534, Unknown=0, NotChecked=0, Total=756 [2020-09-17 02:34:19,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-09-17 02:34:19,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 56. [2020-09-17 02:34:19,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-17 02:34:19,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 137 transitions. [2020-09-17 02:34:19,674 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 137 transitions. Word has length 19 [2020-09-17 02:34:19,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:34:19,675 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 137 transitions. [2020-09-17 02:34:19,675 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-17 02:34:19,675 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 137 transitions. [2020-09-17 02:34:19,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-17 02:34:19,676 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:34:19,676 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:34:19,887 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:34:19,888 INFO L427 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:34:19,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:34:19,888 INFO L82 PathProgramCache]: Analyzing trace with hash -1988673419, now seen corresponding path program 71 times [2020-09-17 02:34:19,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:34:19,889 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482374901] [2020-09-17 02:34:19,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:34:19,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:34:20,115 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:20,116 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482374901] [2020-09-17 02:34:20,116 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676027127] [2020-09-17 02:34:20,116 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:34:20,180 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-09-17 02:34:20,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:34:20,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-17 02:34:20,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:34:20,198 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:20,199 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:34:20,199 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-17 02:34:20,200 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165422292] [2020-09-17 02:34:20,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:34:20,200 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:34:20,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:34:20,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:34:20,201 INFO L87 Difference]: Start difference. First operand 56 states and 137 transitions. Second operand 15 states. [2020-09-17 02:34:20,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:34:20,688 INFO L93 Difference]: Finished difference Result 91 states and 209 transitions. [2020-09-17 02:34:20,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-17 02:34:20,689 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-09-17 02:34:20,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:34:20,690 INFO L225 Difference]: With dead ends: 91 [2020-09-17 02:34:20,690 INFO L226 Difference]: Without dead ends: 85 [2020-09-17 02:34:20,690 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=229, Invalid=583, Unknown=0, NotChecked=0, Total=812 [2020-09-17 02:34:20,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-17 02:34:20,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 59. [2020-09-17 02:34:20,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-09-17 02:34:20,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 145 transitions. [2020-09-17 02:34:20,694 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 145 transitions. Word has length 19 [2020-09-17 02:34:20,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:34:20,694 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 145 transitions. [2020-09-17 02:34:20,694 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:34:20,694 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 145 transitions. [2020-09-17 02:34:20,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-17 02:34:20,695 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:34:20,695 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:34:20,904 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:34:20,904 INFO L427 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:34:20,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:34:20,905 INFO L82 PathProgramCache]: Analyzing trace with hash -731783719, now seen corresponding path program 72 times [2020-09-17 02:34:20,906 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:34:20,906 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907089683] [2020-09-17 02:34:20,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:34:20,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:34:21,099 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:21,100 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907089683] [2020-09-17 02:34:21,100 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357966899] [2020-09-17 02:34:21,100 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:34:21,185 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-09-17 02:34:21,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:34:21,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-17 02:34:21,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:34:21,216 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:34:21,234 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:21,235 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:34:21,235 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-17 02:34:21,235 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596909868] [2020-09-17 02:34:21,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-17 02:34:21,236 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:34:21,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-17 02:34:21,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-09-17 02:34:21,237 INFO L87 Difference]: Start difference. First operand 59 states and 145 transitions. Second operand 16 states. [2020-09-17 02:34:21,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:34:21,751 INFO L93 Difference]: Finished difference Result 99 states and 225 transitions. [2020-09-17 02:34:21,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-17 02:34:21,752 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-17 02:34:21,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:34:21,753 INFO L225 Difference]: With dead ends: 99 [2020-09-17 02:34:21,753 INFO L226 Difference]: Without dead ends: 93 [2020-09-17 02:34:21,754 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=257, Invalid=673, Unknown=0, NotChecked=0, Total=930 [2020-09-17 02:34:21,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-17 02:34:21,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 58. [2020-09-17 02:34:21,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-17 02:34:21,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 143 transitions. [2020-09-17 02:34:21,757 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 143 transitions. Word has length 19 [2020-09-17 02:34:21,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:34:21,758 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 143 transitions. [2020-09-17 02:34:21,758 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-17 02:34:21,758 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 143 transitions. [2020-09-17 02:34:21,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-17 02:34:21,758 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:34:21,758 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:34:21,959 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:34:21,959 INFO L427 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:34:21,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:34:21,960 INFO L82 PathProgramCache]: Analyzing trace with hash 884408791, now seen corresponding path program 73 times [2020-09-17 02:34:21,960 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:34:21,961 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278091008] [2020-09-17 02:34:21,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:34:21,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:34:22,173 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:22,174 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278091008] [2020-09-17 02:34:22,175 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24348596] [2020-09-17 02:34:22,175 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:34:22,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:34:22,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-17 02:34:22,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:34:22,269 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:22,270 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:34:22,270 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-17 02:34:22,271 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238735047] [2020-09-17 02:34:22,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:34:22,271 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:34:22,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:34:22,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:34:22,272 INFO L87 Difference]: Start difference. First operand 58 states and 143 transitions. Second operand 15 states. [2020-09-17 02:34:22,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:34:22,803 INFO L93 Difference]: Finished difference Result 99 states and 227 transitions. [2020-09-17 02:34:22,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-17 02:34:22,804 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-09-17 02:34:22,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:34:22,805 INFO L225 Difference]: With dead ends: 99 [2020-09-17 02:34:22,805 INFO L226 Difference]: Without dead ends: 93 [2020-09-17 02:34:22,806 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2020-09-17 02:34:22,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-17 02:34:22,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 61. [2020-09-17 02:34:22,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-09-17 02:34:22,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 151 transitions. [2020-09-17 02:34:22,808 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 151 transitions. Word has length 19 [2020-09-17 02:34:22,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:34:22,808 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 151 transitions. [2020-09-17 02:34:22,808 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:34:22,809 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 151 transitions. [2020-09-17 02:34:22,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-17 02:34:22,809 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:34:22,809 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:34:23,010 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2020-09-17 02:34:23,010 INFO L427 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:34:23,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:34:23,011 INFO L82 PathProgramCache]: Analyzing trace with hash 1404151867, now seen corresponding path program 74 times [2020-09-17 02:34:23,012 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:34:23,012 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717594524] [2020-09-17 02:34:23,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:34:23,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:34:23,242 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:23,242 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717594524] [2020-09-17 02:34:23,243 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91290801] [2020-09-17 02:34:23,243 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:34:23,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:34:23,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:34:23,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-17 02:34:23,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:34:23,333 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:34:23,349 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:23,349 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:34:23,349 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-17 02:34:23,350 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207290570] [2020-09-17 02:34:23,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-17 02:34:23,350 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:34:23,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-17 02:34:23,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-09-17 02:34:23,350 INFO L87 Difference]: Start difference. First operand 61 states and 151 transitions. Second operand 16 states. [2020-09-17 02:34:23,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:34:23,982 INFO L93 Difference]: Finished difference Result 96 states and 221 transitions. [2020-09-17 02:34:23,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-17 02:34:23,983 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-17 02:34:23,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:34:23,985 INFO L225 Difference]: With dead ends: 96 [2020-09-17 02:34:23,985 INFO L226 Difference]: Without dead ends: 90 [2020-09-17 02:34:23,986 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=286, Invalid=770, Unknown=0, NotChecked=0, Total=1056 [2020-09-17 02:34:23,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-17 02:34:23,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 60. [2020-09-17 02:34:23,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-17 02:34:23,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 149 transitions. [2020-09-17 02:34:23,988 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 149 transitions. Word has length 19 [2020-09-17 02:34:23,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:34:23,988 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 149 transitions. [2020-09-17 02:34:23,988 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-17 02:34:23,989 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 149 transitions. [2020-09-17 02:34:23,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-17 02:34:23,989 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:34:23,989 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:34:24,190 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:34:24,190 INFO L427 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:34:24,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:34:24,191 INFO L82 PathProgramCache]: Analyzing trace with hash -1235504199, now seen corresponding path program 75 times [2020-09-17 02:34:24,191 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:34:24,191 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441505325] [2020-09-17 02:34:24,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:34:24,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:34:24,385 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:24,385 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441505325] [2020-09-17 02:34:24,385 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568464731] [2020-09-17 02:34:24,386 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:34:24,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-09-17 02:34:24,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:34:24,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-17 02:34:24,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:34:24,477 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:24,478 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:34:24,478 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-17 02:34:24,479 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224161956] [2020-09-17 02:34:24,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:34:24,479 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:34:24,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:34:24,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:34:24,480 INFO L87 Difference]: Start difference. First operand 60 states and 149 transitions. Second operand 15 states. [2020-09-17 02:34:25,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:34:25,050 INFO L93 Difference]: Finished difference Result 97 states and 225 transitions. [2020-09-17 02:34:25,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-17 02:34:25,051 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-09-17 02:34:25,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:34:25,052 INFO L225 Difference]: With dead ends: 97 [2020-09-17 02:34:25,052 INFO L226 Difference]: Without dead ends: 91 [2020-09-17 02:34:25,052 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=322, Invalid=800, Unknown=0, NotChecked=0, Total=1122 [2020-09-17 02:34:25,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-09-17 02:34:25,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 63. [2020-09-17 02:34:25,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-17 02:34:25,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-09-17 02:34:25,054 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 19 [2020-09-17 02:34:25,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:34:25,054 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-09-17 02:34:25,054 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:34:25,055 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-09-17 02:34:25,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-17 02:34:25,055 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:34:25,055 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:34:25,260 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2020-09-17 02:34:25,261 INFO L427 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:34:25,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:34:25,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1339335453, now seen corresponding path program 76 times [2020-09-17 02:34:25,262 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:34:25,262 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996324180] [2020-09-17 02:34:25,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:34:25,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:34:25,443 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:25,444 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996324180] [2020-09-17 02:34:25,444 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845647687] [2020-09-17 02:34:25,444 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:34:25,512 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:34:25,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:34:25,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-17 02:34:25,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:34:25,546 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:34:25,567 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:25,567 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:34:25,568 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-17 02:34:25,568 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612047967] [2020-09-17 02:34:25,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-17 02:34:25,569 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:34:25,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-17 02:34:25,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-09-17 02:34:25,569 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 16 states. [2020-09-17 02:34:26,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:34:26,405 INFO L93 Difference]: Finished difference Result 94 states and 219 transitions. [2020-09-17 02:34:26,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-17 02:34:26,407 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-17 02:34:26,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:34:26,408 INFO L225 Difference]: With dead ends: 94 [2020-09-17 02:34:26,408 INFO L226 Difference]: Without dead ends: 88 [2020-09-17 02:34:26,409 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=331, Invalid=859, Unknown=0, NotChecked=0, Total=1190 [2020-09-17 02:34:26,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-09-17 02:34:26,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 62. [2020-09-17 02:34:26,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-17 02:34:26,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-09-17 02:34:26,414 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 19 [2020-09-17 02:34:26,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:34:26,414 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-09-17 02:34:26,415 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-17 02:34:26,415 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-09-17 02:34:26,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-17 02:34:26,416 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:34:26,416 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:34:26,629 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:34:26,629 INFO L427 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:34:26,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:34:26,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1810331163, now seen corresponding path program 77 times [2020-09-17 02:34:26,630 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:34:26,631 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938348984] [2020-09-17 02:34:26,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:34:26,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:34:26,850 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:26,851 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938348984] [2020-09-17 02:34:26,851 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040719275] [2020-09-17 02:34:26,852 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:34:26,928 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-09-17 02:34:26,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:34:26,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-17 02:34:26,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:34:26,960 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:26,961 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:34:26,961 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-17 02:34:26,962 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92334439] [2020-09-17 02:34:26,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:34:26,963 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:34:26,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:34:26,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:34:26,963 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 15 states. [2020-09-17 02:34:27,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:34:27,635 INFO L93 Difference]: Finished difference Result 95 states and 223 transitions. [2020-09-17 02:34:27,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-17 02:34:27,636 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-09-17 02:34:27,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:34:27,637 INFO L225 Difference]: With dead ends: 95 [2020-09-17 02:34:27,637 INFO L226 Difference]: Without dead ends: 89 [2020-09-17 02:34:27,638 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=382, Invalid=878, Unknown=0, NotChecked=0, Total=1260 [2020-09-17 02:34:27,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-09-17 02:34:27,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 65. [2020-09-17 02:34:27,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-09-17 02:34:27,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 163 transitions. [2020-09-17 02:34:27,641 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 163 transitions. Word has length 19 [2020-09-17 02:34:27,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:34:27,641 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 163 transitions. [2020-09-17 02:34:27,641 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:34:27,641 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 163 transitions. [2020-09-17 02:34:27,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-17 02:34:27,642 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:34:27,642 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:34:27,842 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-09-17 02:34:27,843 INFO L427 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:34:27,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:34:27,844 INFO L82 PathProgramCache]: Analyzing trace with hash 1826418303, now seen corresponding path program 78 times [2020-09-17 02:34:27,844 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:34:27,844 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432647483] [2020-09-17 02:34:27,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:34:27,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:34:28,031 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:28,031 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432647483] [2020-09-17 02:34:28,031 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914997208] [2020-09-17 02:34:28,032 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:34:28,101 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-09-17 02:34:28,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:34:28,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-17 02:34:28,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:34:28,137 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:34:28,156 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:28,156 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:34:28,157 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-17 02:34:28,157 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271047904] [2020-09-17 02:34:28,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-17 02:34:28,158 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:34:28,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-17 02:34:28,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-09-17 02:34:28,158 INFO L87 Difference]: Start difference. First operand 65 states and 163 transitions. Second operand 16 states. [2020-09-17 02:34:29,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:34:29,010 INFO L93 Difference]: Finished difference Result 92 states and 217 transitions. [2020-09-17 02:34:29,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-17 02:34:29,011 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-17 02:34:29,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:34:29,012 INFO L225 Difference]: With dead ends: 92 [2020-09-17 02:34:29,013 INFO L226 Difference]: Without dead ends: 86 [2020-09-17 02:34:29,013 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=392, Invalid=940, Unknown=0, NotChecked=0, Total=1332 [2020-09-17 02:34:29,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-09-17 02:34:29,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 64. [2020-09-17 02:34:29,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-17 02:34:29,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 161 transitions. [2020-09-17 02:34:29,018 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 161 transitions. Word has length 19 [2020-09-17 02:34:29,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:34:29,018 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 161 transitions. [2020-09-17 02:34:29,018 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-17 02:34:29,018 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 161 transitions. [2020-09-17 02:34:29,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-17 02:34:29,019 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:34:29,019 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:34:29,232 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:34:29,232 INFO L427 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:34:29,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:34:29,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1826908413, now seen corresponding path program 79 times [2020-09-17 02:34:29,233 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:34:29,234 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266447922] [2020-09-17 02:34:29,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:34:29,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:34:29,406 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:29,406 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266447922] [2020-09-17 02:34:29,407 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875156725] [2020-09-17 02:34:29,407 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:34:29,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:34:29,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-17 02:34:29,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:34:29,493 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:29,493 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:34:29,494 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-17 02:34:29,494 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900181480] [2020-09-17 02:34:29,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:34:29,494 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:34:29,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:34:29,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:34:29,495 INFO L87 Difference]: Start difference. First operand 64 states and 161 transitions. Second operand 15 states. [2020-09-17 02:34:30,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:34:30,217 INFO L93 Difference]: Finished difference Result 112 states and 267 transitions. [2020-09-17 02:34:30,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-17 02:34:30,218 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-09-17 02:34:30,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:34:30,219 INFO L225 Difference]: With dead ends: 112 [2020-09-17 02:34:30,219 INFO L226 Difference]: Without dead ends: 106 [2020-09-17 02:34:30,219 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=458, Invalid=948, Unknown=0, NotChecked=0, Total=1406 [2020-09-17 02:34:30,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-09-17 02:34:30,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 70. [2020-09-17 02:34:30,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-17 02:34:30,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 181 transitions. [2020-09-17 02:34:30,222 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 181 transitions. Word has length 19 [2020-09-17 02:34:30,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:34:30,223 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 181 transitions. [2020-09-17 02:34:30,223 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:34:30,223 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 181 transitions. [2020-09-17 02:34:30,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-17 02:34:30,223 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:34:30,223 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:34:30,427 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:34:30,428 INFO L427 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:34:30,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:34:30,428 INFO L82 PathProgramCache]: Analyzing trace with hash 1826925153, now seen corresponding path program 80 times [2020-09-17 02:34:30,428 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:34:30,429 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876096736] [2020-09-17 02:34:30,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:34:30,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:34:30,602 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:30,603 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876096736] [2020-09-17 02:34:30,603 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421124142] [2020-09-17 02:34:30,603 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:34:30,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:34:30,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:34:30,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-17 02:34:30,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:34:30,730 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:34:30,750 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:30,751 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:34:30,751 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-17 02:34:30,751 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406743120] [2020-09-17 02:34:30,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-17 02:34:30,752 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:34:30,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-17 02:34:30,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-09-17 02:34:30,753 INFO L87 Difference]: Start difference. First operand 70 states and 181 transitions. Second operand 16 states. [2020-09-17 02:34:31,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:34:31,590 INFO L93 Difference]: Finished difference Result 93 states and 223 transitions. [2020-09-17 02:34:31,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-17 02:34:31,591 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-17 02:34:31,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:34:31,592 INFO L225 Difference]: With dead ends: 93 [2020-09-17 02:34:31,592 INFO L226 Difference]: Without dead ends: 85 [2020-09-17 02:34:31,593 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=469, Invalid=1013, Unknown=0, NotChecked=0, Total=1482 [2020-09-17 02:34:31,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-17 02:34:31,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 67. [2020-09-17 02:34:31,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-09-17 02:34:31,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 169 transitions. [2020-09-17 02:34:31,596 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 169 transitions. Word has length 19 [2020-09-17 02:34:31,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:34:31,596 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 169 transitions. [2020-09-17 02:34:31,597 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-17 02:34:31,597 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 169 transitions. [2020-09-17 02:34:31,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-17 02:34:31,597 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:34:31,598 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:34:31,807 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:34:31,807 INFO L427 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:34:31,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:34:31,808 INFO L82 PathProgramCache]: Analyzing trace with hash 846490750, now seen corresponding path program 81 times [2020-09-17 02:34:31,808 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:34:31,808 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036499644] [2020-09-17 02:34:31,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:34:31,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:34:32,076 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:32,077 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036499644] [2020-09-17 02:34:32,077 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450118758] [2020-09-17 02:34:32,077 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:34:32,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-09-17 02:34:32,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:34:32,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-17 02:34:32,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:34:32,166 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:32,167 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:34:32,167 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-17 02:34:32,167 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211403326] [2020-09-17 02:34:32,168 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-17 02:34:32,168 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:34:32,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-17 02:34:32,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-09-17 02:34:32,168 INFO L87 Difference]: Start difference. First operand 67 states and 169 transitions. Second operand 16 states. [2020-09-17 02:34:32,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:34:32,633 INFO L93 Difference]: Finished difference Result 104 states and 243 transitions. [2020-09-17 02:34:32,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-17 02:34:32,633 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-09-17 02:34:32,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:34:32,635 INFO L225 Difference]: With dead ends: 104 [2020-09-17 02:34:32,635 INFO L226 Difference]: Without dead ends: 98 [2020-09-17 02:34:32,635 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=247, Invalid=565, Unknown=0, NotChecked=0, Total=812 [2020-09-17 02:34:32,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-17 02:34:32,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 69. [2020-09-17 02:34:32,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-17 02:34:32,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-09-17 02:34:32,639 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-09-17 02:34:32,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:34:32,640 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-09-17 02:34:32,640 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-17 02:34:32,640 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-09-17 02:34:32,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-17 02:34:32,641 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:34:32,641 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:34:32,851 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:34:32,851 INFO L427 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:34:32,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:34:32,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1831682274, now seen corresponding path program 82 times [2020-09-17 02:34:32,853 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:34:32,853 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793146347] [2020-09-17 02:34:32,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:34:32,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:34:33,096 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:33,097 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793146347] [2020-09-17 02:34:33,097 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881093727] [2020-09-17 02:34:33,097 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:34:33,162 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:34:33,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:34:33,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-17 02:34:33,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:34:33,191 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:34:33,206 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:33,207 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:34:33,207 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-17 02:34:33,207 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458094675] [2020-09-17 02:34:33,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:34:33,208 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:34:33,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:34:33,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:34:33,208 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-09-17 02:34:33,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:34:33,755 INFO L93 Difference]: Finished difference Result 101 states and 237 transitions. [2020-09-17 02:34:33,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-17 02:34:33,756 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-17 02:34:33,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:34:33,757 INFO L225 Difference]: With dead ends: 101 [2020-09-17 02:34:33,757 INFO L226 Difference]: Without dead ends: 95 [2020-09-17 02:34:33,758 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=285, Invalid=707, Unknown=0, NotChecked=0, Total=992 [2020-09-17 02:34:33,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-09-17 02:34:33,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 68. [2020-09-17 02:34:33,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-17 02:34:33,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-09-17 02:34:33,761 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-09-17 02:34:33,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:34:33,761 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-09-17 02:34:33,761 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:34:33,761 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-09-17 02:34:33,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-17 02:34:33,762 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:34:33,762 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:34:33,962 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:34:33,963 INFO L427 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:34:33,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:34:33,964 INFO L82 PathProgramCache]: Analyzing trace with hash 214523232, now seen corresponding path program 83 times [2020-09-17 02:34:33,964 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:34:33,965 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134127155] [2020-09-17 02:34:33,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:34:33,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:34:34,193 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:34,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134127155] [2020-09-17 02:34:34,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300309943] [2020-09-17 02:34:34,194 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:34:34,263 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-09-17 02:34:34,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:34:34,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-17 02:34:34,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:34:34,284 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:34,285 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:34:34,285 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-17 02:34:34,285 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101712146] [2020-09-17 02:34:34,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-17 02:34:34,286 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:34:34,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-17 02:34:34,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-09-17 02:34:34,286 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-09-17 02:34:34,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:34:34,801 INFO L93 Difference]: Finished difference Result 98 states and 231 transitions. [2020-09-17 02:34:34,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-17 02:34:34,802 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-09-17 02:34:34,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:34:34,804 INFO L225 Difference]: With dead ends: 98 [2020-09-17 02:34:34,804 INFO L226 Difference]: Without dead ends: 92 [2020-09-17 02:34:34,804 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=260, Invalid=670, Unknown=0, NotChecked=0, Total=930 [2020-09-17 02:34:34,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-09-17 02:34:34,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 69. [2020-09-17 02:34:34,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-17 02:34:34,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-09-17 02:34:34,808 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-09-17 02:34:34,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:34:34,809 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-09-17 02:34:34,809 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-17 02:34:34,809 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-09-17 02:34:34,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-17 02:34:34,810 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:34:34,810 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:34:35,011 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:34:35,012 INFO L427 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:34:35,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:34:35,012 INFO L82 PathProgramCache]: Analyzing trace with hash 1471412932, now seen corresponding path program 84 times [2020-09-17 02:34:35,013 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:34:35,013 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544521940] [2020-09-17 02:34:35,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:34:35,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:34:35,287 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:35,288 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544521940] [2020-09-17 02:34:35,288 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001553271] [2020-09-17 02:34:35,288 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:34:35,362 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-09-17 02:34:35,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:34:35,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-17 02:34:35,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:34:35,394 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:34:35,411 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:35,411 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:34:35,412 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-17 02:34:35,412 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669265311] [2020-09-17 02:34:35,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:34:35,413 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:34:35,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:34:35,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:34:35,414 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-09-17 02:34:36,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:34:36,085 INFO L93 Difference]: Finished difference Result 97 states and 229 transitions. [2020-09-17 02:34:36,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-17 02:34:36,086 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-17 02:34:36,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:34:36,087 INFO L225 Difference]: With dead ends: 97 [2020-09-17 02:34:36,087 INFO L226 Difference]: Without dead ends: 91 [2020-09-17 02:34:36,088 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=305, Invalid=817, Unknown=0, NotChecked=0, Total=1122 [2020-09-17 02:34:36,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-09-17 02:34:36,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 68. [2020-09-17 02:34:36,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-17 02:34:36,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-09-17 02:34:36,092 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-09-17 02:34:36,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:34:36,093 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-09-17 02:34:36,093 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:34:36,093 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-09-17 02:34:36,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-17 02:34:36,094 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:34:36,094 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:34:36,298 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:34:36,299 INFO L427 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:34:36,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:34:36,299 INFO L82 PathProgramCache]: Analyzing trace with hash -1207361854, now seen corresponding path program 85 times [2020-09-17 02:34:36,300 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:34:36,300 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156937158] [2020-09-17 02:34:36,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:34:36,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:34:36,523 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:36,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156937158] [2020-09-17 02:34:36,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841266633] [2020-09-17 02:34:36,524 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:34:36,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:34:36,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-17 02:34:36,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:34:36,604 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:36,605 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:34:36,605 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-17 02:34:36,605 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052265574] [2020-09-17 02:34:36,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-17 02:34:36,606 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:34:36,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-17 02:34:36,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-09-17 02:34:36,606 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-09-17 02:34:37,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:34:37,174 INFO L93 Difference]: Finished difference Result 94 states and 223 transitions. [2020-09-17 02:34:37,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-17 02:34:37,175 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-09-17 02:34:37,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:34:37,177 INFO L225 Difference]: With dead ends: 94 [2020-09-17 02:34:37,177 INFO L226 Difference]: Without dead ends: 88 [2020-09-17 02:34:37,177 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=289, Invalid=767, Unknown=0, NotChecked=0, Total=1056 [2020-09-17 02:34:37,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-09-17 02:34:37,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 69. [2020-09-17 02:34:37,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-17 02:34:37,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-09-17 02:34:37,180 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-09-17 02:34:37,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:34:37,180 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-09-17 02:34:37,180 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-17 02:34:37,180 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-09-17 02:34:37,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-17 02:34:37,180 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:34:37,181 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:34:37,381 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2020-09-17 02:34:37,382 INFO L427 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:34:37,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:34:37,382 INFO L82 PathProgramCache]: Analyzing trace with hash -687618778, now seen corresponding path program 86 times [2020-09-17 02:34:37,383 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:34:37,383 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165833646] [2020-09-17 02:34:37,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:34:37,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:34:37,616 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:37,616 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165833646] [2020-09-17 02:34:37,617 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981595251] [2020-09-17 02:34:37,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:34:37,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:34:37,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:34:37,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-17 02:34:37,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:34:37,714 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:34:37,730 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:37,730 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:34:37,731 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-17 02:34:37,731 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109789135] [2020-09-17 02:34:37,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:34:37,731 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:34:37,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:34:37,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:34:37,732 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-09-17 02:34:38,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:34:38,461 INFO L93 Difference]: Finished difference Result 93 states and 221 transitions. [2020-09-17 02:34:38,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-17 02:34:38,462 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-17 02:34:38,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:34:38,463 INFO L225 Difference]: With dead ends: 93 [2020-09-17 02:34:38,463 INFO L226 Difference]: Without dead ends: 87 [2020-09-17 02:34:38,464 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=341, Invalid=919, Unknown=0, NotChecked=0, Total=1260 [2020-09-17 02:34:38,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-09-17 02:34:38,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 68. [2020-09-17 02:34:38,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-17 02:34:38,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-09-17 02:34:38,466 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-09-17 02:34:38,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:34:38,466 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-09-17 02:34:38,466 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:34:38,467 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-09-17 02:34:38,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-17 02:34:38,467 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:34:38,467 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:34:38,668 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:34:38,668 INFO L427 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:34:38,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:34:38,669 INFO L82 PathProgramCache]: Analyzing trace with hash 967692452, now seen corresponding path program 87 times [2020-09-17 02:34:38,669 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:34:38,670 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35668207] [2020-09-17 02:34:38,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:34:38,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:34:38,899 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:38,900 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35668207] [2020-09-17 02:34:38,900 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864649997] [2020-09-17 02:34:38,901 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:34:38,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-09-17 02:34:38,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:34:38,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-17 02:34:38,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:34:38,999 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:39,000 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:34:39,000 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-17 02:34:39,000 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238092947] [2020-09-17 02:34:39,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-17 02:34:39,001 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:34:39,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-17 02:34:39,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-09-17 02:34:39,002 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-09-17 02:34:39,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:34:39,695 INFO L93 Difference]: Finished difference Result 90 states and 215 transitions. [2020-09-17 02:34:39,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-17 02:34:39,696 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-09-17 02:34:39,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:34:39,697 INFO L225 Difference]: With dead ends: 90 [2020-09-17 02:34:39,697 INFO L226 Difference]: Without dead ends: 84 [2020-09-17 02:34:39,698 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=334, Invalid=856, Unknown=0, NotChecked=0, Total=1190 [2020-09-17 02:34:39,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-09-17 02:34:39,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 69. [2020-09-17 02:34:39,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-17 02:34:39,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-09-17 02:34:39,704 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-09-17 02:34:39,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:34:39,704 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-09-17 02:34:39,704 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-17 02:34:39,704 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-09-17 02:34:39,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-17 02:34:39,705 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:34:39,705 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:34:39,915 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2020-09-17 02:34:39,916 INFO L427 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:34:39,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:34:39,917 INFO L82 PathProgramCache]: Analyzing trace with hash -752435192, now seen corresponding path program 88 times [2020-09-17 02:34:39,917 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:34:39,917 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358047674] [2020-09-17 02:34:39,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:34:39,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:34:40,148 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:40,149 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358047674] [2020-09-17 02:34:40,149 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579138168] [2020-09-17 02:34:40,150 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 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:34:40,227 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:34:40,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:34:40,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-17 02:34:40,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:34:40,260 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:34:40,279 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:40,280 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:34:40,280 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-17 02:34:40,281 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884896042] [2020-09-17 02:34:40,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:34:40,281 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:34:40,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:34:40,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:34:40,282 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-09-17 02:34:41,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:34:41,165 INFO L93 Difference]: Finished difference Result 89 states and 213 transitions. [2020-09-17 02:34:41,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-17 02:34:41,166 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-17 02:34:41,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:34:41,168 INFO L225 Difference]: With dead ends: 89 [2020-09-17 02:34:41,168 INFO L226 Difference]: Without dead ends: 83 [2020-09-17 02:34:41,168 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=393, Invalid=1013, Unknown=0, NotChecked=0, Total=1406 [2020-09-17 02:34:41,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-17 02:34:41,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 68. [2020-09-17 02:34:41,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-17 02:34:41,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-09-17 02:34:41,172 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-09-17 02:34:41,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:34:41,172 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-09-17 02:34:41,172 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:34:41,172 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-09-17 02:34:41,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-17 02:34:41,173 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:34:41,173 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:34:41,382 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:34:41,382 INFO L427 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:34:41,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:34:41,383 INFO L82 PathProgramCache]: Analyzing trace with hash -281439482, now seen corresponding path program 89 times [2020-09-17 02:34:41,384 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:34:41,384 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974460860] [2020-09-17 02:34:41,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:34:41,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:34:41,601 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:41,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974460860] [2020-09-17 02:34:41,602 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505813047] [2020-09-17 02:34:41,602 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:34:41,665 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-09-17 02:34:41,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:34:41,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-17 02:34:41,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:34:41,691 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:41,692 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:34:41,692 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-17 02:34:41,693 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818209689] [2020-09-17 02:34:41,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-17 02:34:41,693 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:34:41,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-17 02:34:41,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-09-17 02:34:41,694 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-09-17 02:34:42,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:34:42,441 INFO L93 Difference]: Finished difference Result 86 states and 207 transitions. [2020-09-17 02:34:42,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-17 02:34:42,442 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-09-17 02:34:42,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:34:42,443 INFO L225 Difference]: With dead ends: 86 [2020-09-17 02:34:42,443 INFO L226 Difference]: Without dead ends: 80 [2020-09-17 02:34:42,444 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=395, Invalid=937, Unknown=0, NotChecked=0, Total=1332 [2020-09-17 02:34:42,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-17 02:34:42,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 69. [2020-09-17 02:34:42,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-17 02:34:42,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-09-17 02:34:42,447 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-09-17 02:34:42,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:34:42,448 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-09-17 02:34:42,448 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-17 02:34:42,448 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-09-17 02:34:42,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-17 02:34:42,449 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:34:42,449 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:34:42,660 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:34:42,661 INFO L427 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:34:42,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:34:42,661 INFO L82 PathProgramCache]: Analyzing trace with hash -265352342, now seen corresponding path program 90 times [2020-09-17 02:34:42,662 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:34:42,662 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452954179] [2020-09-17 02:34:42,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:34:42,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:34:42,883 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:42,884 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452954179] [2020-09-17 02:34:42,884 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635139722] [2020-09-17 02:34:42,884 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:34:42,955 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-09-17 02:34:42,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:34:42,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-17 02:34:42,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:34:42,993 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:34:43,011 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:43,012 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:34:43,012 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-17 02:34:43,012 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818982431] [2020-09-17 02:34:43,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:34:43,013 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:34:43,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:34:43,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:34:43,014 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-09-17 02:34:44,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:34:44,046 INFO L93 Difference]: Finished difference Result 85 states and 205 transitions. [2020-09-17 02:34:44,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-17 02:34:44,048 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-17 02:34:44,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:34:44,049 INFO L225 Difference]: With dead ends: 85 [2020-09-17 02:34:44,049 INFO L226 Difference]: Without dead ends: 79 [2020-09-17 02:34:44,049 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=461, Invalid=1099, Unknown=0, NotChecked=0, Total=1560 [2020-09-17 02:34:44,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-09-17 02:34:44,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 68. [2020-09-17 02:34:44,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-17 02:34:44,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-09-17 02:34:44,052 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-09-17 02:34:44,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:34:44,052 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-09-17 02:34:44,052 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:34:44,052 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-09-17 02:34:44,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-17 02:34:44,052 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:34:44,052 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:34:44,254 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:34:44,255 INFO L427 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:34:44,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:34:44,255 INFO L82 PathProgramCache]: Analyzing trace with hash -264862232, now seen corresponding path program 91 times [2020-09-17 02:34:44,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:34:44,256 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120583031] [2020-09-17 02:34:44,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:34:44,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:34:44,486 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:44,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120583031] [2020-09-17 02:34:44,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818494405] [2020-09-17 02:34:44,487 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:34:44,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:34:44,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-17 02:34:44,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:34:44,576 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:44,576 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:34:44,577 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-17 02:34:44,577 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140966126] [2020-09-17 02:34:44,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-17 02:34:44,577 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:34:44,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-17 02:34:44,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-09-17 02:34:44,578 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-09-17 02:34:45,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:34:45,404 INFO L93 Difference]: Finished difference Result 101 states and 245 transitions. [2020-09-17 02:34:45,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-17 02:34:45,406 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-09-17 02:34:45,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:34:45,407 INFO L225 Difference]: With dead ends: 101 [2020-09-17 02:34:45,407 INFO L226 Difference]: Without dead ends: 95 [2020-09-17 02:34:45,408 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=472, Invalid=1010, Unknown=0, NotChecked=0, Total=1482 [2020-09-17 02:34:45,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-09-17 02:34:45,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 72. [2020-09-17 02:34:45,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-17 02:34:45,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 185 transitions. [2020-09-17 02:34:45,410 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 185 transitions. Word has length 20 [2020-09-17 02:34:45,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:34:45,411 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 185 transitions. [2020-09-17 02:34:45,411 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-17 02:34:45,411 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 185 transitions. [2020-09-17 02:34:45,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-17 02:34:45,411 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:34:45,412 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:34:45,614 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:34:45,615 INFO L427 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:34:45,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:34:45,615 INFO L82 PathProgramCache]: Analyzing trace with hash -264845492, now seen corresponding path program 92 times [2020-09-17 02:34:45,616 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:34:45,616 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151842708] [2020-09-17 02:34:45,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:34:45,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:34:45,822 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:45,823 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151842708] [2020-09-17 02:34:45,823 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012127486] [2020-09-17 02:34:45,823 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:34:45,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:34:45,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:34:45,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-17 02:34:45,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:34:45,923 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:34:45,941 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:45,941 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:34:45,942 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-17 02:34:45,942 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737245441] [2020-09-17 02:34:45,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:34:45,943 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:34:45,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:34:45,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:34:45,944 INFO L87 Difference]: Start difference. First operand 72 states and 185 transitions. Second operand 17 states. [2020-09-17 02:34:46,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:34:46,968 INFO L93 Difference]: Finished difference Result 82 states and 201 transitions. [2020-09-17 02:34:46,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-17 02:34:46,969 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-17 02:34:46,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:34:46,970 INFO L225 Difference]: With dead ends: 82 [2020-09-17 02:34:46,970 INFO L226 Difference]: Without dead ends: 74 [2020-09-17 02:34:46,971 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=545, Invalid=1177, Unknown=0, NotChecked=0, Total=1722 [2020-09-17 02:34:46,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-09-17 02:34:46,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 53. [2020-09-17 02:34:46,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-09-17 02:34:46,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 128 transitions. [2020-09-17 02:34:46,974 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 128 transitions. Word has length 20 [2020-09-17 02:34:46,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:34:46,974 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 128 transitions. [2020-09-17 02:34:46,974 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:34:46,974 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 128 transitions. [2020-09-17 02:34:46,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-17 02:34:46,975 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:34:46,975 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:34:47,186 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:34:47,186 INFO L427 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:34:47,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:34:47,186 INFO L82 PathProgramCache]: Analyzing trace with hash 800121202, now seen corresponding path program 93 times [2020-09-17 02:34:47,187 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:34:47,187 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338409959] [2020-09-17 02:34:47,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:34:47,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:34:47,384 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:47,384 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338409959] [2020-09-17 02:34:47,384 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856944125] [2020-09-17 02:34:47,385 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:34:47,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-09-17 02:34:47,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:34:47,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-17 02:34:47,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:34:47,478 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:34:47,498 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:47,499 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:34:47,499 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-17 02:34:47,499 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378737568] [2020-09-17 02:34:47,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:34:47,500 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:34:47,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:34:47,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:34:47,500 INFO L87 Difference]: Start difference. First operand 53 states and 128 transitions. Second operand 17 states. [2020-09-17 02:34:48,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:34:48,437 INFO L93 Difference]: Finished difference Result 92 states and 223 transitions. [2020-09-17 02:34:48,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-17 02:34:48,438 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-17 02:34:48,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:34:48,439 INFO L225 Difference]: With dead ends: 92 [2020-09-17 02:34:48,439 INFO L226 Difference]: Without dead ends: 87 [2020-09-17 02:34:48,440 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=574, Invalid=1148, Unknown=0, NotChecked=0, Total=1722 [2020-09-17 02:34:48,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-09-17 02:34:48,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 70. [2020-09-17 02:34:48,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-17 02:34:48,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 177 transitions. [2020-09-17 02:34:48,442 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 177 transitions. Word has length 20 [2020-09-17 02:34:48,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:34:48,442 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 177 transitions. [2020-09-17 02:34:48,442 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:34:48,442 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 177 transitions. [2020-09-17 02:34:48,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-17 02:34:48,443 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:34:48,443 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:34:48,643 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:34:48,644 INFO L427 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:34:48,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:34:48,645 INFO L82 PathProgramCache]: Analyzing trace with hash 379740647, now seen corresponding path program 94 times [2020-09-17 02:34:48,645 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:34:48,645 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083618612] [2020-09-17 02:34:48,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:34:48,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:34:48,869 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:48,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083618612] [2020-09-17 02:34:48,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902118932] [2020-09-17 02:34:48,870 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:34:48,931 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:34:48,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:34:48,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-17 02:34:48,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:34:48,972 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:34:48,995 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:48,996 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:34:48,996 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-17 02:34:48,996 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872726434] [2020-09-17 02:34:48,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-17 02:34:48,997 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:34:48,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-17 02:34:48,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2020-09-17 02:34:48,997 INFO L87 Difference]: Start difference. First operand 70 states and 177 transitions. Second operand 18 states. [2020-09-17 02:34:49,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:34:49,995 INFO L93 Difference]: Finished difference Result 78 states and 197 transitions. [2020-09-17 02:34:49,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-17 02:34:49,996 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-17 02:34:49,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:34:49,997 INFO L225 Difference]: With dead ends: 78 [2020-09-17 02:34:49,997 INFO L226 Difference]: Without dead ends: 73 [2020-09-17 02:34:49,998 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=589, Invalid=1217, Unknown=0, NotChecked=0, Total=1806 [2020-09-17 02:34:49,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-17 02:34:49,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 54. [2020-09-17 02:34:49,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-17 02:34:50,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 132 transitions. [2020-09-17 02:34:50,000 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 132 transitions. Word has length 21 [2020-09-17 02:34:50,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:34:50,000 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 132 transitions. [2020-09-17 02:34:50,000 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-17 02:34:50,000 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 132 transitions. [2020-09-17 02:34:50,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-17 02:34:50,001 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:34:50,001 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:34:50,202 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2020-09-17 02:34:50,202 INFO L427 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:34:50,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:34:50,203 INFO L82 PathProgramCache]: Analyzing trace with hash 1875703058, now seen corresponding path program 95 times [2020-09-17 02:34:50,203 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:34:50,203 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679454067] [2020-09-17 02:34:50,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:34:50,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:34:50,518 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:50,518 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679454067] [2020-09-17 02:34:50,519 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111401651] [2020-09-17 02:34:50,519 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:34:50,587 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-09-17 02:34:50,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:34:50,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-17 02:34:50,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:34:50,612 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:50,613 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:34:50,613 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-17 02:34:50,613 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734386466] [2020-09-17 02:34:50,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:34:50,614 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:34:50,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:34:50,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:34:50,615 INFO L87 Difference]: Start difference. First operand 54 states and 132 transitions. Second operand 17 states. [2020-09-17 02:34:51,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:34:51,064 INFO L93 Difference]: Finished difference Result 84 states and 195 transitions. [2020-09-17 02:34:51,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-17 02:34:51,065 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-09-17 02:34:51,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:34:51,066 INFO L225 Difference]: With dead ends: 84 [2020-09-17 02:34:51,066 INFO L226 Difference]: Without dead ends: 78 [2020-09-17 02:34:51,067 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=283, Invalid=587, Unknown=0, NotChecked=0, Total=870 [2020-09-17 02:34:51,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-17 02:34:51,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 62. [2020-09-17 02:34:51,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-17 02:34:51,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 151 transitions. [2020-09-17 02:34:51,069 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 151 transitions. Word has length 21 [2020-09-17 02:34:51,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:34:51,069 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 151 transitions. [2020-09-17 02:34:51,070 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:34:51,070 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 151 transitions. [2020-09-17 02:34:51,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-17 02:34:51,070 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:34:51,070 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:34:51,271 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:34:51,271 INFO L427 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:34:51,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:34:51,272 INFO L82 PathProgramCache]: Analyzing trace with hash -543014794, now seen corresponding path program 96 times [2020-09-17 02:34:51,272 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:34:51,273 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879624756] [2020-09-17 02:34:51,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:34:51,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:34:51,583 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:51,583 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879624756] [2020-09-17 02:34:51,584 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568883765] [2020-09-17 02:34:51,584 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:34:51,656 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-17 02:34:51,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:34:51,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-17 02:34:51,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:34:51,688 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:34:51,701 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:51,702 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:34:51,702 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-17 02:34:51,702 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541894638] [2020-09-17 02:34:51,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-17 02:34:51,703 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:34:51,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-17 02:34:51,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-09-17 02:34:51,704 INFO L87 Difference]: Start difference. First operand 62 states and 151 transitions. Second operand 18 states. [2020-09-17 02:34:52,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:34:52,262 INFO L93 Difference]: Finished difference Result 98 states and 223 transitions. [2020-09-17 02:34:52,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-17 02:34:52,263 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-17 02:34:52,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:34:52,264 INFO L225 Difference]: With dead ends: 98 [2020-09-17 02:34:52,265 INFO L226 Difference]: Without dead ends: 92 [2020-09-17 02:34:52,265 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=292, Invalid=700, Unknown=0, NotChecked=0, Total=992 [2020-09-17 02:34:52,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-09-17 02:34:52,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 60. [2020-09-17 02:34:52,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-17 02:34:52,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 147 transitions. [2020-09-17 02:34:52,267 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 147 transitions. Word has length 21 [2020-09-17 02:34:52,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:34:52,267 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 147 transitions. [2020-09-17 02:34:52,267 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-17 02:34:52,267 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 147 transitions. [2020-09-17 02:34:52,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-17 02:34:52,268 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:34:52,268 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:34:52,468 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2020-09-17 02:34:52,469 INFO L427 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:34:52,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:34:52,469 INFO L82 PathProgramCache]: Analyzing trace with hash 145306996, now seen corresponding path program 97 times [2020-09-17 02:34:52,470 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:34:52,470 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670228788] [2020-09-17 02:34:52,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:34:52,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:34:52,765 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:52,766 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670228788] [2020-09-17 02:34:52,766 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550279799] [2020-09-17 02:34:52,766 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:34:52,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:34:52,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-17 02:34:52,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:34:52,851 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:52,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:34:52,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-17 02:34:52,852 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911136287] [2020-09-17 02:34:52,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:34:52,852 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:34:52,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:34:52,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:34:52,853 INFO L87 Difference]: Start difference. First operand 60 states and 147 transitions. Second operand 17 states. [2020-09-17 02:34:53,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:34:53,543 INFO L93 Difference]: Finished difference Result 99 states and 227 transitions. [2020-09-17 02:34:53,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-17 02:34:53,545 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-09-17 02:34:53,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:34:53,546 INFO L225 Difference]: With dead ends: 99 [2020-09-17 02:34:53,546 INFO L226 Difference]: Without dead ends: 93 [2020-09-17 02:34:53,547 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=298, Invalid=758, Unknown=0, NotChecked=0, Total=1056 [2020-09-17 02:34:53,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-17 02:34:53,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 63. [2020-09-17 02:34:53,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-17 02:34:53,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 155 transitions. [2020-09-17 02:34:53,552 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 155 transitions. Word has length 21 [2020-09-17 02:34:53,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:34:53,552 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 155 transitions. [2020-09-17 02:34:53,553 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:34:53,553 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 155 transitions. [2020-09-17 02:34:53,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-17 02:34:53,554 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:34:53,554 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:34:53,767 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:34:53,767 INFO L427 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:34:53,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:34:53,768 INFO L82 PathProgramCache]: Analyzing trace with hash 1130498520, now seen corresponding path program 98 times [2020-09-17 02:34:53,768 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:34:53,769 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883779202] [2020-09-17 02:34:53,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:34:53,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:34:54,152 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:54,153 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883779202] [2020-09-17 02:34:54,154 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771583541] [2020-09-17 02:34:54,154 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:34:54,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:34:54,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:34:54,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-17 02:34:54,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:34:54,285 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:34:54,307 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:54,308 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:34:54,308 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-17 02:34:54,309 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051810154] [2020-09-17 02:34:54,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-17 02:34:54,310 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:34:54,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-17 02:34:54,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-09-17 02:34:54,311 INFO L87 Difference]: Start difference. First operand 63 states and 155 transitions. Second operand 18 states. [2020-09-17 02:34:54,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:34:54,988 INFO L93 Difference]: Finished difference Result 109 states and 247 transitions. [2020-09-17 02:34:54,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-17 02:34:54,989 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-17 02:34:54,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:34:54,990 INFO L225 Difference]: With dead ends: 109 [2020-09-17 02:34:54,990 INFO L226 Difference]: Without dead ends: 103 [2020-09-17 02:34:54,990 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=328, Invalid=862, Unknown=0, NotChecked=0, Total=1190 [2020-09-17 02:34:54,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-17 02:34:54,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 62. [2020-09-17 02:34:54,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-17 02:34:54,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 153 transitions. [2020-09-17 02:34:54,993 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 153 transitions. Word has length 21 [2020-09-17 02:34:54,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:34:54,994 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 153 transitions. [2020-09-17 02:34:54,994 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-17 02:34:54,994 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 153 transitions. [2020-09-17 02:34:54,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-17 02:34:54,994 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:34:54,995 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:34:55,204 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:34:55,205 INFO L427 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:34:55,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:34:55,205 INFO L82 PathProgramCache]: Analyzing trace with hash -486660522, now seen corresponding path program 99 times [2020-09-17 02:34:55,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:34:55,206 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048803392] [2020-09-17 02:34:55,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:34:55,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:34:55,489 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:55,490 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048803392] [2020-09-17 02:34:55,490 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932352272] [2020-09-17 02:34:55,490 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:34:55,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-09-17 02:34:55,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:34:55,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-17 02:34:55,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:34:55,587 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:55,588 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:34:55,588 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-17 02:34:55,588 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612079222] [2020-09-17 02:34:55,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:34:55,588 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:34:55,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:34:55,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:34:55,589 INFO L87 Difference]: Start difference. First operand 62 states and 153 transitions. Second operand 17 states. [2020-09-17 02:34:56,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:34:56,304 INFO L93 Difference]: Finished difference Result 109 states and 249 transitions. [2020-09-17 02:34:56,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-17 02:34:56,305 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-09-17 02:34:56,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:34:56,306 INFO L225 Difference]: With dead ends: 109 [2020-09-17 02:34:56,307 INFO L226 Difference]: Without dead ends: 103 [2020-09-17 02:34:56,307 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=348, Invalid=912, Unknown=0, NotChecked=0, Total=1260 [2020-09-17 02:34:56,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-17 02:34:56,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 65. [2020-09-17 02:34:56,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-09-17 02:34:56,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 161 transitions. [2020-09-17 02:34:56,311 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 161 transitions. Word has length 21 [2020-09-17 02:34:56,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:34:56,311 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 161 transitions. [2020-09-17 02:34:56,311 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:34:56,311 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 161 transitions. [2020-09-17 02:34:56,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-17 02:34:56,312 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:34:56,312 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:34:56,516 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2020-09-17 02:34:56,517 INFO L427 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:34:56,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:34:56,517 INFO L82 PathProgramCache]: Analyzing trace with hash 770229178, now seen corresponding path program 100 times [2020-09-17 02:34:56,518 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:34:56,518 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052240347] [2020-09-17 02:34:56,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:34:56,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:34:56,821 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:56,821 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052240347] [2020-09-17 02:34:56,822 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211125184] [2020-09-17 02:34:56,822 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:34:56,885 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:34:56,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:34:56,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-17 02:34:56,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:34:56,914 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:34:56,929 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:56,929 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:34:56,929 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-17 02:34:56,929 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895671995] [2020-09-17 02:34:56,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-17 02:34:56,930 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:34:56,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-17 02:34:56,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-09-17 02:34:56,930 INFO L87 Difference]: Start difference. First operand 65 states and 161 transitions. Second operand 18 states. [2020-09-17 02:34:57,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:34:57,672 INFO L93 Difference]: Finished difference Result 106 states and 243 transitions. [2020-09-17 02:34:57,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-17 02:34:57,673 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-17 02:34:57,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:34:57,675 INFO L225 Difference]: With dead ends: 106 [2020-09-17 02:34:57,675 INFO L226 Difference]: Without dead ends: 100 [2020-09-17 02:34:57,675 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=355, Invalid=977, Unknown=0, NotChecked=0, Total=1332 [2020-09-17 02:34:57,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-17 02:34:57,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 64. [2020-09-17 02:34:57,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-17 02:34:57,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 159 transitions. [2020-09-17 02:34:57,677 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 159 transitions. Word has length 21 [2020-09-17 02:34:57,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:34:57,677 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 159 transitions. [2020-09-17 02:34:57,677 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-17 02:34:57,677 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 159 transitions. [2020-09-17 02:34:57,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-17 02:34:57,678 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:34:57,678 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:34:57,887 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2020-09-17 02:34:57,888 INFO L427 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:34:57,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:34:57,888 INFO L82 PathProgramCache]: Analyzing trace with hash -1908545608, now seen corresponding path program 101 times [2020-09-17 02:34:57,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:34:57,889 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746516039] [2020-09-17 02:34:57,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:34:57,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:34:58,132 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:58,133 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746516039] [2020-09-17 02:34:58,133 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52258148] [2020-09-17 02:34:58,133 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:34:58,199 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-09-17 02:34:58,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:34:58,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-17 02:34:58,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:34:58,219 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:58,220 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:34:58,220 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-17 02:34:58,220 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694048278] [2020-09-17 02:34:58,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:34:58,220 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:34:58,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:34:58,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:34:58,221 INFO L87 Difference]: Start difference. First operand 64 states and 159 transitions. Second operand 17 states. [2020-09-17 02:34:58,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:34:58,930 INFO L93 Difference]: Finished difference Result 107 states and 247 transitions. [2020-09-17 02:34:58,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-17 02:34:58,931 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-09-17 02:34:58,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:34:58,933 INFO L225 Difference]: With dead ends: 107 [2020-09-17 02:34:58,933 INFO L226 Difference]: Without dead ends: 101 [2020-09-17 02:34:58,933 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=390, Invalid=1016, Unknown=0, NotChecked=0, Total=1406 [2020-09-17 02:34:58,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-17 02:34:58,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 67. [2020-09-17 02:34:58,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-09-17 02:34:58,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 167 transitions. [2020-09-17 02:34:58,936 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 167 transitions. Word has length 21 [2020-09-17 02:34:58,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:34:58,936 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 167 transitions. [2020-09-17 02:34:58,937 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:34:58,937 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 167 transitions. [2020-09-17 02:34:58,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-17 02:34:58,937 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:34:58,938 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:34:59,141 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:34:59,142 INFO L427 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:34:59,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:34:59,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1388802532, now seen corresponding path program 102 times [2020-09-17 02:34:59,143 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:34:59,143 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964630347] [2020-09-17 02:34:59,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:34:59,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:34:59,416 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:59,417 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964630347] [2020-09-17 02:34:59,417 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256712216] [2020-09-17 02:34:59,417 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 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:34:59,489 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-17 02:34:59,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:34:59,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-17 02:34:59,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:34:59,522 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:34:59,539 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:59,539 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:34:59,539 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-17 02:34:59,540 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103779756] [2020-09-17 02:34:59,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-17 02:34:59,540 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:34:59,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-17 02:34:59,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2020-09-17 02:34:59,541 INFO L87 Difference]: Start difference. First operand 67 states and 167 transitions. Second operand 18 states. [2020-09-17 02:35:00,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:00,461 INFO L93 Difference]: Finished difference Result 104 states and 241 transitions. [2020-09-17 02:35:00,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-17 02:35:00,462 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-17 02:35:00,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:00,463 INFO L225 Difference]: With dead ends: 104 [2020-09-17 02:35:00,463 INFO L226 Difference]: Without dead ends: 98 [2020-09-17 02:35:00,464 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=398, Invalid=1084, Unknown=0, NotChecked=0, Total=1482 [2020-09-17 02:35:00,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-17 02:35:00,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 66. [2020-09-17 02:35:00,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-17 02:35:00,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 165 transitions. [2020-09-17 02:35:00,468 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 165 transitions. Word has length 21 [2020-09-17 02:35:00,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:00,468 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 165 transitions. [2020-09-17 02:35:00,469 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-17 02:35:00,469 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 165 transitions. [2020-09-17 02:35:00,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-17 02:35:00,469 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:00,469 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:00,680 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2020-09-17 02:35:00,681 INFO L427 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:00,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:00,683 INFO L82 PathProgramCache]: Analyzing trace with hash 266508698, now seen corresponding path program 103 times [2020-09-17 02:35:00,683 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:00,684 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183362229] [2020-09-17 02:35:00,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:00,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:01,025 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:01,026 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183362229] [2020-09-17 02:35:01,026 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439879748] [2020-09-17 02:35:01,027 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:01,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:01,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-17 02:35:01,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:01,158 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:01,158 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:01,159 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-17 02:35:01,159 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662141826] [2020-09-17 02:35:01,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:35:01,160 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:01,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:35:01,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:35:01,161 INFO L87 Difference]: Start difference. First operand 66 states and 165 transitions. Second operand 17 states. [2020-09-17 02:35:02,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:02,125 INFO L93 Difference]: Finished difference Result 105 states and 245 transitions. [2020-09-17 02:35:02,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-17 02:35:02,127 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-09-17 02:35:02,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:02,128 INFO L225 Difference]: With dead ends: 105 [2020-09-17 02:35:02,128 INFO L226 Difference]: Without dead ends: 99 [2020-09-17 02:35:02,130 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=448, Invalid=1112, Unknown=0, NotChecked=0, Total=1560 [2020-09-17 02:35:02,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-09-17 02:35:02,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 69. [2020-09-17 02:35:02,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-17 02:35:02,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-09-17 02:35:02,143 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 21 [2020-09-17 02:35:02,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:02,149 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-09-17 02:35:02,149 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:35:02,150 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-09-17 02:35:02,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-17 02:35:02,150 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:02,151 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:02,351 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:02,352 INFO L427 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:02,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:02,352 INFO L82 PathProgramCache]: Analyzing trace with hash -1453618946, now seen corresponding path program 104 times [2020-09-17 02:35:02,353 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:02,353 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527716789] [2020-09-17 02:35:02,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:02,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:02,684 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:02,685 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527716789] [2020-09-17 02:35:02,685 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589047238] [2020-09-17 02:35:02,686 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:02,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:35:02,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:02,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-17 02:35:02,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:02,821 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:35:02,844 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:02,844 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:02,844 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-17 02:35:02,845 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463638095] [2020-09-17 02:35:02,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-17 02:35:02,845 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:02,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-17 02:35:02,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-09-17 02:35:02,846 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 18 states. [2020-09-17 02:35:03,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:03,899 INFO L93 Difference]: Finished difference Result 102 states and 239 transitions. [2020-09-17 02:35:03,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-17 02:35:03,900 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-17 02:35:03,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:03,902 INFO L225 Difference]: With dead ends: 102 [2020-09-17 02:35:03,902 INFO L226 Difference]: Without dead ends: 96 [2020-09-17 02:35:03,902 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=457, Invalid=1183, Unknown=0, NotChecked=0, Total=1640 [2020-09-17 02:35:03,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-09-17 02:35:03,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 68. [2020-09-17 02:35:03,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-17 02:35:03,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-09-17 02:35:03,905 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 21 [2020-09-17 02:35:03,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:03,905 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-09-17 02:35:03,906 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-17 02:35:03,906 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-09-17 02:35:03,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-17 02:35:03,906 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:03,906 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:04,117 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2020-09-17 02:35:04,118 INFO L427 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:04,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:04,118 INFO L82 PathProgramCache]: Analyzing trace with hash -982623236, now seen corresponding path program 105 times [2020-09-17 02:35:04,119 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:04,119 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970551709] [2020-09-17 02:35:04,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:04,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:04,362 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:04,362 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970551709] [2020-09-17 02:35:04,362 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821012341] [2020-09-17 02:35:04,363 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 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:04,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-09-17 02:35:04,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:04,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-17 02:35:04,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:04,458 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:04,459 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:04,459 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-17 02:35:04,459 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304372893] [2020-09-17 02:35:04,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:35:04,460 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:04,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:35:04,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:35:04,461 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 17 states. [2020-09-17 02:35:05,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:05,337 INFO L93 Difference]: Finished difference Result 103 states and 243 transitions. [2020-09-17 02:35:05,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-17 02:35:05,338 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-09-17 02:35:05,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:05,339 INFO L225 Difference]: With dead ends: 103 [2020-09-17 02:35:05,339 INFO L226 Difference]: Without dead ends: 97 [2020-09-17 02:35:05,340 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=522, Invalid=1200, Unknown=0, NotChecked=0, Total=1722 [2020-09-17 02:35:05,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-09-17 02:35:05,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 71. [2020-09-17 02:35:05,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-17 02:35:05,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 179 transitions. [2020-09-17 02:35:05,343 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 179 transitions. Word has length 21 [2020-09-17 02:35:05,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:05,344 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 179 transitions. [2020-09-17 02:35:05,344 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:35:05,344 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 179 transitions. [2020-09-17 02:35:05,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-17 02:35:05,344 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:05,344 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:05,545 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:05,545 INFO L427 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:05,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:05,546 INFO L82 PathProgramCache]: Analyzing trace with hash -966536096, now seen corresponding path program 106 times [2020-09-17 02:35:05,546 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:05,547 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12036592] [2020-09-17 02:35:05,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:05,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:05,779 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:05,780 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12036592] [2020-09-17 02:35:05,780 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960774277] [2020-09-17 02:35:05,780 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 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:05,842 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:35:05,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:05,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-17 02:35:05,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:05,872 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:35:05,889 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:05,890 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:05,891 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-17 02:35:05,891 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748007737] [2020-09-17 02:35:05,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-17 02:35:05,892 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:05,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-17 02:35:05,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-09-17 02:35:05,892 INFO L87 Difference]: Start difference. First operand 71 states and 179 transitions. Second operand 18 states. [2020-09-17 02:35:06,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:06,912 INFO L93 Difference]: Finished difference Result 100 states and 237 transitions. [2020-09-17 02:35:06,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-17 02:35:06,913 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-17 02:35:06,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:06,914 INFO L225 Difference]: With dead ends: 100 [2020-09-17 02:35:06,914 INFO L226 Difference]: Without dead ends: 94 [2020-09-17 02:35:06,915 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=532, Invalid=1274, Unknown=0, NotChecked=0, Total=1806 [2020-09-17 02:35:06,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-09-17 02:35:06,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 70. [2020-09-17 02:35:06,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-17 02:35:06,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 177 transitions. [2020-09-17 02:35:06,918 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 177 transitions. Word has length 21 [2020-09-17 02:35:06,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:06,918 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 177 transitions. [2020-09-17 02:35:06,918 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-17 02:35:06,919 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 177 transitions. [2020-09-17 02:35:06,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-17 02:35:06,919 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:06,919 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:07,119 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2020-09-17 02:35:07,120 INFO L427 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:07,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:07,121 INFO L82 PathProgramCache]: Analyzing trace with hash -966045986, now seen corresponding path program 107 times [2020-09-17 02:35:07,121 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:07,121 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628144041] [2020-09-17 02:35:07,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:07,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:07,358 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:07,358 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628144041] [2020-09-17 02:35:07,359 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66278663] [2020-09-17 02:35:07,359 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 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:07,453 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-09-17 02:35:07,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:07,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-17 02:35:07,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:07,500 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:07,501 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:07,502 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-17 02:35:07,502 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465302776] [2020-09-17 02:35:07,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:35:07,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:07,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:35:07,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:35:07,504 INFO L87 Difference]: Start difference. First operand 70 states and 177 transitions. Second operand 17 states. [2020-09-17 02:35:08,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:08,520 INFO L93 Difference]: Finished difference Result 120 states and 287 transitions. [2020-09-17 02:35:08,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-17 02:35:08,521 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-09-17 02:35:08,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:08,522 INFO L225 Difference]: With dead ends: 120 [2020-09-17 02:35:08,522 INFO L226 Difference]: Without dead ends: 114 [2020-09-17 02:35:08,523 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=612, Invalid=1280, Unknown=0, NotChecked=0, Total=1892 [2020-09-17 02:35:08,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-09-17 02:35:08,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 76. [2020-09-17 02:35:08,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-17 02:35:08,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 197 transitions. [2020-09-17 02:35:08,532 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 197 transitions. Word has length 21 [2020-09-17 02:35:08,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:08,532 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 197 transitions. [2020-09-17 02:35:08,532 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:35:08,533 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 197 transitions. [2020-09-17 02:35:08,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-17 02:35:08,533 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:08,533 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:08,740 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2020-09-17 02:35:08,741 INFO L427 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:08,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:08,741 INFO L82 PathProgramCache]: Analyzing trace with hash -966029246, now seen corresponding path program 108 times [2020-09-17 02:35:08,742 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:08,742 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685245860] [2020-09-17 02:35:08,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:08,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:09,059 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:09,060 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685245860] [2020-09-17 02:35:09,060 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376761178] [2020-09-17 02:35:09,060 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 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:09,147 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-17 02:35:09,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:09,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-17 02:35:09,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:09,197 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:35:09,226 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:09,227 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:09,227 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-17 02:35:09,228 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731447178] [2020-09-17 02:35:09,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-17 02:35:09,228 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:09,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-17 02:35:09,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-09-17 02:35:09,230 INFO L87 Difference]: Start difference. First operand 76 states and 197 transitions. Second operand 18 states. [2020-09-17 02:35:10,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:10,539 INFO L93 Difference]: Finished difference Result 101 states and 243 transitions. [2020-09-17 02:35:10,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-17 02:35:10,541 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-17 02:35:10,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:10,542 INFO L225 Difference]: With dead ends: 101 [2020-09-17 02:35:10,542 INFO L226 Difference]: Without dead ends: 93 [2020-09-17 02:35:10,543 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=623, Invalid=1357, Unknown=0, NotChecked=0, Total=1980 [2020-09-17 02:35:10,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-17 02:35:10,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 73. [2020-09-17 02:35:10,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-09-17 02:35:10,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 185 transitions. [2020-09-17 02:35:10,547 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 185 transitions. Word has length 21 [2020-09-17 02:35:10,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:10,547 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 185 transitions. [2020-09-17 02:35:10,547 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-17 02:35:10,547 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 185 transitions. [2020-09-17 02:35:10,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-17 02:35:10,548 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:10,548 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:10,751 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:10,751 INFO L427 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:10,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:10,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1728807741, now seen corresponding path program 109 times [2020-09-17 02:35:10,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:10,752 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191411125] [2020-09-17 02:35:10,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:10,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:11,096 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:11,097 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191411125] [2020-09-17 02:35:11,097 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95925846] [2020-09-17 02:35:11,098 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 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:11,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:11,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-17 02:35:11,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:11,182 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:11,183 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:11,183 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-17 02:35:11,183 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049671580] [2020-09-17 02:35:11,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-17 02:35:11,184 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:11,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-17 02:35:11,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-09-17 02:35:11,184 INFO L87 Difference]: Start difference. First operand 73 states and 185 transitions. Second operand 18 states. [2020-09-17 02:35:11,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:11,756 INFO L93 Difference]: Finished difference Result 114 states and 267 transitions. [2020-09-17 02:35:11,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-17 02:35:11,757 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-09-17 02:35:11,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:11,758 INFO L225 Difference]: With dead ends: 114 [2020-09-17 02:35:11,758 INFO L226 Difference]: Without dead ends: 108 [2020-09-17 02:35:11,758 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=321, Invalid=735, Unknown=0, NotChecked=0, Total=1056 [2020-09-17 02:35:11,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-09-17 02:35:11,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 75. [2020-09-17 02:35:11,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-17 02:35:11,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-09-17 02:35:11,761 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-09-17 02:35:11,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:11,761 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-09-17 02:35:11,762 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-17 02:35:11,762 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-09-17 02:35:11,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-17 02:35:11,762 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:11,762 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:11,964 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:11,965 INFO L427 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:11,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:11,965 INFO L82 PathProgramCache]: Analyzing trace with hash -689910111, now seen corresponding path program 110 times [2020-09-17 02:35:11,966 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:11,966 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032699570] [2020-09-17 02:35:11,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:11,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:12,296 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:12,297 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032699570] [2020-09-17 02:35:12,297 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037923482] [2020-09-17 02:35:12,297 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 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:12,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:35:12,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:12,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-17 02:35:12,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:12,402 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:35:12,417 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:12,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:12,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-17 02:35:12,418 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658806158] [2020-09-17 02:35:12,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-17 02:35:12,419 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:12,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-17 02:35:12,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-09-17 02:35:12,419 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-09-17 02:35:13,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:13,097 INFO L93 Difference]: Finished difference Result 111 states and 261 transitions. [2020-09-17 02:35:13,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-17 02:35:13,097 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-17 02:35:13,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:13,098 INFO L225 Difference]: With dead ends: 111 [2020-09-17 02:35:13,098 INFO L226 Difference]: Without dead ends: 105 [2020-09-17 02:35:13,099 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=362, Invalid=898, Unknown=0, NotChecked=0, Total=1260 [2020-09-17 02:35:13,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-09-17 02:35:13,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 74. [2020-09-17 02:35:13,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-17 02:35:13,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-09-17 02:35:13,101 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-09-17 02:35:13,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:13,101 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-09-17 02:35:13,101 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-17 02:35:13,101 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-09-17 02:35:13,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-17 02:35:13,102 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:13,102 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:13,302 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2020-09-17 02:35:13,303 INFO L427 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:13,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:13,304 INFO L82 PathProgramCache]: Analyzing trace with hash -1588321, now seen corresponding path program 111 times [2020-09-17 02:35:13,304 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:13,304 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327585516] [2020-09-17 02:35:13,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:13,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:13,598 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:13,599 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327585516] [2020-09-17 02:35:13,599 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964708500] [2020-09-17 02:35:13,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:13,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-09-17 02:35:13,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:13,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-17 02:35:13,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:13,686 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:13,687 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:13,687 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-17 02:35:13,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225561883] [2020-09-17 02:35:13,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-17 02:35:13,688 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:13,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-17 02:35:13,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-09-17 02:35:13,688 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-09-17 02:35:14,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:14,302 INFO L93 Difference]: Finished difference Result 108 states and 255 transitions. [2020-09-17 02:35:14,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-17 02:35:14,303 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-09-17 02:35:14,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:14,304 INFO L225 Difference]: With dead ends: 108 [2020-09-17 02:35:14,304 INFO L226 Difference]: Without dead ends: 102 [2020-09-17 02:35:14,305 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=332, Invalid=858, Unknown=0, NotChecked=0, Total=1190 [2020-09-17 02:35:14,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-09-17 02:35:14,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 75. [2020-09-17 02:35:14,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-17 02:35:14,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-09-17 02:35:14,308 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-09-17 02:35:14,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:14,309 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-09-17 02:35:14,309 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-17 02:35:14,309 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-09-17 02:35:14,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-17 02:35:14,309 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:14,310 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:14,519 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:14,520 INFO L427 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:14,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:14,521 INFO L82 PathProgramCache]: Analyzing trace with hash 983603203, now seen corresponding path program 112 times [2020-09-17 02:35:14,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:14,521 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297253808] [2020-09-17 02:35:14,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:14,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:14,831 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:14,832 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297253808] [2020-09-17 02:35:14,832 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496463093] [2020-09-17 02:35:14,832 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 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:14,899 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:35:14,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:14,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-17 02:35:14,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:14,950 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:35:14,965 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:14,966 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:14,966 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-17 02:35:14,967 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159087165] [2020-09-17 02:35:14,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-17 02:35:14,967 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:14,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-17 02:35:14,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-09-17 02:35:14,968 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-09-17 02:35:15,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:15,686 INFO L93 Difference]: Finished difference Result 107 states and 253 transitions. [2020-09-17 02:35:15,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-17 02:35:15,687 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-17 02:35:15,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:15,688 INFO L225 Difference]: With dead ends: 107 [2020-09-17 02:35:15,688 INFO L226 Difference]: Without dead ends: 101 [2020-09-17 02:35:15,688 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=380, Invalid=1026, Unknown=0, NotChecked=0, Total=1406 [2020-09-17 02:35:15,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-17 02:35:15,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 74. [2020-09-17 02:35:15,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-17 02:35:15,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-09-17 02:35:15,693 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-09-17 02:35:15,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:15,694 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-09-17 02:35:15,694 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-17 02:35:15,694 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-09-17 02:35:15,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-17 02:35:15,694 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:15,695 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:15,895 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2020-09-17 02:35:15,896 INFO L427 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:15,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:15,896 INFO L82 PathProgramCache]: Analyzing trace with hash -633555839, now seen corresponding path program 113 times [2020-09-17 02:35:15,897 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:15,897 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853460003] [2020-09-17 02:35:15,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:15,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:16,179 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:16,180 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853460003] [2020-09-17 02:35:16,180 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611709548] [2020-09-17 02:35:16,180 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 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:16,245 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-09-17 02:35:16,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:16,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-17 02:35:16,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:16,268 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:16,268 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:16,269 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-17 02:35:16,269 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020243121] [2020-09-17 02:35:16,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-17 02:35:16,270 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:16,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-17 02:35:16,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-09-17 02:35:16,270 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-09-17 02:35:16,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:16,992 INFO L93 Difference]: Finished difference Result 104 states and 247 transitions. [2020-09-17 02:35:16,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-17 02:35:16,994 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-09-17 02:35:16,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:16,994 INFO L225 Difference]: With dead ends: 104 [2020-09-17 02:35:16,995 INFO L226 Difference]: Without dead ends: 98 [2020-09-17 02:35:16,996 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=359, Invalid=973, Unknown=0, NotChecked=0, Total=1332 [2020-09-17 02:35:16,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-17 02:35:16,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 75. [2020-09-17 02:35:16,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-17 02:35:16,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-09-17 02:35:16,999 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-09-17 02:35:16,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:17,000 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-09-17 02:35:17,000 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-17 02:35:17,000 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-09-17 02:35:17,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-17 02:35:17,000 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:17,001 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:17,209 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2020-09-17 02:35:17,210 INFO L427 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:17,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:17,210 INFO L82 PathProgramCache]: Analyzing trace with hash 623333861, now seen corresponding path program 114 times [2020-09-17 02:35:17,211 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:17,211 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934826573] [2020-09-17 02:35:17,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:17,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:17,524 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:17,525 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934826573] [2020-09-17 02:35:17,525 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322586556] [2020-09-17 02:35:17,525 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 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:17,600 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-17 02:35:17,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:17,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-17 02:35:17,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:17,634 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:35:17,653 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:17,653 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:17,653 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-17 02:35:17,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216882818] [2020-09-17 02:35:17,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-17 02:35:17,654 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:17,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-17 02:35:17,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2020-09-17 02:35:17,655 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-09-17 02:35:18,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:18,612 INFO L93 Difference]: Finished difference Result 103 states and 245 transitions. [2020-09-17 02:35:18,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-17 02:35:18,613 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-17 02:35:18,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:18,614 INFO L225 Difference]: With dead ends: 103 [2020-09-17 02:35:18,615 INFO L226 Difference]: Without dead ends: 97 [2020-09-17 02:35:18,616 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=414, Invalid=1146, Unknown=0, NotChecked=0, Total=1560 [2020-09-17 02:35:18,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-09-17 02:35:18,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 74. [2020-09-17 02:35:18,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-17 02:35:18,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-09-17 02:35:18,619 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-09-17 02:35:18,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:18,619 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-09-17 02:35:18,619 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-17 02:35:18,619 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-09-17 02:35:18,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-17 02:35:18,620 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:18,620 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:18,828 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2020-09-17 02:35:18,829 INFO L427 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:18,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:18,829 INFO L82 PathProgramCache]: Analyzing trace with hash -2055440925, now seen corresponding path program 115 times [2020-09-17 02:35:18,830 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:18,830 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052367339] [2020-09-17 02:35:18,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:18,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:19,130 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:19,130 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052367339] [2020-09-17 02:35:19,131 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964152539] [2020-09-17 02:35:19,131 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 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:19,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:19,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-17 02:35:19,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:19,222 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:19,222 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:19,222 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-17 02:35:19,223 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665200552] [2020-09-17 02:35:19,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-17 02:35:19,223 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:19,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-17 02:35:19,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-09-17 02:35:19,224 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-09-17 02:35:20,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:20,019 INFO L93 Difference]: Finished difference Result 100 states and 239 transitions. [2020-09-17 02:35:20,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-17 02:35:20,020 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-09-17 02:35:20,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:20,021 INFO L225 Difference]: With dead ends: 100 [2020-09-17 02:35:20,021 INFO L226 Difference]: Without dead ends: 94 [2020-09-17 02:35:20,022 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=402, Invalid=1080, Unknown=0, NotChecked=0, Total=1482 [2020-09-17 02:35:20,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-09-17 02:35:20,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 75. [2020-09-17 02:35:20,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-17 02:35:20,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-09-17 02:35:20,025 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-09-17 02:35:20,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:20,025 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-09-17 02:35:20,025 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-17 02:35:20,025 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-09-17 02:35:20,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-17 02:35:20,026 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:20,026 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:20,232 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:20,233 INFO L427 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:20,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:20,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1535697849, now seen corresponding path program 116 times [2020-09-17 02:35:20,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:20,234 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199139092] [2020-09-17 02:35:20,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:20,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:20,532 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:20,533 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199139092] [2020-09-17 02:35:20,533 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171106411] [2020-09-17 02:35:20,534 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 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:20,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:35:20,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:20,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-17 02:35:20,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:20,638 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:35:20,657 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:20,657 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:20,658 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-17 02:35:20,658 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403865146] [2020-09-17 02:35:20,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-17 02:35:20,659 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:20,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-17 02:35:20,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2020-09-17 02:35:20,659 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-09-17 02:35:21,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:21,766 INFO L93 Difference]: Finished difference Result 99 states and 237 transitions. [2020-09-17 02:35:21,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-17 02:35:21,768 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-17 02:35:21,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:21,769 INFO L225 Difference]: With dead ends: 99 [2020-09-17 02:35:21,769 INFO L226 Difference]: Without dead ends: 93 [2020-09-17 02:35:21,769 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=464, Invalid=1258, Unknown=0, NotChecked=0, Total=1722 [2020-09-17 02:35:21,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-17 02:35:21,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 74. [2020-09-17 02:35:21,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-17 02:35:21,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-09-17 02:35:21,772 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-09-17 02:35:21,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:21,772 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-09-17 02:35:21,772 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-17 02:35:21,773 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-09-17 02:35:21,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-17 02:35:21,773 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:21,773 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:21,973 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2020-09-17 02:35:21,974 INFO L427 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:21,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:21,975 INFO L82 PathProgramCache]: Analyzing trace with hash 119613381, now seen corresponding path program 117 times [2020-09-17 02:35:21,975 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:21,976 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416887351] [2020-09-17 02:35:21,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:21,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:22,269 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:22,270 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416887351] [2020-09-17 02:35:22,270 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948679466] [2020-09-17 02:35:22,270 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 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:22,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-09-17 02:35:22,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:22,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-17 02:35:22,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:22,371 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:22,372 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:22,372 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-17 02:35:22,372 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336647157] [2020-09-17 02:35:22,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-17 02:35:22,372 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:22,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-17 02:35:22,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-09-17 02:35:22,373 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-09-17 02:35:23,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:23,311 INFO L93 Difference]: Finished difference Result 96 states and 231 transitions. [2020-09-17 02:35:23,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-17 02:35:23,312 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-09-17 02:35:23,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:23,313 INFO L225 Difference]: With dead ends: 96 [2020-09-17 02:35:23,313 INFO L226 Difference]: Without dead ends: 90 [2020-09-17 02:35:23,314 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=461, Invalid=1179, Unknown=0, NotChecked=0, Total=1640 [2020-09-17 02:35:23,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-17 02:35:23,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 75. [2020-09-17 02:35:23,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-17 02:35:23,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-09-17 02:35:23,317 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-09-17 02:35:23,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:23,317 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-09-17 02:35:23,317 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-17 02:35:23,317 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-09-17 02:35:23,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-17 02:35:23,318 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:23,318 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:23,522 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:23,523 INFO L427 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:23,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:23,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1600514263, now seen corresponding path program 118 times [2020-09-17 02:35:23,524 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:23,524 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544382040] [2020-09-17 02:35:23,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:23,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:23,799 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:23,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544382040] [2020-09-17 02:35:23,800 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557148520] [2020-09-17 02:35:23,800 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 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:23,866 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:35:23,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:23,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-17 02:35:23,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:23,902 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:35:23,923 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:23,924 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:23,924 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-17 02:35:23,924 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485794367] [2020-09-17 02:35:23,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-17 02:35:23,925 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:23,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-17 02:35:23,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2020-09-17 02:35:23,925 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-09-17 02:35:25,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:25,026 INFO L93 Difference]: Finished difference Result 95 states and 229 transitions. [2020-09-17 02:35:25,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-17 02:35:25,027 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-17 02:35:25,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:25,028 INFO L225 Difference]: With dead ends: 95 [2020-09-17 02:35:25,028 INFO L226 Difference]: Without dead ends: 89 [2020-09-17 02:35:25,029 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=530, Invalid=1362, Unknown=0, NotChecked=0, Total=1892 [2020-09-17 02:35:25,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-09-17 02:35:25,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 74. [2020-09-17 02:35:25,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-17 02:35:25,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-09-17 02:35:25,031 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-09-17 02:35:25,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:25,031 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-09-17 02:35:25,031 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-17 02:35:25,031 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-09-17 02:35:25,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-17 02:35:25,031 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:25,032 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:25,232 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:25,233 INFO L427 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:25,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:25,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1129518553, now seen corresponding path program 119 times [2020-09-17 02:35:25,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:25,234 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753087764] [2020-09-17 02:35:25,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:25,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:25,493 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:25,494 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753087764] [2020-09-17 02:35:25,494 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391906497] [2020-09-17 02:35:25,494 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 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:25,580 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-09-17 02:35:25,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:25,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-17 02:35:25,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:25,622 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:25,622 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:25,623 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-17 02:35:25,623 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352548751] [2020-09-17 02:35:25,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-17 02:35:25,624 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:25,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-17 02:35:25,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-09-17 02:35:25,625 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-09-17 02:35:26,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:26,374 INFO L93 Difference]: Finished difference Result 92 states and 223 transitions. [2020-09-17 02:35:26,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-17 02:35:26,375 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-09-17 02:35:26,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:26,375 INFO L225 Difference]: With dead ends: 92 [2020-09-17 02:35:26,375 INFO L226 Difference]: Without dead ends: 86 [2020-09-17 02:35:26,376 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=536, Invalid=1270, Unknown=0, NotChecked=0, Total=1806 [2020-09-17 02:35:26,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-09-17 02:35:26,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 75. [2020-09-17 02:35:26,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-17 02:35:26,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-09-17 02:35:26,378 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-09-17 02:35:26,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:26,379 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-09-17 02:35:26,379 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-17 02:35:26,379 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-09-17 02:35:26,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-17 02:35:26,379 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:26,379 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:26,588 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:26,588 INFO L427 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:26,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:26,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1113431413, now seen corresponding path program 120 times [2020-09-17 02:35:26,589 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:26,589 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922101143] [2020-09-17 02:35:26,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:26,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:26,793 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:26,794 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922101143] [2020-09-17 02:35:26,794 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237195377] [2020-09-17 02:35:26,794 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:26,856 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-17 02:35:26,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:26,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-17 02:35:26,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:26,885 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:35:26,904 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:26,905 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:26,905 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-17 02:35:26,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186121988] [2020-09-17 02:35:26,905 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-17 02:35:26,905 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:26,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-17 02:35:26,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2020-09-17 02:35:26,906 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-09-17 02:35:27,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:27,986 INFO L93 Difference]: Finished difference Result 91 states and 221 transitions. [2020-09-17 02:35:27,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-17 02:35:27,986 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-17 02:35:27,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:27,987 INFO L225 Difference]: With dead ends: 91 [2020-09-17 02:35:27,987 INFO L226 Difference]: Without dead ends: 85 [2020-09-17 02:35:27,988 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=612, Invalid=1458, Unknown=0, NotChecked=0, Total=2070 [2020-09-17 02:35:27,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-17 02:35:27,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 74. [2020-09-17 02:35:27,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-17 02:35:27,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-09-17 02:35:27,990 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-09-17 02:35:27,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:27,991 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-09-17 02:35:27,991 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-17 02:35:27,991 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-09-17 02:35:27,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-17 02:35:27,991 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:27,991 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:28,192 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:28,192 INFO L427 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:28,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:28,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1112941303, now seen corresponding path program 121 times [2020-09-17 02:35:28,193 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:28,193 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820858372] [2020-09-17 02:35:28,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:28,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:28,445 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:28,446 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820858372] [2020-09-17 02:35:28,446 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710792845] [2020-09-17 02:35:28,446 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 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:28,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:28,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-17 02:35:28,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:28,549 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:28,550 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:28,550 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-17 02:35:28,550 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461916799] [2020-09-17 02:35:28,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-17 02:35:28,551 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:28,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-17 02:35:28,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-09-17 02:35:28,552 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-09-17 02:35:29,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:29,400 INFO L93 Difference]: Finished difference Result 107 states and 261 transitions. [2020-09-17 02:35:29,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-17 02:35:29,401 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-09-17 02:35:29,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:29,402 INFO L225 Difference]: With dead ends: 107 [2020-09-17 02:35:29,402 INFO L226 Difference]: Without dead ends: 101 [2020-09-17 02:35:29,403 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=627, Invalid=1353, Unknown=0, NotChecked=0, Total=1980 [2020-09-17 02:35:29,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-17 02:35:29,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 78. [2020-09-17 02:35:29,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-17 02:35:29,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 201 transitions. [2020-09-17 02:35:29,409 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 201 transitions. Word has length 22 [2020-09-17 02:35:29,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:29,410 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 201 transitions. [2020-09-17 02:35:29,410 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-17 02:35:29,410 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 201 transitions. [2020-09-17 02:35:29,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-17 02:35:29,410 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:29,410 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:29,619 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2020-09-17 02:35:29,619 INFO L427 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:29,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:29,620 INFO L82 PathProgramCache]: Analyzing trace with hash -1112924563, now seen corresponding path program 122 times [2020-09-17 02:35:29,620 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:29,620 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564546490] [2020-09-17 02:35:29,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:29,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:29,847 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:29,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564546490] [2020-09-17 02:35:29,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037287822] [2020-09-17 02:35:29,848 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 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:29,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:35:29,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:29,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-17 02:35:29,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:29,938 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:35:29,955 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:29,955 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:29,955 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-17 02:35:29,956 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998919970] [2020-09-17 02:35:29,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-17 02:35:29,956 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:29,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-17 02:35:29,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-09-17 02:35:29,957 INFO L87 Difference]: Start difference. First operand 78 states and 201 transitions. Second operand 19 states. [2020-09-17 02:35:31,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:31,084 INFO L93 Difference]: Finished difference Result 88 states and 217 transitions. [2020-09-17 02:35:31,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-17 02:35:31,084 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-17 02:35:31,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:31,085 INFO L225 Difference]: With dead ends: 88 [2020-09-17 02:35:31,085 INFO L226 Difference]: Without dead ends: 80 [2020-09-17 02:35:31,086 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=710, Invalid=1546, Unknown=0, NotChecked=0, Total=2256 [2020-09-17 02:35:31,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-17 02:35:31,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 57. [2020-09-17 02:35:31,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-17 02:35:31,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 138 transitions. [2020-09-17 02:35:31,087 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 138 transitions. Word has length 22 [2020-09-17 02:35:31,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:31,087 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 138 transitions. [2020-09-17 02:35:31,088 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-17 02:35:31,088 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 138 transitions. [2020-09-17 02:35:31,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-17 02:35:31,088 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:31,088 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:31,296 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2020-09-17 02:35:31,296 INFO L427 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:31,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:31,297 INFO L82 PathProgramCache]: Analyzing trace with hash 117880753, now seen corresponding path program 123 times [2020-09-17 02:35:31,297 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:31,297 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176573207] [2020-09-17 02:35:31,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:31,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:31,520 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:31,520 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176573207] [2020-09-17 02:35:31,520 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854051700] [2020-09-17 02:35:31,520 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 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:31,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-09-17 02:35:31,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:31,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-17 02:35:31,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:31,616 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:35:31,636 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:31,636 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:31,637 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-17 02:35:31,637 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490985714] [2020-09-17 02:35:31,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-17 02:35:31,637 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:31,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-17 02:35:31,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-09-17 02:35:31,638 INFO L87 Difference]: Start difference. First operand 57 states and 138 transitions. Second operand 19 states. [2020-09-17 02:35:32,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:32,700 INFO L93 Difference]: Finished difference Result 100 states and 243 transitions. [2020-09-17 02:35:32,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-17 02:35:32,701 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-17 02:35:32,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:32,702 INFO L225 Difference]: With dead ends: 100 [2020-09-17 02:35:32,702 INFO L226 Difference]: Without dead ends: 95 [2020-09-17 02:35:32,703 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=745, Invalid=1511, Unknown=0, NotChecked=0, Total=2256 [2020-09-17 02:35:32,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-09-17 02:35:32,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 76. [2020-09-17 02:35:32,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-17 02:35:32,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 193 transitions. [2020-09-17 02:35:32,705 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 193 transitions. Word has length 22 [2020-09-17 02:35:32,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:32,705 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 193 transitions. [2020-09-17 02:35:32,705 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-17 02:35:32,706 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 193 transitions. [2020-09-17 02:35:32,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-17 02:35:32,706 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:32,706 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:32,908 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2020-09-17 02:35:32,908 INFO L427 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:32,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:32,909 INFO L82 PathProgramCache]: Analyzing trace with hash -140906778, now seen corresponding path program 124 times [2020-09-17 02:35:32,909 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:32,909 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957468429] [2020-09-17 02:35:32,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:32,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:33,156 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:33,157 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957468429] [2020-09-17 02:35:33,157 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485240944] [2020-09-17 02:35:33,157 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 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:33,217 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:35:33,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:33,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-17 02:35:33,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:33,246 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:35:33,268 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:33,269 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:33,269 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-17 02:35:33,269 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427239823] [2020-09-17 02:35:33,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-17 02:35:33,270 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:33,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-17 02:35:33,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:35:33,270 INFO L87 Difference]: Start difference. First operand 76 states and 193 transitions. Second operand 20 states. [2020-09-17 02:35:34,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:34,383 INFO L93 Difference]: Finished difference Result 84 states and 213 transitions. [2020-09-17 02:35:34,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-17 02:35:34,384 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-17 02:35:34,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:34,385 INFO L225 Difference]: With dead ends: 84 [2020-09-17 02:35:34,385 INFO L226 Difference]: Without dead ends: 79 [2020-09-17 02:35:34,385 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=761, Invalid=1591, Unknown=0, NotChecked=0, Total=2352 [2020-09-17 02:35:34,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-09-17 02:35:34,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 58. [2020-09-17 02:35:34,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-17 02:35:34,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 142 transitions. [2020-09-17 02:35:34,388 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 142 transitions. Word has length 23 [2020-09-17 02:35:34,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:34,388 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 142 transitions. [2020-09-17 02:35:34,388 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-17 02:35:34,388 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 142 transitions. [2020-09-17 02:35:34,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-17 02:35:34,389 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:34,389 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:34,594 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2020-09-17 02:35:34,594 INFO L427 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:34,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:34,595 INFO L82 PathProgramCache]: Analyzing trace with hash -1335609647, now seen corresponding path program 125 times [2020-09-17 02:35:34,595 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:34,595 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351127768] [2020-09-17 02:35:34,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:34,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:34,921 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:34,921 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351127768] [2020-09-17 02:35:34,922 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391468888] [2020-09-17 02:35:34,922 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 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:34,988 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-09-17 02:35:34,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:34,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-17 02:35:34,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:35,000 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:35,000 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:35,000 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-17 02:35:35,000 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136498255] [2020-09-17 02:35:35,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-17 02:35:35,001 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:35,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-17 02:35:35,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-09-17 02:35:35,001 INFO L87 Difference]: Start difference. First operand 58 states and 142 transitions. Second operand 19 states. [2020-09-17 02:35:35,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:35,489 INFO L93 Difference]: Finished difference Result 90 states and 209 transitions. [2020-09-17 02:35:35,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-17 02:35:35,490 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-17 02:35:35,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:35,490 INFO L225 Difference]: With dead ends: 90 [2020-09-17 02:35:35,491 INFO L226 Difference]: Without dead ends: 84 [2020-09-17 02:35:35,491 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=363, Invalid=759, Unknown=0, NotChecked=0, Total=1122 [2020-09-17 02:35:35,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-09-17 02:35:35,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 66. [2020-09-17 02:35:35,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-17 02:35:35,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 161 transitions. [2020-09-17 02:35:35,493 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 161 transitions. Word has length 23 [2020-09-17 02:35:35,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:35,494 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 161 transitions. [2020-09-17 02:35:35,494 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-17 02:35:35,494 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 161 transitions. [2020-09-17 02:35:35,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-17 02:35:35,495 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:35,495 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:35,698 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:35,699 INFO L427 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:35,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:35,700 INFO L82 PathProgramCache]: Analyzing trace with hash -2146158283, now seen corresponding path program 126 times [2020-09-17 02:35:35,702 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:35,702 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454246741] [2020-09-17 02:35:35,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:35,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:36,011 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:36,012 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454246741] [2020-09-17 02:35:36,012 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796003138] [2020-09-17 02:35:36,012 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 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:36,076 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-09-17 02:35:36,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:36,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-17 02:35:36,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:36,107 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:35:36,117 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:36,118 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:36,118 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-17 02:35:36,118 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577085994] [2020-09-17 02:35:36,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-17 02:35:36,119 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:36,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-17 02:35:36,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:35:36,119 INFO L87 Difference]: Start difference. First operand 66 states and 161 transitions. Second operand 20 states. [2020-09-17 02:35:36,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:36,688 INFO L93 Difference]: Finished difference Result 106 states and 241 transitions. [2020-09-17 02:35:36,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-17 02:35:36,689 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-17 02:35:36,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:36,690 INFO L225 Difference]: With dead ends: 106 [2020-09-17 02:35:36,690 INFO L226 Difference]: Without dead ends: 100 [2020-09-17 02:35:36,691 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=372, Invalid=888, Unknown=0, NotChecked=0, Total=1260 [2020-09-17 02:35:36,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-17 02:35:36,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 64. [2020-09-17 02:35:36,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-17 02:35:36,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 157 transitions. [2020-09-17 02:35:36,693 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 157 transitions. Word has length 23 [2020-09-17 02:35:36,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:36,693 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 157 transitions. [2020-09-17 02:35:36,694 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-17 02:35:36,694 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 157 transitions. [2020-09-17 02:35:36,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-17 02:35:36,694 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:36,694 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:36,897 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2020-09-17 02:35:36,898 INFO L427 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:36,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:36,898 INFO L82 PathProgramCache]: Analyzing trace with hash -2093881677, now seen corresponding path program 127 times [2020-09-17 02:35:36,899 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:36,899 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646401495] [2020-09-17 02:35:36,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:36,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:37,210 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:37,211 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646401495] [2020-09-17 02:35:37,211 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072519883] [2020-09-17 02:35:37,211 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 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:37,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:37,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-17 02:35:37,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:37,286 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:37,286 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:37,286 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-17 02:35:37,287 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950874527] [2020-09-17 02:35:37,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-17 02:35:37,287 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:37,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-17 02:35:37,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2020-09-17 02:35:37,288 INFO L87 Difference]: Start difference. First operand 64 states and 157 transitions. Second operand 19 states. [2020-09-17 02:35:37,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:37,890 INFO L93 Difference]: Finished difference Result 107 states and 245 transitions. [2020-09-17 02:35:37,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-17 02:35:37,891 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-17 02:35:37,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:37,891 INFO L225 Difference]: With dead ends: 107 [2020-09-17 02:35:37,891 INFO L226 Difference]: Without dead ends: 101 [2020-09-17 02:35:37,892 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=377, Invalid=955, Unknown=0, NotChecked=0, Total=1332 [2020-09-17 02:35:37,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-17 02:35:37,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 67. [2020-09-17 02:35:37,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-09-17 02:35:37,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 165 transitions. [2020-09-17 02:35:37,895 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 165 transitions. Word has length 23 [2020-09-17 02:35:37,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:37,895 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 165 transitions. [2020-09-17 02:35:37,895 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-17 02:35:37,895 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 165 transitions. [2020-09-17 02:35:37,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-17 02:35:37,896 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:37,896 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:38,104 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2020-09-17 02:35:38,104 INFO L427 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:38,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:38,105 INFO L82 PathProgramCache]: Analyzing trace with hash -217632233, now seen corresponding path program 128 times [2020-09-17 02:35:38,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:38,105 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458302162] [2020-09-17 02:35:38,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:38,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:38,415 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:38,416 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458302162] [2020-09-17 02:35:38,416 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920888977] [2020-09-17 02:35:38,416 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 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:38,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:35:38,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:38,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-17 02:35:38,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:38,507 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:35:38,521 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:38,522 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:38,522 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-17 02:35:38,522 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513222092] [2020-09-17 02:35:38,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-17 02:35:38,522 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:38,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-17 02:35:38,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:35:38,523 INFO L87 Difference]: Start difference. First operand 67 states and 165 transitions. Second operand 20 states. [2020-09-17 02:35:39,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:39,174 INFO L93 Difference]: Finished difference Result 119 states and 269 transitions. [2020-09-17 02:35:39,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-17 02:35:39,175 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-17 02:35:39,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:39,175 INFO L225 Difference]: With dead ends: 119 [2020-09-17 02:35:39,175 INFO L226 Difference]: Without dead ends: 113 [2020-09-17 02:35:39,176 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=409, Invalid=1073, Unknown=0, NotChecked=0, Total=1482 [2020-09-17 02:35:39,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-17 02:35:39,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 66. [2020-09-17 02:35:39,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-17 02:35:39,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 163 transitions. [2020-09-17 02:35:39,178 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 163 transitions. Word has length 23 [2020-09-17 02:35:39,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:39,178 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 163 transitions. [2020-09-17 02:35:39,178 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-17 02:35:39,179 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 163 transitions. [2020-09-17 02:35:39,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-17 02:35:39,179 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:39,179 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:39,379 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2020-09-17 02:35:39,380 INFO L427 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:39,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:39,380 INFO L82 PathProgramCache]: Analyzing trace with hash 470689557, now seen corresponding path program 129 times [2020-09-17 02:35:39,380 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:39,381 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424700820] [2020-09-17 02:35:39,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:39,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:39,676 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:39,676 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424700820] [2020-09-17 02:35:39,676 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168709886] [2020-09-17 02:35:39,677 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 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:39,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-09-17 02:35:39,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:39,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-17 02:35:39,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:39,758 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:39,758 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:39,758 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-17 02:35:39,758 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521155264] [2020-09-17 02:35:39,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-17 02:35:39,759 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:39,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-17 02:35:39,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2020-09-17 02:35:39,759 INFO L87 Difference]: Start difference. First operand 66 states and 163 transitions. Second operand 19 states. [2020-09-17 02:35:40,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:40,433 INFO L93 Difference]: Finished difference Result 119 states and 271 transitions. [2020-09-17 02:35:40,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-17 02:35:40,434 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-17 02:35:40,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:40,435 INFO L225 Difference]: With dead ends: 119 [2020-09-17 02:35:40,435 INFO L226 Difference]: Without dead ends: 113 [2020-09-17 02:35:40,436 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=428, Invalid=1132, Unknown=0, NotChecked=0, Total=1560 [2020-09-17 02:35:40,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-17 02:35:40,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 69. [2020-09-17 02:35:40,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-17 02:35:40,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 171 transitions. [2020-09-17 02:35:40,438 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 171 transitions. Word has length 23 [2020-09-17 02:35:40,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:40,438 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 171 transitions. [2020-09-17 02:35:40,438 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-17 02:35:40,438 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 171 transitions. [2020-09-17 02:35:40,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-17 02:35:40,439 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:40,439 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:40,643 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:40,643 INFO L427 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:40,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:40,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1455881081, now seen corresponding path program 130 times [2020-09-17 02:35:40,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:40,644 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480919917] [2020-09-17 02:35:40,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:40,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:40,936 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:40,936 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480919917] [2020-09-17 02:35:40,936 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451248214] [2020-09-17 02:35:40,937 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 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:40,999 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:35:40,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:41,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-17 02:35:41,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:41,026 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:35:41,041 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:41,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:41,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-17 02:35:41,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808460128] [2020-09-17 02:35:41,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-17 02:35:41,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:41,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-17 02:35:41,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:35:41,042 INFO L87 Difference]: Start difference. First operand 69 states and 171 transitions. Second operand 20 states. [2020-09-17 02:35:41,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:41,799 INFO L93 Difference]: Finished difference Result 116 states and 265 transitions. [2020-09-17 02:35:41,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-17 02:35:41,800 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-17 02:35:41,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:41,801 INFO L225 Difference]: With dead ends: 116 [2020-09-17 02:35:41,801 INFO L226 Difference]: Without dead ends: 110 [2020-09-17 02:35:41,802 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=434, Invalid=1206, Unknown=0, NotChecked=0, Total=1640 [2020-09-17 02:35:41,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-09-17 02:35:41,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 68. [2020-09-17 02:35:41,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-17 02:35:41,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 169 transitions. [2020-09-17 02:35:41,804 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 169 transitions. Word has length 23 [2020-09-17 02:35:41,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:41,804 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 169 transitions. [2020-09-17 02:35:41,804 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-17 02:35:41,805 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 169 transitions. [2020-09-17 02:35:41,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-17 02:35:41,805 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:41,805 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:42,005 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:42,007 INFO L427 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:42,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:42,007 INFO L82 PathProgramCache]: Analyzing trace with hash -161277961, now seen corresponding path program 131 times [2020-09-17 02:35:42,008 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:42,008 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938945555] [2020-09-17 02:35:42,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:42,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:42,246 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:42,247 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938945555] [2020-09-17 02:35:42,247 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488541565] [2020-09-17 02:35:42,247 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 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:42,328 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-09-17 02:35:42,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:42,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-17 02:35:42,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:42,356 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:42,358 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:42,358 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-17 02:35:42,358 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896278717] [2020-09-17 02:35:42,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-17 02:35:42,359 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:42,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-17 02:35:42,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-09-17 02:35:42,360 INFO L87 Difference]: Start difference. First operand 68 states and 169 transitions. Second operand 19 states. [2020-09-17 02:35:43,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:43,043 INFO L93 Difference]: Finished difference Result 117 states and 269 transitions. [2020-09-17 02:35:43,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-17 02:35:43,044 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-17 02:35:43,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:43,045 INFO L225 Difference]: With dead ends: 117 [2020-09-17 02:35:43,045 INFO L226 Difference]: Without dead ends: 111 [2020-09-17 02:35:43,046 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=468, Invalid=1254, Unknown=0, NotChecked=0, Total=1722 [2020-09-17 02:35:43,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-09-17 02:35:43,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 71. [2020-09-17 02:35:43,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-17 02:35:43,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 177 transitions. [2020-09-17 02:35:43,050 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 177 transitions. Word has length 23 [2020-09-17 02:35:43,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:43,050 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 177 transitions. [2020-09-17 02:35:43,050 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-17 02:35:43,050 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 177 transitions. [2020-09-17 02:35:43,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-17 02:35:43,051 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:43,051 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:43,258 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:43,258 INFO L427 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:43,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:43,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1095611739, now seen corresponding path program 132 times [2020-09-17 02:35:43,259 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:43,259 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826528210] [2020-09-17 02:35:43,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:43,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:43,541 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:43,541 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826528210] [2020-09-17 02:35:43,542 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730620654] [2020-09-17 02:35:43,542 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 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:43,608 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-09-17 02:35:43,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:43,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-17 02:35:43,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:43,651 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:35:43,665 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:43,666 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:43,666 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-17 02:35:43,666 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822614370] [2020-09-17 02:35:43,666 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-17 02:35:43,666 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:43,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-17 02:35:43,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:35:43,667 INFO L87 Difference]: Start difference. First operand 71 states and 177 transitions. Second operand 20 states. [2020-09-17 02:35:44,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:44,486 INFO L93 Difference]: Finished difference Result 114 states and 263 transitions. [2020-09-17 02:35:44,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-17 02:35:44,487 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-17 02:35:44,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:44,488 INFO L225 Difference]: With dead ends: 114 [2020-09-17 02:35:44,488 INFO L226 Difference]: Without dead ends: 108 [2020-09-17 02:35:44,488 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=475, Invalid=1331, Unknown=0, NotChecked=0, Total=1806 [2020-09-17 02:35:44,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-09-17 02:35:44,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 70. [2020-09-17 02:35:44,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-17 02:35:44,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 175 transitions. [2020-09-17 02:35:44,491 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 175 transitions. Word has length 23 [2020-09-17 02:35:44,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:44,491 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 175 transitions. [2020-09-17 02:35:44,491 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-17 02:35:44,491 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 175 transitions. [2020-09-17 02:35:44,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-17 02:35:44,492 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:44,492 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:44,700 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2020-09-17 02:35:44,701 INFO L427 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:44,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:44,701 INFO L82 PathProgramCache]: Analyzing trace with hash -1583163047, now seen corresponding path program 133 times [2020-09-17 02:35:44,701 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:44,702 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753248153] [2020-09-17 02:35:44,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:44,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:44,973 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:44,973 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753248153] [2020-09-17 02:35:44,974 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592793789] [2020-09-17 02:35:44,974 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 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:45,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:45,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-17 02:35:45,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:45,054 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:45,054 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:45,054 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-17 02:35:45,054 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522224159] [2020-09-17 02:35:45,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-17 02:35:45,055 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:45,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-17 02:35:45,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2020-09-17 02:35:45,055 INFO L87 Difference]: Start difference. First operand 70 states and 175 transitions. Second operand 19 states. [2020-09-17 02:35:45,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:45,853 INFO L93 Difference]: Finished difference Result 115 states and 267 transitions. [2020-09-17 02:35:45,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-17 02:35:45,854 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-17 02:35:45,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:45,855 INFO L225 Difference]: With dead ends: 115 [2020-09-17 02:35:45,855 INFO L226 Difference]: Without dead ends: 109 [2020-09-17 02:35:45,855 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=524, Invalid=1368, Unknown=0, NotChecked=0, Total=1892 [2020-09-17 02:35:45,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-09-17 02:35:45,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 73. [2020-09-17 02:35:45,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-09-17 02:35:45,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 183 transitions. [2020-09-17 02:35:45,857 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 183 transitions. Word has length 23 [2020-09-17 02:35:45,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:45,857 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 183 transitions. [2020-09-17 02:35:45,857 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-17 02:35:45,857 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 183 transitions. [2020-09-17 02:35:45,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-17 02:35:45,858 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:45,858 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:46,058 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:46,059 INFO L427 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:46,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:46,059 INFO L82 PathProgramCache]: Analyzing trace with hash -1063419971, now seen corresponding path program 134 times [2020-09-17 02:35:46,060 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:46,060 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470074530] [2020-09-17 02:35:46,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:46,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:46,330 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:46,330 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470074530] [2020-09-17 02:35:46,330 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416365787] [2020-09-17 02:35:46,330 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 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:46,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:35:46,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:46,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-17 02:35:46,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:46,417 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:35:46,436 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:46,436 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:46,436 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-17 02:35:46,437 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160244952] [2020-09-17 02:35:46,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-17 02:35:46,437 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:46,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-17 02:35:46,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:35:46,437 INFO L87 Difference]: Start difference. First operand 73 states and 183 transitions. Second operand 20 states. [2020-09-17 02:35:47,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:47,424 INFO L93 Difference]: Finished difference Result 112 states and 261 transitions. [2020-09-17 02:35:47,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-17 02:35:47,425 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-17 02:35:47,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:47,426 INFO L225 Difference]: With dead ends: 112 [2020-09-17 02:35:47,426 INFO L226 Difference]: Without dead ends: 106 [2020-09-17 02:35:47,426 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=532, Invalid=1448, Unknown=0, NotChecked=0, Total=1980 [2020-09-17 02:35:47,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-09-17 02:35:47,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 72. [2020-09-17 02:35:47,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-17 02:35:47,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 181 transitions. [2020-09-17 02:35:47,429 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 181 transitions. Word has length 23 [2020-09-17 02:35:47,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:47,429 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 181 transitions. [2020-09-17 02:35:47,429 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-17 02:35:47,430 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 181 transitions. [2020-09-17 02:35:47,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-17 02:35:47,430 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:47,430 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:47,639 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2020-09-17 02:35:47,639 INFO L427 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:47,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:47,640 INFO L82 PathProgramCache]: Analyzing trace with hash 591891259, now seen corresponding path program 135 times [2020-09-17 02:35:47,640 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:47,641 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669497711] [2020-09-17 02:35:47,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:47,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:47,900 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:47,900 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669497711] [2020-09-17 02:35:47,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182006774] [2020-09-17 02:35:47,901 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:47,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-09-17 02:35:47,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:47,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-17 02:35:47,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:47,988 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:47,988 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:47,988 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-17 02:35:47,988 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557128216] [2020-09-17 02:35:47,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-17 02:35:47,989 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:47,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-17 02:35:47,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-09-17 02:35:47,989 INFO L87 Difference]: Start difference. First operand 72 states and 181 transitions. Second operand 19 states. [2020-09-17 02:35:48,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:48,840 INFO L93 Difference]: Finished difference Result 113 states and 265 transitions. [2020-09-17 02:35:48,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-17 02:35:48,841 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-17 02:35:48,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:48,842 INFO L225 Difference]: With dead ends: 113 [2020-09-17 02:35:48,842 INFO L226 Difference]: Without dead ends: 107 [2020-09-17 02:35:48,842 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=596, Invalid=1474, Unknown=0, NotChecked=0, Total=2070 [2020-09-17 02:35:48,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-09-17 02:35:48,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 75. [2020-09-17 02:35:48,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-17 02:35:48,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-09-17 02:35:48,844 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 23 [2020-09-17 02:35:48,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:48,844 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-09-17 02:35:48,844 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-17 02:35:48,845 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-09-17 02:35:48,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-17 02:35:48,845 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:48,845 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:49,045 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2020-09-17 02:35:49,046 INFO L427 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:49,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:49,046 INFO L82 PathProgramCache]: Analyzing trace with hash -1128236385, now seen corresponding path program 136 times [2020-09-17 02:35:49,046 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:49,047 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713117354] [2020-09-17 02:35:49,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:49,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:49,308 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:49,308 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713117354] [2020-09-17 02:35:49,309 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204056643] [2020-09-17 02:35:49,309 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:49,369 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:35:49,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:49,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-17 02:35:49,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:49,398 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:35:49,413 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:49,414 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:49,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-17 02:35:49,414 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141562410] [2020-09-17 02:35:49,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-17 02:35:49,414 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:49,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-17 02:35:49,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:35:49,415 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 20 states. [2020-09-17 02:35:50,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:50,469 INFO L93 Difference]: Finished difference Result 110 states and 259 transitions. [2020-09-17 02:35:50,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-17 02:35:50,470 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-17 02:35:50,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:50,471 INFO L225 Difference]: With dead ends: 110 [2020-09-17 02:35:50,471 INFO L226 Difference]: Without dead ends: 104 [2020-09-17 02:35:50,472 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=605, Invalid=1557, Unknown=0, NotChecked=0, Total=2162 [2020-09-17 02:35:50,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-09-17 02:35:50,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 74. [2020-09-17 02:35:50,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-17 02:35:50,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-09-17 02:35:50,474 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 23 [2020-09-17 02:35:50,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:50,474 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-09-17 02:35:50,474 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-17 02:35:50,474 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-09-17 02:35:50,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-17 02:35:50,474 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:50,475 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:50,675 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2020-09-17 02:35:50,675 INFO L427 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:50,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:50,676 INFO L82 PathProgramCache]: Analyzing trace with hash -657240675, now seen corresponding path program 137 times [2020-09-17 02:35:50,676 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:50,676 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826914401] [2020-09-17 02:35:50,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:50,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:50,922 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:50,923 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826914401] [2020-09-17 02:35:50,923 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599658267] [2020-09-17 02:35:50,923 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:50,987 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-09-17 02:35:50,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:50,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-17 02:35:50,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:51,015 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:51,015 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:51,015 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-17 02:35:51,016 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768835422] [2020-09-17 02:35:51,016 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-17 02:35:51,016 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:51,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-17 02:35:51,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-09-17 02:35:51,017 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 19 states. [2020-09-17 02:35:51,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:51,950 INFO L93 Difference]: Finished difference Result 111 states and 263 transitions. [2020-09-17 02:35:51,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-17 02:35:51,951 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-17 02:35:51,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:51,952 INFO L225 Difference]: With dead ends: 111 [2020-09-17 02:35:51,952 INFO L226 Difference]: Without dead ends: 105 [2020-09-17 02:35:51,953 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=684, Invalid=1572, Unknown=0, NotChecked=0, Total=2256 [2020-09-17 02:35:51,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-09-17 02:35:51,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 77. [2020-09-17 02:35:51,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-09-17 02:35:51,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 195 transitions. [2020-09-17 02:35:51,955 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 195 transitions. Word has length 23 [2020-09-17 02:35:51,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:51,955 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 195 transitions. [2020-09-17 02:35:51,955 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-17 02:35:51,955 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 195 transitions. [2020-09-17 02:35:51,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-17 02:35:51,955 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:51,955 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:52,156 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:52,156 INFO L427 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:52,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:52,157 INFO L82 PathProgramCache]: Analyzing trace with hash -641153535, now seen corresponding path program 138 times [2020-09-17 02:35:52,157 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:52,157 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120416128] [2020-09-17 02:35:52,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:52,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:52,418 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:52,418 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120416128] [2020-09-17 02:35:52,418 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675970379] [2020-09-17 02:35:52,418 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:52,485 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-09-17 02:35:52,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:52,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-17 02:35:52,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:52,515 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:35:52,534 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:52,534 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:52,534 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-17 02:35:52,535 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816899] [2020-09-17 02:35:52,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-17 02:35:52,535 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:52,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-17 02:35:52,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:35:52,535 INFO L87 Difference]: Start difference. First operand 77 states and 195 transitions. Second operand 20 states. [2020-09-17 02:35:53,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:53,695 INFO L93 Difference]: Finished difference Result 108 states and 257 transitions. [2020-09-17 02:35:53,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-17 02:35:53,696 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-17 02:35:53,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:53,697 INFO L225 Difference]: With dead ends: 108 [2020-09-17 02:35:53,697 INFO L226 Difference]: Without dead ends: 102 [2020-09-17 02:35:53,697 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=694, Invalid=1658, Unknown=0, NotChecked=0, Total=2352 [2020-09-17 02:35:53,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-09-17 02:35:53,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 76. [2020-09-17 02:35:53,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-17 02:35:53,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 193 transitions. [2020-09-17 02:35:53,700 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 193 transitions. Word has length 23 [2020-09-17 02:35:53,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:53,700 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 193 transitions. [2020-09-17 02:35:53,700 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-17 02:35:53,700 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 193 transitions. [2020-09-17 02:35:53,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-17 02:35:53,700 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:53,700 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:53,901 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2020-09-17 02:35:53,901 INFO L427 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:53,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:53,902 INFO L82 PathProgramCache]: Analyzing trace with hash -640663425, now seen corresponding path program 139 times [2020-09-17 02:35:53,902 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:53,902 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162438503] [2020-09-17 02:35:53,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:53,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:54,155 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:54,156 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162438503] [2020-09-17 02:35:54,156 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781216914] [2020-09-17 02:35:54,156 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:54,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:54,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-17 02:35:54,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:54,239 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:54,240 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:54,240 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-17 02:35:54,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696183531] [2020-09-17 02:35:54,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-17 02:35:54,241 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:54,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-17 02:35:54,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2020-09-17 02:35:54,241 INFO L87 Difference]: Start difference. First operand 76 states and 193 transitions. Second operand 19 states. [2020-09-17 02:35:55,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:55,240 INFO L93 Difference]: Finished difference Result 128 states and 307 transitions. [2020-09-17 02:35:55,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-17 02:35:55,241 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-17 02:35:55,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:55,242 INFO L225 Difference]: With dead ends: 128 [2020-09-17 02:35:55,242 INFO L226 Difference]: Without dead ends: 122 [2020-09-17 02:35:55,242 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=788, Invalid=1662, Unknown=0, NotChecked=0, Total=2450 [2020-09-17 02:35:55,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-09-17 02:35:55,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 82. [2020-09-17 02:35:55,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-17 02:35:55,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 213 transitions. [2020-09-17 02:35:55,244 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 213 transitions. Word has length 23 [2020-09-17 02:35:55,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:55,245 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 213 transitions. [2020-09-17 02:35:55,245 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-17 02:35:55,245 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 213 transitions. [2020-09-17 02:35:55,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-17 02:35:55,245 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:55,245 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:55,452 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:55,452 INFO L427 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:55,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:55,453 INFO L82 PathProgramCache]: Analyzing trace with hash -640646685, now seen corresponding path program 140 times [2020-09-17 02:35:55,453 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:55,453 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768317309] [2020-09-17 02:35:55,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:55,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:55,708 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:55,708 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768317309] [2020-09-17 02:35:55,708 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312263303] [2020-09-17 02:35:55,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:55,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:35:55,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:55,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-17 02:35:55,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:55,797 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:35:55,816 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:55,816 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:55,816 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-17 02:35:55,817 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365281252] [2020-09-17 02:35:55,817 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-17 02:35:55,817 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:55,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-17 02:35:55,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:35:55,818 INFO L87 Difference]: Start difference. First operand 82 states and 213 transitions. Second operand 20 states. [2020-09-17 02:35:57,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:57,022 INFO L93 Difference]: Finished difference Result 109 states and 263 transitions. [2020-09-17 02:35:57,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-17 02:35:57,023 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-17 02:35:57,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:57,024 INFO L225 Difference]: With dead ends: 109 [2020-09-17 02:35:57,024 INFO L226 Difference]: Without dead ends: 101 [2020-09-17 02:35:57,025 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=799, Invalid=1751, Unknown=0, NotChecked=0, Total=2550 [2020-09-17 02:35:57,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-17 02:35:57,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 79. [2020-09-17 02:35:57,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-17 02:35:57,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 201 transitions. [2020-09-17 02:35:57,027 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 201 transitions. Word has length 23 [2020-09-17 02:35:57,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:57,027 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 201 transitions. [2020-09-17 02:35:57,027 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-17 02:35:57,027 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 201 transitions. [2020-09-17 02:35:57,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-17 02:35:57,028 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:57,028 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:57,228 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:57,229 INFO L427 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:57,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:57,229 INFO L82 PathProgramCache]: Analyzing trace with hash -768088516, now seen corresponding path program 141 times [2020-09-17 02:35:57,229 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:57,230 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241845603] [2020-09-17 02:35:57,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:57,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:57,592 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:57,593 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241845603] [2020-09-17 02:35:57,593 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719138095] [2020-09-17 02:35:57,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:57,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-09-17 02:35:57,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:57,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-17 02:35:57,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:57,675 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:57,675 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:57,676 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-17 02:35:57,676 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366934280] [2020-09-17 02:35:57,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-17 02:35:57,676 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:57,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-17 02:35:57,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:35:57,677 INFO L87 Difference]: Start difference. First operand 79 states and 201 transitions. Second operand 20 states. [2020-09-17 02:35:58,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:58,257 INFO L93 Difference]: Finished difference Result 124 states and 291 transitions. [2020-09-17 02:35:58,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-17 02:35:58,257 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-17 02:35:58,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:58,258 INFO L225 Difference]: With dead ends: 124 [2020-09-17 02:35:58,258 INFO L226 Difference]: Without dead ends: 118 [2020-09-17 02:35:58,259 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=405, Invalid=927, Unknown=0, NotChecked=0, Total=1332 [2020-09-17 02:35:58,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-09-17 02:35:58,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 81. [2020-09-17 02:35:58,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-17 02:35:58,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-17 02:35:58,261 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-09-17 02:35:58,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:58,262 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-17 02:35:58,262 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-17 02:35:58,262 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-17 02:35:58,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-17 02:35:58,262 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:58,262 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:58,471 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:58,471 INFO L427 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:58,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:58,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1578637152, now seen corresponding path program 142 times [2020-09-17 02:35:58,472 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:58,472 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042709919] [2020-09-17 02:35:58,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:58,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:58,834 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:58,835 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042709919] [2020-09-17 02:35:58,835 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991516713] [2020-09-17 02:35:58,835 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 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:58,897 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:35:58,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:58,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-17 02:35:58,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:58,926 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:35:58,939 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:58,940 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:58,940 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-17 02:35:58,940 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265610015] [2020-09-17 02:35:58,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-17 02:35:58,940 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:58,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-17 02:35:58,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-09-17 02:35:58,941 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-09-17 02:35:59,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:59,634 INFO L93 Difference]: Finished difference Result 121 states and 285 transitions. [2020-09-17 02:35:59,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-17 02:35:59,635 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-17 02:35:59,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:59,636 INFO L225 Difference]: With dead ends: 121 [2020-09-17 02:35:59,636 INFO L226 Difference]: Without dead ends: 115 [2020-09-17 02:35:59,636 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=449, Invalid=1111, Unknown=0, NotChecked=0, Total=1560 [2020-09-17 02:35:59,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-09-17 02:35:59,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 80. [2020-09-17 02:35:59,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-17 02:35:59,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-17 02:35:59,638 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-09-17 02:35:59,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:59,639 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-17 02:35:59,639 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-17 02:35:59,639 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-17 02:35:59,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-17 02:35:59,639 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:59,639 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:59,839 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:59,840 INFO L427 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:59,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:59,840 INFO L82 PathProgramCache]: Analyzing trace with hash -1526360546, now seen corresponding path program 143 times [2020-09-17 02:35:59,841 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:59,841 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012437972] [2020-09-17 02:35:59,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:59,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:00,170 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:00,170 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012437972] [2020-09-17 02:36:00,171 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398477429] [2020-09-17 02:36:00,171 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 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:00,243 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-09-17 02:36:00,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:00,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-17 02:36:00,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:00,259 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:00,260 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:00,260 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-17 02:36:00,260 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093830520] [2020-09-17 02:36:00,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-17 02:36:00,260 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:00,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-17 02:36:00,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:36:00,261 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-09-17 02:36:00,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:00,917 INFO L93 Difference]: Finished difference Result 118 states and 279 transitions. [2020-09-17 02:36:00,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-17 02:36:00,918 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-17 02:36:00,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:00,918 INFO L225 Difference]: With dead ends: 118 [2020-09-17 02:36:00,918 INFO L226 Difference]: Without dead ends: 112 [2020-09-17 02:36:00,919 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=414, Invalid=1068, Unknown=0, NotChecked=0, Total=1482 [2020-09-17 02:36:00,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-09-17 02:36:00,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 81. [2020-09-17 02:36:00,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-17 02:36:00,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-17 02:36:00,921 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-09-17 02:36:00,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:00,922 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-17 02:36:00,922 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-17 02:36:00,922 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-17 02:36:00,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-17 02:36:00,922 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:00,922 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:01,123 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:01,123 INFO L427 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:01,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:01,124 INFO L82 PathProgramCache]: Analyzing trace with hash 349888898, now seen corresponding path program 144 times [2020-09-17 02:36:01,124 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:01,124 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971747018] [2020-09-17 02:36:01,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:01,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:01,457 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:01,458 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971747018] [2020-09-17 02:36:01,458 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994665559] [2020-09-17 02:36:01,458 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 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:01,522 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-09-17 02:36:01,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:01,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-17 02:36:01,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:01,551 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:36:01,567 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:01,567 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:01,567 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-17 02:36:01,567 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530727271] [2020-09-17 02:36:01,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-17 02:36:01,568 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:01,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-17 02:36:01,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2020-09-17 02:36:01,573 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-09-17 02:36:02,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:02,333 INFO L93 Difference]: Finished difference Result 117 states and 277 transitions. [2020-09-17 02:36:02,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-17 02:36:02,334 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-17 02:36:02,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:02,335 INFO L225 Difference]: With dead ends: 117 [2020-09-17 02:36:02,335 INFO L226 Difference]: Without dead ends: 111 [2020-09-17 02:36:02,335 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=465, Invalid=1257, Unknown=0, NotChecked=0, Total=1722 [2020-09-17 02:36:02,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-09-17 02:36:02,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 80. [2020-09-17 02:36:02,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-17 02:36:02,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-17 02:36:02,338 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-09-17 02:36:02,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:02,338 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-17 02:36:02,338 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-17 02:36:02,338 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-17 02:36:02,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-17 02:36:02,338 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:02,339 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:02,539 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2020-09-17 02:36:02,539 INFO L427 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:02,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:02,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1038210688, now seen corresponding path program 145 times [2020-09-17 02:36:02,540 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:02,540 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039581475] [2020-09-17 02:36:02,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:02,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:02,858 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:02,859 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039581475] [2020-09-17 02:36:02,859 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332864110] [2020-09-17 02:36:02,859 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 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:02,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:02,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-17 02:36:02,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:02,936 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:02,937 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:02,937 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-17 02:36:02,937 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639473239] [2020-09-17 02:36:02,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-17 02:36:02,937 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:02,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-17 02:36:02,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:36:02,938 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-09-17 02:36:03,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:03,667 INFO L93 Difference]: Finished difference Result 114 states and 271 transitions. [2020-09-17 02:36:03,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-17 02:36:03,668 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-17 02:36:03,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:03,668 INFO L225 Difference]: With dead ends: 114 [2020-09-17 02:36:03,669 INFO L226 Difference]: Without dead ends: 108 [2020-09-17 02:36:03,669 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=439, Invalid=1201, Unknown=0, NotChecked=0, Total=1640 [2020-09-17 02:36:03,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-09-17 02:36:03,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 81. [2020-09-17 02:36:03,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-17 02:36:03,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-17 02:36:03,670 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-09-17 02:36:03,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:03,671 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-17 02:36:03,671 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-17 02:36:03,671 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-17 02:36:03,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-17 02:36:03,671 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:03,671 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:03,874 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2020-09-17 02:36:03,874 INFO L427 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:03,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:03,875 INFO L82 PathProgramCache]: Analyzing trace with hash 2023402212, now seen corresponding path program 146 times [2020-09-17 02:36:03,875 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:03,875 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800189037] [2020-09-17 02:36:03,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:03,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:04,188 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:04,189 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800189037] [2020-09-17 02:36:04,189 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106869642] [2020-09-17 02:36:04,189 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 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:04,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:36:04,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:04,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-17 02:36:04,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:04,282 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:36:04,303 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:04,303 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:04,303 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-17 02:36:04,304 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068900157] [2020-09-17 02:36:04,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-17 02:36:04,304 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:04,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-17 02:36:04,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2020-09-17 02:36:04,304 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-09-17 02:36:05,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:05,225 INFO L93 Difference]: Finished difference Result 113 states and 269 transitions. [2020-09-17 02:36:05,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-17 02:36:05,226 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-17 02:36:05,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:05,227 INFO L225 Difference]: With dead ends: 113 [2020-09-17 02:36:05,227 INFO L226 Difference]: Without dead ends: 107 [2020-09-17 02:36:05,228 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=497, Invalid=1395, Unknown=0, NotChecked=0, Total=1892 [2020-09-17 02:36:05,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-09-17 02:36:05,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 80. [2020-09-17 02:36:05,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-17 02:36:05,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-17 02:36:05,230 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-09-17 02:36:05,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:05,230 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-17 02:36:05,230 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-17 02:36:05,231 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-17 02:36:05,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-17 02:36:05,231 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:05,231 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:05,440 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2020-09-17 02:36:05,440 INFO L427 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:05,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:05,441 INFO L82 PathProgramCache]: Analyzing trace with hash 406243170, now seen corresponding path program 147 times [2020-09-17 02:36:05,441 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:05,441 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786536275] [2020-09-17 02:36:05,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:05,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:05,750 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:05,750 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786536275] [2020-09-17 02:36:05,750 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336779779] [2020-09-17 02:36:05,751 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 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:05,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-09-17 02:36:05,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:05,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-17 02:36:05,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:05,840 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:05,840 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:05,840 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-17 02:36:05,840 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204685201] [2020-09-17 02:36:05,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-17 02:36:05,841 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:05,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-17 02:36:05,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:36:05,841 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-09-17 02:36:06,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:06,643 INFO L93 Difference]: Finished difference Result 110 states and 263 transitions. [2020-09-17 02:36:06,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-17 02:36:06,644 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-17 02:36:06,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:06,644 INFO L225 Difference]: With dead ends: 110 [2020-09-17 02:36:06,645 INFO L226 Difference]: Without dead ends: 104 [2020-09-17 02:36:06,645 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=480, Invalid=1326, Unknown=0, NotChecked=0, Total=1806 [2020-09-17 02:36:06,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-09-17 02:36:06,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 81. [2020-09-17 02:36:06,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-17 02:36:06,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-17 02:36:06,648 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-09-17 02:36:06,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:06,648 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-17 02:36:06,648 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-17 02:36:06,648 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-17 02:36:06,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-17 02:36:06,649 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:06,649 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:06,857 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2020-09-17 02:36:06,857 INFO L427 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:06,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:06,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1663132870, now seen corresponding path program 148 times [2020-09-17 02:36:06,858 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:06,858 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239694099] [2020-09-17 02:36:06,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:06,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:07,172 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:07,173 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239694099] [2020-09-17 02:36:07,173 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546397045] [2020-09-17 02:36:07,173 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:07,234 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:36:07,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:07,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-17 02:36:07,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:07,264 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:36:07,281 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:07,282 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:07,282 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-17 02:36:07,282 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243020293] [2020-09-17 02:36:07,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-17 02:36:07,283 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:07,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-17 02:36:07,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2020-09-17 02:36:07,283 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-09-17 02:36:08,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:08,294 INFO L93 Difference]: Finished difference Result 109 states and 261 transitions. [2020-09-17 02:36:08,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-17 02:36:08,295 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-17 02:36:08,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:08,295 INFO L225 Difference]: With dead ends: 109 [2020-09-17 02:36:08,296 INFO L226 Difference]: Without dead ends: 103 [2020-09-17 02:36:08,296 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=545, Invalid=1525, Unknown=0, NotChecked=0, Total=2070 [2020-09-17 02:36:08,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-17 02:36:08,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 80. [2020-09-17 02:36:08,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-17 02:36:08,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-17 02:36:08,298 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-09-17 02:36:08,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:08,299 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-17 02:36:08,299 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-17 02:36:08,299 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-17 02:36:08,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-17 02:36:08,299 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:08,299 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:08,500 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:08,500 INFO L427 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:08,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:08,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1015641916, now seen corresponding path program 149 times [2020-09-17 02:36:08,501 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:08,501 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447268947] [2020-09-17 02:36:08,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:08,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:08,792 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:08,792 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447268947] [2020-09-17 02:36:08,792 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218040061] [2020-09-17 02:36:08,792 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:08,857 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-09-17 02:36:08,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:08,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-17 02:36:08,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:08,885 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:08,885 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:08,886 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-17 02:36:08,886 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243679786] [2020-09-17 02:36:08,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-17 02:36:08,886 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:08,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-17 02:36:08,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:36:08,886 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-09-17 02:36:09,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:09,760 INFO L93 Difference]: Finished difference Result 106 states and 255 transitions. [2020-09-17 02:36:09,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-17 02:36:09,761 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-17 02:36:09,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:09,762 INFO L225 Difference]: With dead ends: 106 [2020-09-17 02:36:09,762 INFO L226 Difference]: Without dead ends: 100 [2020-09-17 02:36:09,763 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=537, Invalid=1443, Unknown=0, NotChecked=0, Total=1980 [2020-09-17 02:36:09,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-17 02:36:09,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 81. [2020-09-17 02:36:09,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-17 02:36:09,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-17 02:36:09,765 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-09-17 02:36:09,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:09,765 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-17 02:36:09,765 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-17 02:36:09,765 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-17 02:36:09,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-17 02:36:09,765 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:09,766 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:09,966 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2020-09-17 02:36:09,966 INFO L427 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:09,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:09,967 INFO L82 PathProgramCache]: Analyzing trace with hash -495898840, now seen corresponding path program 150 times [2020-09-17 02:36:09,967 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:09,967 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826670589] [2020-09-17 02:36:09,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:09,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:10,264 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:10,265 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826670589] [2020-09-17 02:36:10,265 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868385393] [2020-09-17 02:36:10,265 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 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:10,331 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-09-17 02:36:10,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:10,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-17 02:36:10,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:10,365 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:36:10,382 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:10,383 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:10,383 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-17 02:36:10,383 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644401816] [2020-09-17 02:36:10,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-17 02:36:10,383 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:10,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-17 02:36:10,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2020-09-17 02:36:10,384 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-09-17 02:36:11,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:11,497 INFO L93 Difference]: Finished difference Result 105 states and 253 transitions. [2020-09-17 02:36:11,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-17 02:36:11,497 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-17 02:36:11,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:11,498 INFO L225 Difference]: With dead ends: 105 [2020-09-17 02:36:11,498 INFO L226 Difference]: Without dead ends: 99 [2020-09-17 02:36:11,499 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=609, Invalid=1647, Unknown=0, NotChecked=0, Total=2256 [2020-09-17 02:36:11,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-09-17 02:36:11,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 80. [2020-09-17 02:36:11,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-17 02:36:11,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-17 02:36:11,501 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-09-17 02:36:11,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:11,501 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-17 02:36:11,501 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-17 02:36:11,501 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-17 02:36:11,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-17 02:36:11,502 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:11,502 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:11,702 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:11,703 INFO L427 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:11,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:11,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1159412390, now seen corresponding path program 151 times [2020-09-17 02:36:11,703 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:11,704 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017397156] [2020-09-17 02:36:11,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:11,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:11,972 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:11,972 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017397156] [2020-09-17 02:36:11,972 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53666163] [2020-09-17 02:36:11,973 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 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:12,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:12,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-17 02:36:12,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:12,057 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:12,057 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:12,057 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-17 02:36:12,058 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425188277] [2020-09-17 02:36:12,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-17 02:36:12,058 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:12,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-17 02:36:12,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:36:12,059 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-09-17 02:36:12,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:13,000 INFO L93 Difference]: Finished difference Result 102 states and 247 transitions. [2020-09-17 02:36:13,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-17 02:36:13,001 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-17 02:36:13,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:13,001 INFO L225 Difference]: With dead ends: 102 [2020-09-17 02:36:13,001 INFO L226 Difference]: Without dead ends: 96 [2020-09-17 02:36:13,002 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=610, Invalid=1552, Unknown=0, NotChecked=0, Total=2162 [2020-09-17 02:36:13,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-09-17 02:36:13,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 81. [2020-09-17 02:36:13,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-17 02:36:13,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-17 02:36:13,004 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-09-17 02:36:13,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:13,004 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-17 02:36:13,004 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-17 02:36:13,005 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-17 02:36:13,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-17 02:36:13,005 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:13,005 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:13,205 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:13,206 INFO L427 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:13,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:13,206 INFO L82 PathProgramCache]: Analyzing trace with hash -560715254, now seen corresponding path program 152 times [2020-09-17 02:36:13,207 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:13,207 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255621389] [2020-09-17 02:36:13,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:13,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:13,494 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:13,494 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255621389] [2020-09-17 02:36:13,494 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296362130] [2020-09-17 02:36:13,494 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 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:13,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:36:13,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:13,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-17 02:36:13,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:13,584 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:36:13,602 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:13,602 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:13,602 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-17 02:36:13,603 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260862307] [2020-09-17 02:36:13,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-17 02:36:13,603 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:13,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-17 02:36:13,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-09-17 02:36:13,604 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-09-17 02:36:14,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:14,836 INFO L93 Difference]: Finished difference Result 101 states and 245 transitions. [2020-09-17 02:36:14,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-17 02:36:14,837 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-17 02:36:14,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:14,838 INFO L225 Difference]: With dead ends: 101 [2020-09-17 02:36:14,838 INFO L226 Difference]: Without dead ends: 95 [2020-09-17 02:36:14,838 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=689, Invalid=1761, Unknown=0, NotChecked=0, Total=2450 [2020-09-17 02:36:14,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-09-17 02:36:14,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 80. [2020-09-17 02:36:14,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-17 02:36:14,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-17 02:36:14,840 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-09-17 02:36:14,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:14,841 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-17 02:36:14,841 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-17 02:36:14,841 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-17 02:36:14,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-17 02:36:14,841 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:14,841 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:15,044 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable153 [2020-09-17 02:36:15,044 INFO L427 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:15,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:15,045 INFO L82 PathProgramCache]: Analyzing trace with hash -89719544, now seen corresponding path program 153 times [2020-09-17 02:36:15,045 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:15,045 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889153342] [2020-09-17 02:36:15,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:15,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:15,326 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:15,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889153342] [2020-09-17 02:36:15,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942853418] [2020-09-17 02:36:15,327 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:15,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-09-17 02:36:15,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:15,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-17 02:36:15,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:15,418 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:15,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:15,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-17 02:36:15,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753604989] [2020-09-17 02:36:15,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-17 02:36:15,419 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:15,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-17 02:36:15,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:36:15,419 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-09-17 02:36:16,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:16,447 INFO L93 Difference]: Finished difference Result 98 states and 239 transitions. [2020-09-17 02:36:16,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-17 02:36:16,448 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-17 02:36:16,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:16,449 INFO L225 Difference]: With dead ends: 98 [2020-09-17 02:36:16,449 INFO L226 Difference]: Without dead ends: 92 [2020-09-17 02:36:16,449 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=699, Invalid=1653, Unknown=0, NotChecked=0, Total=2352 [2020-09-17 02:36:16,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-09-17 02:36:16,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 81. [2020-09-17 02:36:16,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-17 02:36:16,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-17 02:36:16,452 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-09-17 02:36:16,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:16,452 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-17 02:36:16,452 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-17 02:36:16,452 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-17 02:36:16,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-17 02:36:16,452 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:16,452 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:16,653 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:16,653 INFO L427 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:16,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:16,654 INFO L82 PathProgramCache]: Analyzing trace with hash -73632404, now seen corresponding path program 154 times [2020-09-17 02:36:16,654 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:16,654 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764242174] [2020-09-17 02:36:16,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:16,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:16,941 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:16,942 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764242174] [2020-09-17 02:36:16,942 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946395050] [2020-09-17 02:36:16,942 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 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:17,001 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:36:17,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:17,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-17 02:36:17,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:17,036 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:36:17,057 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:17,057 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:17,058 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-17 02:36:17,058 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695894844] [2020-09-17 02:36:17,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-17 02:36:17,058 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:17,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-17 02:36:17,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2020-09-17 02:36:17,059 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-09-17 02:36:18,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:18,414 INFO L93 Difference]: Finished difference Result 97 states and 237 transitions. [2020-09-17 02:36:18,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-17 02:36:18,415 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-17 02:36:18,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:18,416 INFO L225 Difference]: With dead ends: 97 [2020-09-17 02:36:18,416 INFO L226 Difference]: Without dead ends: 91 [2020-09-17 02:36:18,416 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=785, Invalid=1867, Unknown=0, NotChecked=0, Total=2652 [2020-09-17 02:36:18,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-09-17 02:36:18,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 80. [2020-09-17 02:36:18,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-17 02:36:18,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-17 02:36:18,419 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-09-17 02:36:18,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:18,419 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-17 02:36:18,419 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-17 02:36:18,419 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-17 02:36:18,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-17 02:36:18,419 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:18,419 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:18,620 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2020-09-17 02:36:18,620 INFO L427 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:18,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:18,621 INFO L82 PathProgramCache]: Analyzing trace with hash -73142294, now seen corresponding path program 155 times [2020-09-17 02:36:18,621 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:18,621 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694660783] [2020-09-17 02:36:18,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:18,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:18,904 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:18,905 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694660783] [2020-09-17 02:36:18,905 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060976913] [2020-09-17 02:36:18,905 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 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:18,970 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-09-17 02:36:18,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:18,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-17 02:36:18,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:18,997 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:18,997 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:18,998 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-17 02:36:18,998 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528348548] [2020-09-17 02:36:18,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-17 02:36:18,998 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:18,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-17 02:36:18,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:36:18,999 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-09-17 02:36:20,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:20,111 INFO L93 Difference]: Finished difference Result 113 states and 277 transitions. [2020-09-17 02:36:20,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-17 02:36:20,112 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-17 02:36:20,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:20,112 INFO L225 Difference]: With dead ends: 113 [2020-09-17 02:36:20,112 INFO L226 Difference]: Without dead ends: 107 [2020-09-17 02:36:20,113 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=804, Invalid=1746, Unknown=0, NotChecked=0, Total=2550 [2020-09-17 02:36:20,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-09-17 02:36:20,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 84. [2020-09-17 02:36:20,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-09-17 02:36:20,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 217 transitions. [2020-09-17 02:36:20,115 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 217 transitions. Word has length 24 [2020-09-17 02:36:20,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:20,116 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 217 transitions. [2020-09-17 02:36:20,116 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-17 02:36:20,116 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 217 transitions. [2020-09-17 02:36:20,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-17 02:36:20,116 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:20,116 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:20,316 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2020-09-17 02:36:20,317 INFO L427 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:20,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:20,318 INFO L82 PathProgramCache]: Analyzing trace with hash -73125554, now seen corresponding path program 156 times [2020-09-17 02:36:20,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:20,318 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796770493] [2020-09-17 02:36:20,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:20,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:20,600 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:20,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796770493] [2020-09-17 02:36:20,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738111643] [2020-09-17 02:36:20,601 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 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:20,669 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-09-17 02:36:20,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:20,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-17 02:36:20,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:20,713 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:36:20,729 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:20,730 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:20,730 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-17 02:36:20,730 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874102274] [2020-09-17 02:36:20,730 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-17 02:36:20,731 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:20,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-17 02:36:20,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2020-09-17 02:36:20,731 INFO L87 Difference]: Start difference. First operand 84 states and 217 transitions. Second operand 21 states. [2020-09-17 02:36:22,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:22,114 INFO L93 Difference]: Finished difference Result 94 states and 233 transitions. [2020-09-17 02:36:22,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-17 02:36:22,115 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-17 02:36:22,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:22,115 INFO L225 Difference]: With dead ends: 94 [2020-09-17 02:36:22,116 INFO L226 Difference]: Without dead ends: 86 [2020-09-17 02:36:22,116 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=897, Invalid=1965, Unknown=0, NotChecked=0, Total=2862 [2020-09-17 02:36:22,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-09-17 02:36:22,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 61. [2020-09-17 02:36:22,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-09-17 02:36:22,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 148 transitions. [2020-09-17 02:36:22,118 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 148 transitions. Word has length 24 [2020-09-17 02:36:22,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:22,118 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 148 transitions. [2020-09-17 02:36:22,118 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-17 02:36:22,118 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 148 transitions. [2020-09-17 02:36:22,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-17 02:36:22,119 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:22,119 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:22,319 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2020-09-17 02:36:22,320 INFO L427 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:22,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:22,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1614805552, now seen corresponding path program 157 times [2020-09-17 02:36:22,321 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:22,321 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458330345] [2020-09-17 02:36:22,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:22,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:22,565 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:22,565 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458330345] [2020-09-17 02:36:22,566 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469839199] [2020-09-17 02:36:22,566 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 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:22,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:22,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-17 02:36:22,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:22,665 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:36:22,691 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:22,691 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:22,691 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-17 02:36:22,692 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189997524] [2020-09-17 02:36:22,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-17 02:36:22,692 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:22,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-17 02:36:22,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2020-09-17 02:36:22,693 INFO L87 Difference]: Start difference. First operand 61 states and 148 transitions. Second operand 21 states. [2020-09-17 02:36:23,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:23,992 INFO L93 Difference]: Finished difference Result 108 states and 263 transitions. [2020-09-17 02:36:23,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-17 02:36:23,993 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-17 02:36:23,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:23,994 INFO L225 Difference]: With dead ends: 108 [2020-09-17 02:36:23,994 INFO L226 Difference]: Without dead ends: 103 [2020-09-17 02:36:23,994 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=938, Invalid=1924, Unknown=0, NotChecked=0, Total=2862 [2020-09-17 02:36:23,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-17 02:36:23,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 82. [2020-09-17 02:36:23,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-17 02:36:23,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 209 transitions. [2020-09-17 02:36:23,996 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 209 transitions. Word has length 24 [2020-09-17 02:36:23,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:23,996 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 209 transitions. [2020-09-17 02:36:23,996 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-17 02:36:23,997 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 209 transitions. [2020-09-17 02:36:23,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-17 02:36:23,997 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:23,997 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:24,197 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2020-09-17 02:36:24,198 INFO L427 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:24,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:24,198 INFO L82 PathProgramCache]: Analyzing trace with hash 2028091429, now seen corresponding path program 158 times [2020-09-17 02:36:24,199 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:24,199 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325289731] [2020-09-17 02:36:24,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:24,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:24,502 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:24,503 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325289731] [2020-09-17 02:36:24,503 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520262177] [2020-09-17 02:36:24,503 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 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:24,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:36:24,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:24,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-17 02:36:24,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:24,604 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:36:24,629 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:24,629 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:24,629 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-17 02:36:24,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779326645] [2020-09-17 02:36:24,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-17 02:36:24,630 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:24,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-17 02:36:24,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2020-09-17 02:36:24,631 INFO L87 Difference]: Start difference. First operand 82 states and 209 transitions. Second operand 22 states. [2020-09-17 02:36:26,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:26,032 INFO L93 Difference]: Finished difference Result 90 states and 229 transitions. [2020-09-17 02:36:26,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-17 02:36:26,033 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-17 02:36:26,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:26,034 INFO L225 Difference]: With dead ends: 90 [2020-09-17 02:36:26,034 INFO L226 Difference]: Without dead ends: 85 [2020-09-17 02:36:26,034 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=955, Invalid=2015, Unknown=0, NotChecked=0, Total=2970 [2020-09-17 02:36:26,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-17 02:36:26,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62. [2020-09-17 02:36:26,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-17 02:36:26,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 152 transitions. [2020-09-17 02:36:26,037 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 152 transitions. Word has length 25 [2020-09-17 02:36:26,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:26,037 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 152 transitions. [2020-09-17 02:36:26,037 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-17 02:36:26,037 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 152 transitions. [2020-09-17 02:36:26,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-17 02:36:26,037 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:26,038 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:26,238 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:26,238 INFO L427 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:26,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:26,239 INFO L82 PathProgramCache]: Analyzing trace with hash 674366672, now seen corresponding path program 159 times [2020-09-17 02:36:26,239 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:26,239 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555462087] [2020-09-17 02:36:26,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:26,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:26,633 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:26,633 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555462087] [2020-09-17 02:36:26,634 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917806376] [2020-09-17 02:36:26,634 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 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:26,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-17 02:36:26,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:26,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-17 02:36:26,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:26,717 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:26,717 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:26,717 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-17 02:36:26,718 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907631029] [2020-09-17 02:36:26,718 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-17 02:36:26,718 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:26,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-17 02:36:26,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2020-09-17 02:36:26,719 INFO L87 Difference]: Start difference. First operand 62 states and 152 transitions. Second operand 21 states. [2020-09-17 02:36:27,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:27,327 INFO L93 Difference]: Finished difference Result 96 states and 223 transitions. [2020-09-17 02:36:27,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-17 02:36:27,328 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-17 02:36:27,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:27,329 INFO L225 Difference]: With dead ends: 96 [2020-09-17 02:36:27,329 INFO L226 Difference]: Without dead ends: 90 [2020-09-17 02:36:27,329 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=453, Invalid=953, Unknown=0, NotChecked=0, Total=1406 [2020-09-17 02:36:27,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-17 02:36:27,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 70. [2020-09-17 02:36:27,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-17 02:36:27,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 171 transitions. [2020-09-17 02:36:27,331 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 171 transitions. Word has length 25 [2020-09-17 02:36:27,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:27,332 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 171 transitions. [2020-09-17 02:36:27,332 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-17 02:36:27,332 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 171 transitions. [2020-09-17 02:36:27,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-17 02:36:27,332 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:27,333 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:27,533 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:27,534 INFO L427 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:27,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:27,534 INFO L82 PathProgramCache]: Analyzing trace with hash -873791948, now seen corresponding path program 160 times [2020-09-17 02:36:27,534 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:27,535 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023560082] [2020-09-17 02:36:27,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:27,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:27,937 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:27,937 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023560082] [2020-09-17 02:36:27,938 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580559943] [2020-09-17 02:36:27,938 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 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:28,007 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:36:28,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:28,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-17 02:36:28,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:28,035 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:36:28,049 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:28,049 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:28,049 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-17 02:36:28,049 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295472464] [2020-09-17 02:36:28,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-17 02:36:28,050 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:28,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-17 02:36:28,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2020-09-17 02:36:28,050 INFO L87 Difference]: Start difference. First operand 70 states and 171 transitions. Second operand 22 states. [2020-09-17 02:36:28,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:28,732 INFO L93 Difference]: Finished difference Result 114 states and 259 transitions. [2020-09-17 02:36:28,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-17 02:36:28,733 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-17 02:36:28,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:28,734 INFO L225 Difference]: With dead ends: 114 [2020-09-17 02:36:28,734 INFO L226 Difference]: Without dead ends: 108 [2020-09-17 02:36:28,734 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=462, Invalid=1098, Unknown=0, NotChecked=0, Total=1560 [2020-09-17 02:36:28,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-09-17 02:36:28,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 68. [2020-09-17 02:36:28,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-17 02:36:28,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 167 transitions. [2020-09-17 02:36:28,741 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 167 transitions. Word has length 25 [2020-09-17 02:36:28,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:28,741 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 167 transitions. [2020-09-17 02:36:28,742 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-17 02:36:28,742 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 167 transitions. [2020-09-17 02:36:28,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-17 02:36:28,742 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:28,742 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:28,950 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:28,950 INFO L427 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:28,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:28,951 INFO L82 PathProgramCache]: Analyzing trace with hash 2119386162, now seen corresponding path program 161 times [2020-09-17 02:36:28,951 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:28,951 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176858045] [2020-09-17 02:36:28,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:28,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:29,325 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:29,325 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176858045] [2020-09-17 02:36:29,325 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41218294] [2020-09-17 02:36:29,326 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 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:29,389 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-09-17 02:36:29,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:29,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-17 02:36:29,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:29,405 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:29,406 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:29,406 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-17 02:36:29,406 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105619897] [2020-09-17 02:36:29,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-17 02:36:29,406 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:29,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-17 02:36:29,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2020-09-17 02:36:29,407 INFO L87 Difference]: Start difference. First operand 68 states and 167 transitions. Second operand 21 states. [2020-09-17 02:36:30,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:30,149 INFO L93 Difference]: Finished difference Result 115 states and 263 transitions. [2020-09-17 02:36:30,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-17 02:36:30,150 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-17 02:36:30,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:30,151 INFO L225 Difference]: With dead ends: 115 [2020-09-17 02:36:30,151 INFO L226 Difference]: Without dead ends: 109 [2020-09-17 02:36:30,152 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=466, Invalid=1174, Unknown=0, NotChecked=0, Total=1640 [2020-09-17 02:36:30,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-09-17 02:36:30,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 71. [2020-09-17 02:36:30,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-17 02:36:30,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 175 transitions. [2020-09-17 02:36:30,154 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 175 transitions. Word has length 25 [2020-09-17 02:36:30,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:30,154 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 175 transitions. [2020-09-17 02:36:30,155 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-17 02:36:30,155 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 175 transitions. [2020-09-17 02:36:30,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-17 02:36:30,155 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:30,155 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:30,356 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:30,356 INFO L427 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:30,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:30,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1308837526, now seen corresponding path program 162 times [2020-09-17 02:36:30,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:30,357 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190934630] [2020-09-17 02:36:30,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:30,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:30,745 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:30,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190934630] [2020-09-17 02:36:30,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066825494] [2020-09-17 02:36:30,746 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 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:30,814 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-09-17 02:36:30,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:30,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-17 02:36:30,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:30,844 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:36:30,861 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:30,862 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:30,862 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-17 02:36:30,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510658769] [2020-09-17 02:36:30,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-17 02:36:30,862 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:30,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-17 02:36:30,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2020-09-17 02:36:30,863 INFO L87 Difference]: Start difference. First operand 71 states and 175 transitions. Second operand 22 states. [2020-09-17 02:36:31,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:31,607 INFO L93 Difference]: Finished difference Result 129 states and 291 transitions. [2020-09-17 02:36:31,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-17 02:36:31,608 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-17 02:36:31,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:31,609 INFO L225 Difference]: With dead ends: 129 [2020-09-17 02:36:31,609 INFO L226 Difference]: Without dead ends: 123 [2020-09-17 02:36:31,609 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=500, Invalid=1306, Unknown=0, NotChecked=0, Total=1806 [2020-09-17 02:36:31,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-09-17 02:36:31,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 70. [2020-09-17 02:36:31,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-17 02:36:31,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 173 transitions. [2020-09-17 02:36:31,612 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 173 transitions. Word has length 25 [2020-09-17 02:36:31,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:31,612 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 173 transitions. [2020-09-17 02:36:31,612 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-17 02:36:31,613 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 173 transitions. [2020-09-17 02:36:31,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-17 02:36:31,613 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:31,613 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:31,822 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:31,822 INFO L427 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:31,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:31,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1361114132, now seen corresponding path program 163 times [2020-09-17 02:36:31,823 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:31,823 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680013802] [2020-09-17 02:36:31,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:31,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:32,185 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:32,185 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680013802] [2020-09-17 02:36:32,185 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270603109] [2020-09-17 02:36:32,186 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 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:32,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:32,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-17 02:36:32,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:32,266 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:32,266 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:32,267 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-17 02:36:32,267 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936468026] [2020-09-17 02:36:32,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-17 02:36:32,267 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:32,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-17 02:36:32,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2020-09-17 02:36:32,267 INFO L87 Difference]: Start difference. First operand 70 states and 173 transitions. Second operand 21 states. [2020-09-17 02:36:33,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:33,092 INFO L93 Difference]: Finished difference Result 129 states and 293 transitions. [2020-09-17 02:36:33,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-17 02:36:33,093 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-17 02:36:33,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:33,093 INFO L225 Difference]: With dead ends: 129 [2020-09-17 02:36:33,094 INFO L226 Difference]: Without dead ends: 123 [2020-09-17 02:36:33,094 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=518, Invalid=1374, Unknown=0, NotChecked=0, Total=1892 [2020-09-17 02:36:33,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-09-17 02:36:33,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 73. [2020-09-17 02:36:33,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-09-17 02:36:33,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 181 transitions. [2020-09-17 02:36:33,096 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 181 transitions. Word has length 25 [2020-09-17 02:36:33,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:33,096 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 181 transitions. [2020-09-17 02:36:33,096 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-17 02:36:33,097 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 181 transitions. [2020-09-17 02:36:33,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-17 02:36:33,097 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:33,097 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:33,297 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:33,298 INFO L427 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:33,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:33,298 INFO L82 PathProgramCache]: Analyzing trace with hash -1057603720, now seen corresponding path program 164 times [2020-09-17 02:36:33,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:33,299 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769107950] [2020-09-17 02:36:33,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:33,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:33,663 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:33,663 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769107950] [2020-09-17 02:36:33,663 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141827457] [2020-09-17 02:36:33,663 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 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:33,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:36:33,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:33,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-17 02:36:33,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:33,759 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:36:33,780 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:33,781 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:33,781 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-17 02:36:33,781 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580310278] [2020-09-17 02:36:33,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-17 02:36:33,781 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:33,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-17 02:36:33,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-09-17 02:36:33,782 INFO L87 Difference]: Start difference. First operand 73 states and 181 transitions. Second operand 22 states. [2020-09-17 02:36:34,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:34,687 INFO L93 Difference]: Finished difference Result 126 states and 287 transitions. [2020-09-17 02:36:34,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-17 02:36:34,688 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-17 02:36:34,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:34,689 INFO L225 Difference]: With dead ends: 126 [2020-09-17 02:36:34,689 INFO L226 Difference]: Without dead ends: 120 [2020-09-17 02:36:34,690 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=523, Invalid=1457, Unknown=0, NotChecked=0, Total=1980 [2020-09-17 02:36:34,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-09-17 02:36:34,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 72. [2020-09-17 02:36:34,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-17 02:36:34,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 179 transitions. [2020-09-17 02:36:34,692 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 179 transitions. Word has length 25 [2020-09-17 02:36:34,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:34,692 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 179 transitions. [2020-09-17 02:36:34,692 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-17 02:36:34,693 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 179 transitions. [2020-09-17 02:36:34,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-17 02:36:34,693 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:34,693 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:34,893 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:34,894 INFO L427 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:34,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:34,894 INFO L82 PathProgramCache]: Analyzing trace with hash -369281930, now seen corresponding path program 165 times [2020-09-17 02:36:34,894 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:34,895 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832976274] [2020-09-17 02:36:34,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:34,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:35,250 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:35,250 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832976274] [2020-09-17 02:36:35,250 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072246095] [2020-09-17 02:36:35,250 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 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:35,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-17 02:36:35,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:35,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-17 02:36:35,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:35,338 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:35,339 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:35,339 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-17 02:36:35,339 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98417298] [2020-09-17 02:36:35,339 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-17 02:36:35,339 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:35,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-17 02:36:35,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-09-17 02:36:35,340 INFO L87 Difference]: Start difference. First operand 72 states and 179 transitions. Second operand 21 states. [2020-09-17 02:36:36,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:36,205 INFO L93 Difference]: Finished difference Result 127 states and 291 transitions. [2020-09-17 02:36:36,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-17 02:36:36,206 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-17 02:36:36,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:36,207 INFO L225 Difference]: With dead ends: 127 [2020-09-17 02:36:36,207 INFO L226 Difference]: Without dead ends: 121 [2020-09-17 02:36:36,207 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=556, Invalid=1514, Unknown=0, NotChecked=0, Total=2070 [2020-09-17 02:36:36,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-09-17 02:36:36,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 75. [2020-09-17 02:36:36,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-17 02:36:36,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 187 transitions. [2020-09-17 02:36:36,210 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 187 transitions. Word has length 25 [2020-09-17 02:36:36,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:36,210 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 187 transitions. [2020-09-17 02:36:36,210 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-17 02:36:36,210 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 187 transitions. [2020-09-17 02:36:36,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-17 02:36:36,210 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:36,211 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:36,411 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2020-09-17 02:36:36,411 INFO L427 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:36,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:36,412 INFO L82 PathProgramCache]: Analyzing trace with hash 615909594, now seen corresponding path program 166 times [2020-09-17 02:36:36,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:36,412 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387148577] [2020-09-17 02:36:36,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:36,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:36,759 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:36,760 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387148577] [2020-09-17 02:36:36,760 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111799731] [2020-09-17 02:36:36,760 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 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:36,827 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:36:36,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:36,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-17 02:36:36,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:36,860 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:36:36,877 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:36,877 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:36,878 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-17 02:36:36,878 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715688417] [2020-09-17 02:36:36,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-17 02:36:36,878 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:36,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-17 02:36:36,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-09-17 02:36:36,879 INFO L87 Difference]: Start difference. First operand 75 states and 187 transitions. Second operand 22 states. [2020-09-17 02:36:37,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:37,890 INFO L93 Difference]: Finished difference Result 124 states and 285 transitions. [2020-09-17 02:36:37,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-17 02:36:37,891 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-17 02:36:37,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:37,891 INFO L225 Difference]: With dead ends: 124 [2020-09-17 02:36:37,891 INFO L226 Difference]: Without dead ends: 118 [2020-09-17 02:36:37,892 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=562, Invalid=1600, Unknown=0, NotChecked=0, Total=2162 [2020-09-17 02:36:37,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-09-17 02:36:37,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 74. [2020-09-17 02:36:37,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-17 02:36:37,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 185 transitions. [2020-09-17 02:36:37,894 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 185 transitions. Word has length 25 [2020-09-17 02:36:37,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:37,895 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 185 transitions. [2020-09-17 02:36:37,895 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-17 02:36:37,895 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 185 transitions. [2020-09-17 02:36:37,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-17 02:36:37,895 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:37,895 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:38,096 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2020-09-17 02:36:38,096 INFO L427 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:38,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:38,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1001249448, now seen corresponding path program 167 times [2020-09-17 02:36:38,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:38,097 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836836743] [2020-09-17 02:36:38,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:38,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:38,401 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:38,402 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836836743] [2020-09-17 02:36:38,402 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151137808] [2020-09-17 02:36:38,402 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 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:38,468 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-09-17 02:36:38,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:38,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-17 02:36:38,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:38,489 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:38,489 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:38,489 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-17 02:36:38,489 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550698231] [2020-09-17 02:36:38,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-17 02:36:38,490 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:38,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-17 02:36:38,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-09-17 02:36:38,490 INFO L87 Difference]: Start difference. First operand 74 states and 185 transitions. Second operand 21 states. [2020-09-17 02:36:39,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:39,398 INFO L93 Difference]: Finished difference Result 125 states and 289 transitions. [2020-09-17 02:36:39,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-17 02:36:39,398 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-17 02:36:39,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:39,399 INFO L225 Difference]: With dead ends: 125 [2020-09-17 02:36:39,399 INFO L226 Difference]: Without dead ends: 119 [2020-09-17 02:36:39,399 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=610, Invalid=1646, Unknown=0, NotChecked=0, Total=2256 [2020-09-17 02:36:39,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-09-17 02:36:39,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 77. [2020-09-17 02:36:39,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-09-17 02:36:39,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 193 transitions. [2020-09-17 02:36:39,402 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 193 transitions. Word has length 25 [2020-09-17 02:36:39,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:39,402 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 193 transitions. [2020-09-17 02:36:39,402 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-17 02:36:39,402 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 193 transitions. [2020-09-17 02:36:39,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-17 02:36:39,402 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:39,402 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:39,603 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2020-09-17 02:36:39,603 INFO L427 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:39,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:39,604 INFO L82 PathProgramCache]: Analyzing trace with hash 255640252, now seen corresponding path program 168 times [2020-09-17 02:36:39,604 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:39,604 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767434108] [2020-09-17 02:36:39,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:39,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:39,938 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:39,939 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767434108] [2020-09-17 02:36:39,939 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968688553] [2020-09-17 02:36:39,939 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 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:40,009 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-09-17 02:36:40,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:40,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-17 02:36:40,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:40,040 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:36:40,058 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:40,059 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:40,059 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-17 02:36:40,059 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705112413] [2020-09-17 02:36:40,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-17 02:36:40,059 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:40,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-17 02:36:40,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2020-09-17 02:36:40,060 INFO L87 Difference]: Start difference. First operand 77 states and 193 transitions. Second operand 22 states. [2020-09-17 02:36:41,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:41,174 INFO L93 Difference]: Finished difference Result 122 states and 283 transitions. [2020-09-17 02:36:41,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-17 02:36:41,175 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-17 02:36:41,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:41,176 INFO L225 Difference]: With dead ends: 122 [2020-09-17 02:36:41,176 INFO L226 Difference]: Without dead ends: 116 [2020-09-17 02:36:41,177 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=617, Invalid=1735, Unknown=0, NotChecked=0, Total=2352 [2020-09-17 02:36:41,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-09-17 02:36:41,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 76. [2020-09-17 02:36:41,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-17 02:36:41,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 191 transitions. [2020-09-17 02:36:41,179 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 191 transitions. Word has length 25 [2020-09-17 02:36:41,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:41,179 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 191 transitions. [2020-09-17 02:36:41,179 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-17 02:36:41,179 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 191 transitions. [2020-09-17 02:36:41,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-17 02:36:41,180 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:41,180 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:41,380 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2020-09-17 02:36:41,381 INFO L427 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:41,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:41,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1871832762, now seen corresponding path program 169 times [2020-09-17 02:36:41,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:41,382 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366617501] [2020-09-17 02:36:41,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:41,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:41,706 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:41,706 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366617501] [2020-09-17 02:36:41,706 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864827108] [2020-09-17 02:36:41,707 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 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:41,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:41,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-17 02:36:41,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:41,791 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:41,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:41,791 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-17 02:36:41,791 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16982237] [2020-09-17 02:36:41,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-17 02:36:41,792 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:41,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-17 02:36:41,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2020-09-17 02:36:41,792 INFO L87 Difference]: Start difference. First operand 76 states and 191 transitions. Second operand 21 states. [2020-09-17 02:36:42,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:42,800 INFO L93 Difference]: Finished difference Result 123 states and 287 transitions. [2020-09-17 02:36:42,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-17 02:36:42,801 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-17 02:36:42,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:42,802 INFO L225 Difference]: With dead ends: 123 [2020-09-17 02:36:42,802 INFO L226 Difference]: Without dead ends: 117 [2020-09-17 02:36:42,803 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=680, Invalid=1770, Unknown=0, NotChecked=0, Total=2450 [2020-09-17 02:36:42,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-17 02:36:42,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 79. [2020-09-17 02:36:42,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-17 02:36:42,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 199 transitions. [2020-09-17 02:36:42,805 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 199 transitions. Word has length 25 [2020-09-17 02:36:42,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:42,806 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 199 transitions. [2020-09-17 02:36:42,806 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-17 02:36:42,806 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 199 transitions. [2020-09-17 02:36:42,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-17 02:36:42,806 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:42,806 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:43,006 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:43,007 INFO L427 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:43,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:43,007 INFO L82 PathProgramCache]: Analyzing trace with hash -1903391458, now seen corresponding path program 170 times [2020-09-17 02:36:43,008 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:43,008 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235738687] [2020-09-17 02:36:43,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:43,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:43,340 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:43,340 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235738687] [2020-09-17 02:36:43,340 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936083683] [2020-09-17 02:36:43,341 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 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:43,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:36:43,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:43,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-17 02:36:43,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:43,439 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:36:43,456 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:43,457 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:43,457 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-17 02:36:43,457 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255739559] [2020-09-17 02:36:43,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-17 02:36:43,458 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:43,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-17 02:36:43,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-09-17 02:36:43,458 INFO L87 Difference]: Start difference. First operand 79 states and 199 transitions. Second operand 22 states. [2020-09-17 02:36:44,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:44,677 INFO L93 Difference]: Finished difference Result 120 states and 281 transitions. [2020-09-17 02:36:44,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-17 02:36:44,678 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-17 02:36:44,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:44,679 INFO L225 Difference]: With dead ends: 120 [2020-09-17 02:36:44,679 INFO L226 Difference]: Without dead ends: 114 [2020-09-17 02:36:44,680 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=688, Invalid=1862, Unknown=0, NotChecked=0, Total=2550 [2020-09-17 02:36:44,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-09-17 02:36:44,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 78. [2020-09-17 02:36:44,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-17 02:36:44,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 197 transitions. [2020-09-17 02:36:44,682 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 197 transitions. Word has length 25 [2020-09-17 02:36:44,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:44,682 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 197 transitions. [2020-09-17 02:36:44,682 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-17 02:36:44,683 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 197 transitions. [2020-09-17 02:36:44,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-17 02:36:44,683 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:44,683 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:44,883 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:44,884 INFO L427 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:44,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:44,884 INFO L82 PathProgramCache]: Analyzing trace with hash -248080228, now seen corresponding path program 171 times [2020-09-17 02:36:44,885 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:44,885 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375314806] [2020-09-17 02:36:44,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:44,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:45,199 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:45,200 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375314806] [2020-09-17 02:36:45,200 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316950873] [2020-09-17 02:36:45,200 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 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:45,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-17 02:36:45,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:45,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-17 02:36:45,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:45,298 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:45,298 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:45,299 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-17 02:36:45,299 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405114549] [2020-09-17 02:36:45,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-17 02:36:45,299 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:45,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-17 02:36:45,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-09-17 02:36:45,300 INFO L87 Difference]: Start difference. First operand 78 states and 197 transitions. Second operand 21 states. [2020-09-17 02:36:46,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:46,395 INFO L93 Difference]: Finished difference Result 121 states and 285 transitions. [2020-09-17 02:36:46,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-17 02:36:46,395 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-17 02:36:46,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:46,396 INFO L225 Difference]: With dead ends: 121 [2020-09-17 02:36:46,396 INFO L226 Difference]: Without dead ends: 115 [2020-09-17 02:36:46,396 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=766, Invalid=1886, Unknown=0, NotChecked=0, Total=2652 [2020-09-17 02:36:46,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-09-17 02:36:46,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 81. [2020-09-17 02:36:46,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-17 02:36:46,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-17 02:36:46,399 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 25 [2020-09-17 02:36:46,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:46,399 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-17 02:36:46,399 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-17 02:36:46,399 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-17 02:36:46,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-17 02:36:46,399 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:46,399 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:46,600 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2020-09-17 02:36:46,600 INFO L427 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:46,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:46,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1968207872, now seen corresponding path program 172 times [2020-09-17 02:36:46,601 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:46,601 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892280737] [2020-09-17 02:36:46,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:46,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:46,901 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:46,902 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892280737] [2020-09-17 02:36:46,902 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927684141] [2020-09-17 02:36:46,902 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 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:46,966 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:36:46,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:46,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-17 02:36:46,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:47,013 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:36:47,030 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:47,031 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:47,031 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-17 02:36:47,031 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153688695] [2020-09-17 02:36:47,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-17 02:36:47,032 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:47,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-17 02:36:47,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-09-17 02:36:47,032 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 22 states. [2020-09-17 02:36:48,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:48,349 INFO L93 Difference]: Finished difference Result 118 states and 279 transitions. [2020-09-17 02:36:48,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-17 02:36:48,351 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-17 02:36:48,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:48,351 INFO L225 Difference]: With dead ends: 118 [2020-09-17 02:36:48,351 INFO L226 Difference]: Without dead ends: 112 [2020-09-17 02:36:48,352 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=775, Invalid=1981, Unknown=0, NotChecked=0, Total=2756 [2020-09-17 02:36:48,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-09-17 02:36:48,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 80. [2020-09-17 02:36:48,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-17 02:36:48,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-17 02:36:48,354 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 25 [2020-09-17 02:36:48,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:48,354 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-17 02:36:48,354 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-17 02:36:48,354 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-17 02:36:48,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-17 02:36:48,355 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:48,355 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:48,555 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:48,556 INFO L427 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:48,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:48,556 INFO L82 PathProgramCache]: Analyzing trace with hash -1497212162, now seen corresponding path program 173 times [2020-09-17 02:36:48,556 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:48,557 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63556661] [2020-09-17 02:36:48,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:48,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:48,864 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:48,865 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63556661] [2020-09-17 02:36:48,865 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727740330] [2020-09-17 02:36:48,865 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 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:48,930 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-09-17 02:36:48,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:48,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-17 02:36:48,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:48,969 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:48,970 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:48,970 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-17 02:36:48,970 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166548017] [2020-09-17 02:36:48,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-17 02:36:48,970 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:48,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-17 02:36:48,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-09-17 02:36:48,971 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 21 states. [2020-09-17 02:36:50,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:50,158 INFO L93 Difference]: Finished difference Result 119 states and 283 transitions. [2020-09-17 02:36:50,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-17 02:36:50,159 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-17 02:36:50,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:50,160 INFO L225 Difference]: With dead ends: 119 [2020-09-17 02:36:50,160 INFO L226 Difference]: Without dead ends: 113 [2020-09-17 02:36:50,161 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=868, Invalid=1994, Unknown=0, NotChecked=0, Total=2862 [2020-09-17 02:36:50,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-17 02:36:50,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 83. [2020-09-17 02:36:50,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-09-17 02:36:50,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 211 transitions. [2020-09-17 02:36:50,163 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 211 transitions. Word has length 25 [2020-09-17 02:36:50,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:50,163 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 211 transitions. [2020-09-17 02:36:50,164 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-17 02:36:50,164 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 211 transitions. [2020-09-17 02:36:50,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-17 02:36:50,164 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:50,164 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:50,364 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,171 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:50,365 INFO L427 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:50,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:50,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1481125022, now seen corresponding path program 174 times [2020-09-17 02:36:50,366 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:50,366 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299007345] [2020-09-17 02:36:50,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:50,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:50,680 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:50,681 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299007345] [2020-09-17 02:36:50,681 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582599920] [2020-09-17 02:36:50,681 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 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:50,749 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-09-17 02:36:50,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:50,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-17 02:36:50,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:50,789 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:36:50,813 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:50,814 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:50,814 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-17 02:36:50,814 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999914854] [2020-09-17 02:36:50,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-17 02:36:50,815 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:50,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-17 02:36:50,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2020-09-17 02:36:50,815 INFO L87 Difference]: Start difference. First operand 83 states and 211 transitions. Second operand 22 states. [2020-09-17 02:36:52,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:52,239 INFO L93 Difference]: Finished difference Result 116 states and 277 transitions. [2020-09-17 02:36:52,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-17 02:36:52,240 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-17 02:36:52,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:52,240 INFO L225 Difference]: With dead ends: 116 [2020-09-17 02:36:52,241 INFO L226 Difference]: Without dead ends: 110 [2020-09-17 02:36:52,241 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=878, Invalid=2092, Unknown=0, NotChecked=0, Total=2970 [2020-09-17 02:36:52,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-09-17 02:36:52,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 82. [2020-09-17 02:36:52,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-17 02:36:52,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 209 transitions. [2020-09-17 02:36:52,244 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 209 transitions. Word has length 25 [2020-09-17 02:36:52,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:52,244 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 209 transitions. [2020-09-17 02:36:52,244 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-17 02:36:52,245 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 209 transitions. [2020-09-17 02:36:52,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-17 02:36:52,245 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:52,245 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:52,451 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:52,451 INFO L427 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:52,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:52,452 INFO L82 PathProgramCache]: Analyzing trace with hash -1480634912, now seen corresponding path program 175 times [2020-09-17 02:36:52,452 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:52,452 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999801681] [2020-09-17 02:36:52,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:52,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:52,755 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:52,755 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999801681] [2020-09-17 02:36:52,756 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932874233] [2020-09-17 02:36:52,756 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 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:52,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:52,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-17 02:36:52,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:52,847 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:52,847 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:52,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-17 02:36:52,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581447435] [2020-09-17 02:36:52,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-17 02:36:52,848 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:52,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-17 02:36:52,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-09-17 02:36:52,849 INFO L87 Difference]: Start difference. First operand 82 states and 209 transitions. Second operand 21 states. [2020-09-17 02:36:54,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:54,081 INFO L93 Difference]: Finished difference Result 136 states and 327 transitions. [2020-09-17 02:36:54,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-17 02:36:54,082 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-17 02:36:54,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:54,083 INFO L225 Difference]: With dead ends: 136 [2020-09-17 02:36:54,083 INFO L226 Difference]: Without dead ends: 130 [2020-09-17 02:36:54,084 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=986, Invalid=2094, Unknown=0, NotChecked=0, Total=3080 [2020-09-17 02:36:54,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-09-17 02:36:54,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 88. [2020-09-17 02:36:54,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-09-17 02:36:54,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 229 transitions. [2020-09-17 02:36:54,086 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 229 transitions. Word has length 25 [2020-09-17 02:36:54,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:54,086 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 229 transitions. [2020-09-17 02:36:54,087 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-17 02:36:54,087 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 229 transitions. [2020-09-17 02:36:54,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-17 02:36:54,087 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:54,087 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:54,296 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:54,296 INFO L427 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:54,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:54,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1480618172, now seen corresponding path program 176 times [2020-09-17 02:36:54,297 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:54,297 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636916477] [2020-09-17 02:36:54,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:54,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:54,605 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:54,605 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636916477] [2020-09-17 02:36:54,606 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819202114] [2020-09-17 02:36:54,606 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 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:54,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:36:54,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:54,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-17 02:36:54,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:54,699 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:36:54,720 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:54,720 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:54,721 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-17 02:36:54,721 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436281278] [2020-09-17 02:36:54,721 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-17 02:36:54,721 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:54,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-17 02:36:54,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2020-09-17 02:36:54,721 INFO L87 Difference]: Start difference. First operand 88 states and 229 transitions. Second operand 22 states. [2020-09-17 02:36:56,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:56,229 INFO L93 Difference]: Finished difference Result 117 states and 283 transitions. [2020-09-17 02:36:56,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-17 02:36:56,230 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-17 02:36:56,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:56,230 INFO L225 Difference]: With dead ends: 117 [2020-09-17 02:36:56,230 INFO L226 Difference]: Without dead ends: 109 [2020-09-17 02:36:56,230 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=997, Invalid=2195, Unknown=0, NotChecked=0, Total=3192 [2020-09-17 02:36:56,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-09-17 02:36:56,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 85. [2020-09-17 02:36:56,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-09-17 02:36:56,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 217 transitions. [2020-09-17 02:36:56,232 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 217 transitions. Word has length 25 [2020-09-17 02:36:56,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:56,232 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 217 transitions. [2020-09-17 02:36:56,232 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-17 02:36:56,232 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 217 transitions. [2020-09-17 02:36:56,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-17 02:36:56,233 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:56,233 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:56,433 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:56,434 INFO L427 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:56,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:56,434 INFO L82 PathProgramCache]: Analyzing trace with hash 601326971, now seen corresponding path program 177 times [2020-09-17 02:36:56,435 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:56,435 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209537659] [2020-09-17 02:36:56,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:56,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:56,867 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:56,868 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209537659] [2020-09-17 02:36:56,868 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201783471] [2020-09-17 02:36:56,868 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 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:56,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-17 02:36:56,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:56,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-17 02:36:56,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:56,952 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:56,952 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:56,952 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-17 02:36:56,953 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59004052] [2020-09-17 02:36:56,953 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-17 02:36:56,953 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:56,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-17 02:36:56,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-09-17 02:36:56,953 INFO L87 Difference]: Start difference. First operand 85 states and 217 transitions. Second operand 22 states. [2020-09-17 02:36:57,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:57,680 INFO L93 Difference]: Finished difference Result 134 states and 315 transitions. [2020-09-17 02:36:57,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-17 02:36:57,681 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-17 02:36:57,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:57,681 INFO L225 Difference]: With dead ends: 134 [2020-09-17 02:36:57,681 INFO L226 Difference]: Without dead ends: 128 [2020-09-17 02:36:57,682 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=499, Invalid=1141, Unknown=0, NotChecked=0, Total=1640 [2020-09-17 02:36:57,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-09-17 02:36:57,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 87. [2020-09-17 02:36:57,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-17 02:36:57,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-17 02:36:57,684 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-17 02:36:57,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:57,684 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-17 02:36:57,684 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-17 02:36:57,684 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-17 02:36:57,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-17 02:36:57,685 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:57,685 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:57,885 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2020-09-17 02:36:57,886 INFO L427 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:57,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:57,886 INFO L82 PathProgramCache]: Analyzing trace with hash -946831649, now seen corresponding path program 178 times [2020-09-17 02:36:57,886 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:57,887 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118077306] [2020-09-17 02:36:57,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:57,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:58,321 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:58,321 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118077306] [2020-09-17 02:36:58,322 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713987634] [2020-09-17 02:36:58,322 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 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:58,386 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:36:58,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:58,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-17 02:36:58,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:58,416 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:36:58,429 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:58,429 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:58,430 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-17 02:36:58,430 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675924239] [2020-09-17 02:36:58,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-17 02:36:58,430 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:58,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-17 02:36:58,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2020-09-17 02:36:58,430 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-17 02:36:59,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:59,260 INFO L93 Difference]: Finished difference Result 131 states and 309 transitions. [2020-09-17 02:36:59,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-17 02:36:59,261 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-17 02:36:59,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:59,261 INFO L225 Difference]: With dead ends: 131 [2020-09-17 02:36:59,261 INFO L226 Difference]: Without dead ends: 125 [2020-09-17 02:36:59,262 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=546, Invalid=1346, Unknown=0, NotChecked=0, Total=1892 [2020-09-17 02:36:59,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-09-17 02:36:59,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 86. [2020-09-17 02:36:59,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-17 02:36:59,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-17 02:36:59,264 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-17 02:36:59,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:59,265 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-17 02:36:59,265 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-17 02:36:59,265 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-17 02:36:59,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-17 02:36:59,265 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:59,265 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:59,465 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2020-09-17 02:36:59,466 INFO L427 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:59,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:59,466 INFO L82 PathProgramCache]: Analyzing trace with hash 2046346461, now seen corresponding path program 179 times [2020-09-17 02:36:59,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:59,467 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711403709] [2020-09-17 02:36:59,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:59,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:59,882 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:59,883 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711403709] [2020-09-17 02:36:59,883 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401492081] [2020-09-17 02:36:59,883 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 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:59,949 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-09-17 02:36:59,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:59,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-17 02:36:59,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:59,971 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:59,971 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:59,972 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-17 02:36:59,972 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252676919] [2020-09-17 02:36:59,972 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-17 02:36:59,972 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:59,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-17 02:36:59,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2020-09-17 02:36:59,973 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-17 02:37:00,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:00,753 INFO L93 Difference]: Finished difference Result 128 states and 303 transitions. [2020-09-17 02:37:00,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-17 02:37:00,754 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-17 02:37:00,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:00,755 INFO L225 Difference]: With dead ends: 128 [2020-09-17 02:37:00,755 INFO L226 Difference]: Without dead ends: 122 [2020-09-17 02:37:00,755 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=506, Invalid=1300, Unknown=0, NotChecked=0, Total=1806 [2020-09-17 02:37:00,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-09-17 02:37:00,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 87. [2020-09-17 02:37:00,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-17 02:37:00,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-17 02:37:00,758 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-17 02:37:00,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:00,758 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-17 02:37:00,758 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-17 02:37:00,758 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-17 02:37:00,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-17 02:37:00,758 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:00,758 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:00,959 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:37:00,959 INFO L427 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:00,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:00,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1235797825, now seen corresponding path program 180 times [2020-09-17 02:37:00,960 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:00,960 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35204808] [2020-09-17 02:37:00,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:00,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:01,381 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:01,381 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35204808] [2020-09-17 02:37:01,381 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121986704] [2020-09-17 02:37:01,382 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 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:37:01,448 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-09-17 02:37:01,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:37:01,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-17 02:37:01,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:01,481 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:37:01,497 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:01,498 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:01,498 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-17 02:37:01,498 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373607691] [2020-09-17 02:37:01,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-17 02:37:01,498 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:01,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-17 02:37:01,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2020-09-17 02:37:01,499 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-17 02:37:02,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:02,440 INFO L93 Difference]: Finished difference Result 127 states and 301 transitions. [2020-09-17 02:37:02,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-17 02:37:02,442 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-17 02:37:02,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:02,442 INFO L225 Difference]: With dead ends: 127 [2020-09-17 02:37:02,442 INFO L226 Difference]: Without dead ends: 121 [2020-09-17 02:37:02,443 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=560, Invalid=1510, Unknown=0, NotChecked=0, Total=2070 [2020-09-17 02:37:02,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-09-17 02:37:02,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 86. [2020-09-17 02:37:02,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-17 02:37:02,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-17 02:37:02,445 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-17 02:37:02,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:02,445 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-17 02:37:02,446 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-17 02:37:02,446 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-17 02:37:02,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-17 02:37:02,446 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:02,446 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:02,646 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable181 [2020-09-17 02:37:02,647 INFO L427 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:02,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:02,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1288074431, now seen corresponding path program 181 times [2020-09-17 02:37:02,648 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:02,648 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846673755] [2020-09-17 02:37:02,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:02,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:03,042 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:03,043 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846673755] [2020-09-17 02:37:03,043 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930588421] [2020-09-17 02:37:03,043 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 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:37:03,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:03,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-17 02:37:03,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:03,124 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:03,124 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:03,125 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-17 02:37:03,125 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215261944] [2020-09-17 02:37:03,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-17 02:37:03,125 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:03,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-17 02:37:03,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2020-09-17 02:37:03,126 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-17 02:37:03,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:03,989 INFO L93 Difference]: Finished difference Result 124 states and 295 transitions. [2020-09-17 02:37:03,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-17 02:37:03,990 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-17 02:37:03,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:03,991 INFO L225 Difference]: With dead ends: 124 [2020-09-17 02:37:03,991 INFO L226 Difference]: Without dead ends: 118 [2020-09-17 02:37:03,991 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=529, Invalid=1451, Unknown=0, NotChecked=0, Total=1980 [2020-09-17 02:37:03,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-09-17 02:37:03,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 87. [2020-09-17 02:37:03,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-17 02:37:03,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-17 02:37:03,993 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-17 02:37:03,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:03,993 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-17 02:37:03,993 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-17 02:37:03,993 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-17 02:37:03,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-17 02:37:03,994 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:03,994 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:04,194 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:37:04,195 INFO L427 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:04,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:04,195 INFO L82 PathProgramCache]: Analyzing trace with hash -1130643421, now seen corresponding path program 182 times [2020-09-17 02:37:04,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:04,196 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325903565] [2020-09-17 02:37:04,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:04,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:04,591 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:04,591 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325903565] [2020-09-17 02:37:04,591 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756913681] [2020-09-17 02:37:04,592 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 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:37:04,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:37:04,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:37:04,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-17 02:37:04,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:04,695 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:37:04,711 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:04,711 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:04,711 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-17 02:37:04,712 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696792392] [2020-09-17 02:37:04,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-17 02:37:04,712 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:04,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-17 02:37:04,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2020-09-17 02:37:04,712 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-17 02:37:05,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:05,797 INFO L93 Difference]: Finished difference Result 123 states and 293 transitions. [2020-09-17 02:37:05,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-17 02:37:05,798 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-17 02:37:05,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:05,799 INFO L225 Difference]: With dead ends: 123 [2020-09-17 02:37:05,799 INFO L226 Difference]: Without dead ends: 117 [2020-09-17 02:37:05,799 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=590, Invalid=1666, Unknown=0, NotChecked=0, Total=2256 [2020-09-17 02:37:05,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-17 02:37:05,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 86. [2020-09-17 02:37:05,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-17 02:37:05,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-17 02:37:05,802 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-17 02:37:05,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:05,802 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-17 02:37:05,802 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-17 02:37:05,802 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-17 02:37:05,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-17 02:37:05,803 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:05,803 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:06,003 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:37:06,004 INFO L427 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:06,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:06,004 INFO L82 PathProgramCache]: Analyzing trace with hash -442321631, now seen corresponding path program 183 times [2020-09-17 02:37:06,005 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:06,005 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259330154] [2020-09-17 02:37:06,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:06,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:06,378 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:06,378 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259330154] [2020-09-17 02:37:06,378 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800681330] [2020-09-17 02:37:06,379 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 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:37:06,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-17 02:37:06,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:37:06,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-17 02:37:06,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:06,466 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:06,467 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:06,467 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-17 02:37:06,467 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797877648] [2020-09-17 02:37:06,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-17 02:37:06,467 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:06,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-17 02:37:06,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-09-17 02:37:06,468 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-17 02:37:07,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:07,430 INFO L93 Difference]: Finished difference Result 120 states and 287 transitions. [2020-09-17 02:37:07,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-17 02:37:07,431 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-17 02:37:07,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:07,431 INFO L225 Difference]: With dead ends: 120 [2020-09-17 02:37:07,432 INFO L226 Difference]: Without dead ends: 114 [2020-09-17 02:37:07,432 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=568, Invalid=1594, Unknown=0, NotChecked=0, Total=2162 [2020-09-17 02:37:07,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-09-17 02:37:07,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 87. [2020-09-17 02:37:07,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-17 02:37:07,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-17 02:37:07,435 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-17 02:37:07,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:07,435 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-17 02:37:07,435 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-17 02:37:07,435 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-17 02:37:07,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-17 02:37:07,436 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:07,436 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:07,636 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:37:07,636 INFO L427 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:07,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:07,637 INFO L82 PathProgramCache]: Analyzing trace with hash 542869893, now seen corresponding path program 184 times [2020-09-17 02:37:07,637 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:07,637 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898575622] [2020-09-17 02:37:07,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:07,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:08,017 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:08,017 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898575622] [2020-09-17 02:37:08,017 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817223682] [2020-09-17 02:37:08,017 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 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:37:08,073 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:37:08,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:37:08,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-17 02:37:08,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:08,102 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:37:08,121 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:08,121 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:08,121 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-17 02:37:08,122 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449059993] [2020-09-17 02:37:08,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-17 02:37:08,122 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:08,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-17 02:37:08,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2020-09-17 02:37:08,122 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-17 02:37:09,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:09,348 INFO L93 Difference]: Finished difference Result 119 states and 285 transitions. [2020-09-17 02:37:09,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-17 02:37:09,349 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-17 02:37:09,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:09,350 INFO L225 Difference]: With dead ends: 119 [2020-09-17 02:37:09,350 INFO L226 Difference]: Without dead ends: 113 [2020-09-17 02:37:09,351 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=636, Invalid=1814, Unknown=0, NotChecked=0, Total=2450 [2020-09-17 02:37:09,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-17 02:37:09,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 86. [2020-09-17 02:37:09,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-17 02:37:09,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-17 02:37:09,353 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-17 02:37:09,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:09,354 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-17 02:37:09,354 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-17 02:37:09,354 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-17 02:37:09,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-17 02:37:09,354 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:09,354 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:09,564 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:37:09,564 INFO L427 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:09,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:09,564 INFO L82 PathProgramCache]: Analyzing trace with hash -1074289149, now seen corresponding path program 185 times [2020-09-17 02:37:09,565 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:09,565 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002098851] [2020-09-17 02:37:09,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:09,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:09,931 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:09,932 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002098851] [2020-09-17 02:37:09,932 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187444195] [2020-09-17 02:37:09,932 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 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:37:09,999 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-09-17 02:37:09,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:37:10,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-17 02:37:10,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:10,023 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:10,023 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:10,023 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-17 02:37:10,025 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308346637] [2020-09-17 02:37:10,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-17 02:37:10,026 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:10,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-17 02:37:10,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2020-09-17 02:37:10,026 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-17 02:37:11,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:11,066 INFO L93 Difference]: Finished difference Result 116 states and 279 transitions. [2020-09-17 02:37:11,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-17 02:37:11,067 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-17 02:37:11,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:11,068 INFO L225 Difference]: With dead ends: 116 [2020-09-17 02:37:11,068 INFO L226 Difference]: Without dead ends: 110 [2020-09-17 02:37:11,068 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=623, Invalid=1729, Unknown=0, NotChecked=0, Total=2352 [2020-09-17 02:37:11,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-09-17 02:37:11,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 87. [2020-09-17 02:37:11,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-17 02:37:11,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-17 02:37:11,070 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-17 02:37:11,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:11,070 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-17 02:37:11,070 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-17 02:37:11,070 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-17 02:37:11,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-17 02:37:11,071 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:11,071 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:11,271 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable186 [2020-09-17 02:37:11,271 INFO L427 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:11,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:11,272 INFO L82 PathProgramCache]: Analyzing trace with hash 182600551, now seen corresponding path program 186 times [2020-09-17 02:37:11,272 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:11,272 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220965890] [2020-09-17 02:37:11,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:11,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:11,640 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:11,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220965890] [2020-09-17 02:37:11,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652566621] [2020-09-17 02:37:11,640 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 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:37:11,707 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-09-17 02:37:11,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:37:11,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-17 02:37:11,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:11,740 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:37:11,757 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:11,757 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:11,757 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-17 02:37:11,757 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874828903] [2020-09-17 02:37:11,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-17 02:37:11,758 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:11,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-17 02:37:11,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2020-09-17 02:37:11,758 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-17 02:37:13,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:13,082 INFO L93 Difference]: Finished difference Result 115 states and 277 transitions. [2020-09-17 02:37:13,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-17 02:37:13,083 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-17 02:37:13,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:13,084 INFO L225 Difference]: With dead ends: 115 [2020-09-17 02:37:13,084 INFO L226 Difference]: Without dead ends: 109 [2020-09-17 02:37:13,085 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=698, Invalid=1954, Unknown=0, NotChecked=0, Total=2652 [2020-09-17 02:37:13,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-09-17 02:37:13,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 86. [2020-09-17 02:37:13,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-17 02:37:13,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-17 02:37:13,087 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-17 02:37:13,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:13,088 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-17 02:37:13,088 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-17 02:37:13,088 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-17 02:37:13,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-17 02:37:13,088 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:13,088 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:13,298 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:37:13,298 INFO L427 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:13,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:13,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1798793061, now seen corresponding path program 187 times [2020-09-17 02:37:13,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:13,299 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146786559] [2020-09-17 02:37:13,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:13,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:13,647 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:13,647 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146786559] [2020-09-17 02:37:13,648 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225657748] [2020-09-17 02:37:13,648 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 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:37:13,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:13,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-17 02:37:13,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:13,735 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:13,735 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:13,735 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-17 02:37:13,735 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415771241] [2020-09-17 02:37:13,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-17 02:37:13,736 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:13,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-17 02:37:13,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-09-17 02:37:13,736 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-17 02:37:14,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:14,871 INFO L93 Difference]: Finished difference Result 112 states and 271 transitions. [2020-09-17 02:37:14,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-17 02:37:14,872 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-17 02:37:14,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:14,873 INFO L225 Difference]: With dead ends: 112 [2020-09-17 02:37:14,873 INFO L226 Difference]: Without dead ends: 106 [2020-09-17 02:37:14,874 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=694, Invalid=1856, Unknown=0, NotChecked=0, Total=2550 [2020-09-17 02:37:14,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-09-17 02:37:14,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 87. [2020-09-17 02:37:14,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-17 02:37:14,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-17 02:37:14,876 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-17 02:37:14,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:14,876 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-17 02:37:14,876 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-17 02:37:14,876 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-17 02:37:14,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-17 02:37:14,877 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:14,877 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:15,077 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2020-09-17 02:37:15,078 INFO L427 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:15,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:15,078 INFO L82 PathProgramCache]: Analyzing trace with hash -1976431159, now seen corresponding path program 188 times [2020-09-17 02:37:15,078 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:15,079 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117706467] [2020-09-17 02:37:15,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:15,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:15,445 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:15,446 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117706467] [2020-09-17 02:37:15,446 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65856252] [2020-09-17 02:37:15,446 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 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:37:15,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:37:15,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:37:15,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-17 02:37:15,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:15,542 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:37:15,563 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:15,563 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:15,563 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-17 02:37:15,564 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10392942] [2020-09-17 02:37:15,564 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-17 02:37:15,564 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:15,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-17 02:37:15,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2020-09-17 02:37:15,564 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-17 02:37:16,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:16,998 INFO L93 Difference]: Finished difference Result 111 states and 269 transitions. [2020-09-17 02:37:16,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-17 02:37:17,000 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-17 02:37:17,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:17,000 INFO L225 Difference]: With dead ends: 111 [2020-09-17 02:37:17,000 INFO L226 Difference]: Without dead ends: 105 [2020-09-17 02:37:17,001 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=776, Invalid=2086, Unknown=0, NotChecked=0, Total=2862 [2020-09-17 02:37:17,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-09-17 02:37:17,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 86. [2020-09-17 02:37:17,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-17 02:37:17,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-17 02:37:17,003 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-17 02:37:17,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:17,003 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-17 02:37:17,003 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-17 02:37:17,003 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-17 02:37:17,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-17 02:37:17,004 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:17,004 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:17,204 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2020-09-17 02:37:17,204 INFO L427 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:17,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:17,205 INFO L82 PathProgramCache]: Analyzing trace with hash -321119929, now seen corresponding path program 189 times [2020-09-17 02:37:17,205 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:17,205 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524220768] [2020-09-17 02:37:17,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:17,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:17,562 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:17,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524220768] [2020-09-17 02:37:17,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147803325] [2020-09-17 02:37:17,562 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 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:37:17,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-17 02:37:17,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:37:17,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-17 02:37:17,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:17,657 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:17,658 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:17,658 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-17 02:37:17,658 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045516828] [2020-09-17 02:37:17,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-17 02:37:17,658 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:17,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-17 02:37:17,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2020-09-17 02:37:17,659 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-17 02:37:18,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:18,877 INFO L93 Difference]: Finished difference Result 108 states and 263 transitions. [2020-09-17 02:37:18,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-17 02:37:18,878 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-17 02:37:18,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:18,878 INFO L225 Difference]: With dead ends: 108 [2020-09-17 02:37:18,879 INFO L226 Difference]: Without dead ends: 102 [2020-09-17 02:37:18,879 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=781, Invalid=1975, Unknown=0, NotChecked=0, Total=2756 [2020-09-17 02:37:18,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-09-17 02:37:18,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 87. [2020-09-17 02:37:18,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-17 02:37:18,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-17 02:37:18,881 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-17 02:37:18,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:18,882 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-17 02:37:18,882 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-17 02:37:18,882 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-17 02:37:18,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-17 02:37:18,882 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:18,882 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:19,083 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:37:19,084 INFO L427 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:19,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:19,085 INFO L82 PathProgramCache]: Analyzing trace with hash -2041247573, now seen corresponding path program 190 times [2020-09-17 02:37:19,085 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:19,085 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397061701] [2020-09-17 02:37:19,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:19,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:19,428 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:19,428 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397061701] [2020-09-17 02:37:19,429 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873829351] [2020-09-17 02:37:19,429 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 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:37:19,489 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:37:19,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:37:19,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-17 02:37:19,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:19,524 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:37:19,544 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:19,544 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:19,544 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-17 02:37:19,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643062109] [2020-09-17 02:37:19,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-17 02:37:19,545 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:19,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-17 02:37:19,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2020-09-17 02:37:19,545 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-17 02:37:21,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:21,137 INFO L93 Difference]: Finished difference Result 107 states and 261 transitions. [2020-09-17 02:37:21,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-17 02:37:21,138 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-17 02:37:21,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:21,138 INFO L225 Difference]: With dead ends: 107 [2020-09-17 02:37:21,139 INFO L226 Difference]: Without dead ends: 101 [2020-09-17 02:37:21,139 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=870, Invalid=2210, Unknown=0, NotChecked=0, Total=3080 [2020-09-17 02:37:21,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-17 02:37:21,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 86. [2020-09-17 02:37:21,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-17 02:37:21,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-17 02:37:21,142 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-17 02:37:21,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:21,142 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-17 02:37:21,142 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-17 02:37:21,143 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-17 02:37:21,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-17 02:37:21,143 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:21,143 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:21,348 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:37:21,348 INFO L427 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:21,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:21,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1570251863, now seen corresponding path program 191 times [2020-09-17 02:37:21,349 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:21,349 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670987985] [2020-09-17 02:37:21,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:21,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:21,690 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:21,690 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670987985] [2020-09-17 02:37:21,691 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019774161] [2020-09-17 02:37:21,691 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 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:37:21,758 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-09-17 02:37:21,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:37:21,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-17 02:37:21,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:21,788 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:21,789 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:21,789 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-17 02:37:21,789 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804328962] [2020-09-17 02:37:21,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-17 02:37:21,790 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:21,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-17 02:37:21,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2020-09-17 02:37:21,790 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-17 02:37:23,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:23,114 INFO L93 Difference]: Finished difference Result 104 states and 255 transitions. [2020-09-17 02:37:23,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-17 02:37:23,115 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-17 02:37:23,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:23,116 INFO L225 Difference]: With dead ends: 104 [2020-09-17 02:37:23,116 INFO L226 Difference]: Without dead ends: 98 [2020-09-17 02:37:23,116 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=884, Invalid=2086, Unknown=0, NotChecked=0, Total=2970 [2020-09-17 02:37:23,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-17 02:37:23,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 87. [2020-09-17 02:37:23,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-17 02:37:23,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-17 02:37:23,118 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-17 02:37:23,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:23,118 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-17 02:37:23,118 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-17 02:37:23,118 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-17 02:37:23,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-17 02:37:23,119 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:23,119 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:23,319 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:37:23,320 INFO L427 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:23,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:23,320 INFO L82 PathProgramCache]: Analyzing trace with hash -1554164723, now seen corresponding path program 192 times [2020-09-17 02:37:23,320 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:23,321 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897286474] [2020-09-17 02:37:23,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:23,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:23,682 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:23,682 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897286474] [2020-09-17 02:37:23,682 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004902131] [2020-09-17 02:37:23,683 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 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:37:23,759 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-09-17 02:37:23,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:37:23,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-17 02:37:23,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:23,792 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:37:23,814 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:23,814 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:23,814 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-17 02:37:23,814 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196537036] [2020-09-17 02:37:23,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-17 02:37:23,814 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:23,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-17 02:37:23,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2020-09-17 02:37:23,815 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-17 02:37:25,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:25,512 INFO L93 Difference]: Finished difference Result 103 states and 253 transitions. [2020-09-17 02:37:25,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-17 02:37:25,513 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-17 02:37:25,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:25,513 INFO L225 Difference]: With dead ends: 103 [2020-09-17 02:37:25,513 INFO L226 Difference]: Without dead ends: 97 [2020-09-17 02:37:25,514 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=980, Invalid=2326, Unknown=0, NotChecked=0, Total=3306 [2020-09-17 02:37:25,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-09-17 02:37:25,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 86. [2020-09-17 02:37:25,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-17 02:37:25,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-17 02:37:25,517 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-17 02:37:25,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:25,518 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-17 02:37:25,518 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-17 02:37:25,518 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-17 02:37:25,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-17 02:37:25,518 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:25,518 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:25,727 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable193 [2020-09-17 02:37:25,727 INFO L427 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:25,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:25,728 INFO L82 PathProgramCache]: Analyzing trace with hash -1553674613, now seen corresponding path program 193 times [2020-09-17 02:37:25,728 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:25,728 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467351019] [2020-09-17 02:37:25,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:25,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:26,073 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:26,073 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467351019] [2020-09-17 02:37:26,073 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654231485] [2020-09-17 02:37:26,074 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 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:37:26,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:26,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-17 02:37:26,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:26,170 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:26,171 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:26,171 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-17 02:37:26,171 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822003993] [2020-09-17 02:37:26,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-17 02:37:26,172 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:26,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-17 02:37:26,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-09-17 02:37:26,172 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-17 02:37:27,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:27,570 INFO L93 Difference]: Finished difference Result 119 states and 293 transitions. [2020-09-17 02:37:27,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-17 02:37:27,571 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-17 02:37:27,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:27,572 INFO L225 Difference]: With dead ends: 119 [2020-09-17 02:37:27,572 INFO L226 Difference]: Without dead ends: 113 [2020-09-17 02:37:27,573 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1003, Invalid=2189, Unknown=0, NotChecked=0, Total=3192 [2020-09-17 02:37:27,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-17 02:37:27,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 90. [2020-09-17 02:37:27,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-09-17 02:37:27,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 233 transitions. [2020-09-17 02:37:27,575 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 233 transitions. Word has length 26 [2020-09-17 02:37:27,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:27,575 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 233 transitions. [2020-09-17 02:37:27,575 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-17 02:37:27,576 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 233 transitions. [2020-09-17 02:37:27,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-17 02:37:27,576 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:27,576 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:27,776 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:37:27,777 INFO L427 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:27,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:27,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1553657873, now seen corresponding path program 194 times [2020-09-17 02:37:27,778 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:27,778 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337411111] [2020-09-17 02:37:27,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:27,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:28,122 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:28,123 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337411111] [2020-09-17 02:37:28,123 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104980879] [2020-09-17 02:37:28,123 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 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:37:28,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:37:28,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:37:28,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-17 02:37:28,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:28,224 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:37:28,248 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:28,248 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:28,248 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-17 02:37:28,249 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468821204] [2020-09-17 02:37:28,249 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-17 02:37:28,249 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:28,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-17 02:37:28,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2020-09-17 02:37:28,249 INFO L87 Difference]: Start difference. First operand 90 states and 233 transitions. Second operand 23 states. [2020-09-17 02:37:30,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:30,020 INFO L93 Difference]: Finished difference Result 100 states and 249 transitions. [2020-09-17 02:37:30,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-17 02:37:30,020 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-17 02:37:30,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:30,021 INFO L225 Difference]: With dead ends: 100 [2020-09-17 02:37:30,021 INFO L226 Difference]: Without dead ends: 92 [2020-09-17 02:37:30,021 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 911 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1106, Invalid=2434, Unknown=0, NotChecked=0, Total=3540 [2020-09-17 02:37:30,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-09-17 02:37:30,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 65. [2020-09-17 02:37:30,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-09-17 02:37:30,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 158 transitions. [2020-09-17 02:37:30,023 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 158 transitions. Word has length 26 [2020-09-17 02:37:30,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:30,024 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 158 transitions. [2020-09-17 02:37:30,024 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-17 02:37:30,024 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 158 transitions. [2020-09-17 02:37:30,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-17 02:37:30,024 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:30,024 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:30,224 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:37:30,225 INFO L427 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:30,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:30,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1345493231, now seen corresponding path program 195 times [2020-09-17 02:37:30,226 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:30,226 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370688543] [2020-09-17 02:37:30,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:30,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:30,578 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:30,578 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370688543] [2020-09-17 02:37:30,579 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495251421] [2020-09-17 02:37:30,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:37:30,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-17 02:37:30,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:37:30,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-17 02:37:30,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:30,684 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:37:30,719 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:30,719 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:30,719 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-17 02:37:30,719 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495835849] [2020-09-17 02:37:30,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-17 02:37:30,720 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:30,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-17 02:37:30,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2020-09-17 02:37:30,721 INFO L87 Difference]: Start difference. First operand 65 states and 158 transitions. Second operand 23 states. [2020-09-17 02:37:32,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:32,363 INFO L93 Difference]: Finished difference Result 116 states and 283 transitions. [2020-09-17 02:37:32,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-17 02:37:32,365 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-17 02:37:32,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:32,365 INFO L225 Difference]: With dead ends: 116 [2020-09-17 02:37:32,365 INFO L226 Difference]: Without dead ends: 111 [2020-09-17 02:37:32,366 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1153, Invalid=2387, Unknown=0, NotChecked=0, Total=3540 [2020-09-17 02:37:32,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-09-17 02:37:32,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 88. [2020-09-17 02:37:32,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-09-17 02:37:32,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 225 transitions. [2020-09-17 02:37:32,368 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 225 transitions. Word has length 26 [2020-09-17 02:37:32,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:32,368 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 225 transitions. [2020-09-17 02:37:32,368 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-17 02:37:32,368 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 225 transitions. [2020-09-17 02:37:32,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-17 02:37:32,369 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:32,369 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:32,573 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:37:32,573 INFO L427 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:32,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:32,574 INFO L82 PathProgramCache]: Analyzing trace with hash -918737500, now seen corresponding path program 196 times [2020-09-17 02:37:32,574 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:32,574 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266081778] [2020-09-17 02:37:32,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:32,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:32,956 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:32,956 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266081778] [2020-09-17 02:37:32,956 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687557439] [2020-09-17 02:37:32,957 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 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:37:33,022 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:37:33,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:37:33,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-17 02:37:33,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:33,058 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:37:33,086 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:33,087 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:33,087 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-17 02:37:33,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236325531] [2020-09-17 02:37:33,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-17 02:37:33,088 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:33,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-17 02:37:33,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:37:33,088 INFO L87 Difference]: Start difference. First operand 88 states and 225 transitions. Second operand 24 states. [2020-09-17 02:37:34,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:34,860 INFO L93 Difference]: Finished difference Result 96 states and 245 transitions. [2020-09-17 02:37:34,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-17 02:37:34,861 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-17 02:37:34,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:34,861 INFO L225 Difference]: With dead ends: 96 [2020-09-17 02:37:34,861 INFO L226 Difference]: Without dead ends: 91 [2020-09-17 02:37:34,862 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 942 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1171, Invalid=2489, Unknown=0, NotChecked=0, Total=3660 [2020-09-17 02:37:34,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-09-17 02:37:34,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 66. [2020-09-17 02:37:34,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-17 02:37:34,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 162 transitions. [2020-09-17 02:37:34,865 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 162 transitions. Word has length 27 [2020-09-17 02:37:34,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:34,865 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 162 transitions. [2020-09-17 02:37:34,865 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-17 02:37:34,866 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 162 transitions. [2020-09-17 02:37:34,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-17 02:37:34,866 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:34,866 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:35,067 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:37:35,067 INFO L427 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:35,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:35,068 INFO L82 PathProgramCache]: Analyzing trace with hash -473673969, now seen corresponding path program 197 times [2020-09-17 02:37:35,068 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:35,068 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905617787] [2020-09-17 02:37:35,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:35,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:35,549 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:35,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905617787] [2020-09-17 02:37:35,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718582429] [2020-09-17 02:37:35,550 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 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:37:35,617 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-09-17 02:37:35,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:37:35,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-17 02:37:35,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:35,630 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:35,630 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:35,630 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-17 02:37:35,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577504453] [2020-09-17 02:37:35,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-17 02:37:35,630 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:35,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-17 02:37:35,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2020-09-17 02:37:35,631 INFO L87 Difference]: Start difference. First operand 66 states and 162 transitions. Second operand 23 states. [2020-09-17 02:37:36,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:36,337 INFO L93 Difference]: Finished difference Result 102 states and 237 transitions. [2020-09-17 02:37:36,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-17 02:37:36,338 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-17 02:37:36,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:36,339 INFO L225 Difference]: With dead ends: 102 [2020-09-17 02:37:36,339 INFO L226 Difference]: Without dead ends: 96 [2020-09-17 02:37:36,339 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=553, Invalid=1169, Unknown=0, NotChecked=0, Total=1722 [2020-09-17 02:37:36,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-09-17 02:37:36,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 74. [2020-09-17 02:37:36,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-17 02:37:36,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 181 transitions. [2020-09-17 02:37:36,341 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 181 transitions. Word has length 27 [2020-09-17 02:37:36,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:36,341 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 181 transitions. [2020-09-17 02:37:36,341 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-17 02:37:36,341 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 181 transitions. [2020-09-17 02:37:36,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-17 02:37:36,342 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:36,342 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:36,542 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable198 [2020-09-17 02:37:36,542 INFO L427 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:36,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:36,543 INFO L82 PathProgramCache]: Analyzing trace with hash 2099543923, now seen corresponding path program 198 times [2020-09-17 02:37:36,543 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:36,543 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106920801] [2020-09-17 02:37:36,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:36,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:37,030 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:37,030 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106920801] [2020-09-17 02:37:37,030 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711296653] [2020-09-17 02:37:37,030 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 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:37:37,097 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-09-17 02:37:37,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:37:37,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-17 02:37:37,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:37,127 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:37:37,140 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:37,140 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:37,140 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-17 02:37:37,141 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479994314] [2020-09-17 02:37:37,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-17 02:37:37,141 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:37,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-17 02:37:37,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:37:37,141 INFO L87 Difference]: Start difference. First operand 74 states and 181 transitions. Second operand 24 states. [2020-09-17 02:37:37,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:37,947 INFO L93 Difference]: Finished difference Result 122 states and 277 transitions. [2020-09-17 02:37:37,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-17 02:37:37,948 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-17 02:37:37,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:37,949 INFO L225 Difference]: With dead ends: 122 [2020-09-17 02:37:37,949 INFO L226 Difference]: Without dead ends: 116 [2020-09-17 02:37:37,949 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=562, Invalid=1330, Unknown=0, NotChecked=0, Total=1892 [2020-09-17 02:37:37,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-09-17 02:37:37,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 72. [2020-09-17 02:37:37,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-17 02:37:37,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 177 transitions. [2020-09-17 02:37:37,952 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 177 transitions. Word has length 27 [2020-09-17 02:37:37,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:37,952 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 177 transitions. [2020-09-17 02:37:37,952 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-17 02:37:37,952 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 177 transitions. [2020-09-17 02:37:37,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-17 02:37:37,952 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:37,952 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:38,153 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2020-09-17 02:37:38,153 INFO L427 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:38,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:38,154 INFO L82 PathProgramCache]: Analyzing trace with hash 915619313, now seen corresponding path program 199 times [2020-09-17 02:37:38,154 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:38,154 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093190267] [2020-09-17 02:37:38,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:38,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:38,630 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:38,630 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093190267] [2020-09-17 02:37:38,631 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681640112] [2020-09-17 02:37:38,631 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 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:37:38,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:38,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-17 02:37:38,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:38,714 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:38,714 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:38,714 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-17 02:37:38,714 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548678650] [2020-09-17 02:37:38,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-17 02:37:38,715 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:38,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-17 02:37:38,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2020-09-17 02:37:38,715 INFO L87 Difference]: Start difference. First operand 72 states and 177 transitions. Second operand 23 states. [2020-09-17 02:37:39,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:39,587 INFO L93 Difference]: Finished difference Result 123 states and 281 transitions. [2020-09-17 02:37:39,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-17 02:37:39,588 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-17 02:37:39,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:39,588 INFO L225 Difference]: With dead ends: 123 [2020-09-17 02:37:39,588 INFO L226 Difference]: Without dead ends: 117 [2020-09-17 02:37:39,589 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=565, Invalid=1415, Unknown=0, NotChecked=0, Total=1980 [2020-09-17 02:37:39,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-17 02:37:39,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 75. [2020-09-17 02:37:39,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-17 02:37:39,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 185 transitions. [2020-09-17 02:37:39,591 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 185 transitions. Word has length 27 [2020-09-17 02:37:39,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:39,591 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 185 transitions. [2020-09-17 02:37:39,591 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-17 02:37:39,591 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 185 transitions. [2020-09-17 02:37:39,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-17 02:37:39,592 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:39,592 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:39,792 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2020-09-17 02:37:39,793 INFO L427 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:39,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:39,793 INFO L82 PathProgramCache]: Analyzing trace with hash -632539307, now seen corresponding path program 200 times [2020-09-17 02:37:39,793 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:39,794 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711538700] [2020-09-17 02:37:39,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:39,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:40,273 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:40,273 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711538700] [2020-09-17 02:37:40,273 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445683156] [2020-09-17 02:37:40,274 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 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:37:40,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:37:40,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:37:40,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-17 02:37:40,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:40,378 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:37:40,393 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:40,394 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:40,394 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-17 02:37:40,394 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102128713] [2020-09-17 02:37:40,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-17 02:37:40,394 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:40,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-17 02:37:40,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:37:40,395 INFO L87 Difference]: Start difference. First operand 75 states and 185 transitions. Second operand 24 states. [2020-09-17 02:37:41,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:41,282 INFO L93 Difference]: Finished difference Result 139 states and 313 transitions. [2020-09-17 02:37:41,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-17 02:37:41,283 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-17 02:37:41,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:41,284 INFO L225 Difference]: With dead ends: 139 [2020-09-17 02:37:41,284 INFO L226 Difference]: Without dead ends: 133 [2020-09-17 02:37:41,284 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=601, Invalid=1561, Unknown=0, NotChecked=0, Total=2162 [2020-09-17 02:37:41,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-09-17 02:37:41,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 74. [2020-09-17 02:37:41,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-17 02:37:41,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 183 transitions. [2020-09-17 02:37:41,288 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 183 transitions. Word has length 27 [2020-09-17 02:37:41,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:41,288 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 183 transitions. [2020-09-17 02:37:41,288 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-17 02:37:41,288 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 183 transitions. [2020-09-17 02:37:41,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-17 02:37:41,289 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:41,289 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:41,497 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2020-09-17 02:37:41,497 INFO L427 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:41,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:41,498 INFO L82 PathProgramCache]: Analyzing trace with hash -1934328493, now seen corresponding path program 201 times [2020-09-17 02:37:41,498 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:41,498 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121175237] [2020-09-17 02:37:41,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:41,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:41,956 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:41,956 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121175237] [2020-09-17 02:37:41,957 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686172551] [2020-09-17 02:37:41,957 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 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:37:42,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-09-17 02:37:42,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:37:42,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-17 02:37:42,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:42,045 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:42,051 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:42,052 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-17 02:37:42,052 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179175888] [2020-09-17 02:37:42,052 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-17 02:37:42,052 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:42,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-17 02:37:42,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2020-09-17 02:37:42,052 INFO L87 Difference]: Start difference. First operand 74 states and 183 transitions. Second operand 23 states. [2020-09-17 02:37:43,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:43,041 INFO L93 Difference]: Finished difference Result 139 states and 315 transitions. [2020-09-17 02:37:43,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-17 02:37:43,042 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-17 02:37:43,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:43,043 INFO L225 Difference]: With dead ends: 139 [2020-09-17 02:37:43,043 INFO L226 Difference]: Without dead ends: 133 [2020-09-17 02:37:43,044 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=618, Invalid=1638, Unknown=0, NotChecked=0, Total=2256 [2020-09-17 02:37:43,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-09-17 02:37:43,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 77. [2020-09-17 02:37:43,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-09-17 02:37:43,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 191 transitions. [2020-09-17 02:37:43,046 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 191 transitions. Word has length 27 [2020-09-17 02:37:43,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:43,046 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 191 transitions. [2020-09-17 02:37:43,046 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-17 02:37:43,046 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 191 transitions. [2020-09-17 02:37:43,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-17 02:37:43,046 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:43,047 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:43,247 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable202,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:37:43,247 INFO L427 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:43,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:43,248 INFO L82 PathProgramCache]: Analyzing trace with hash 1550090167, now seen corresponding path program 202 times [2020-09-17 02:37:43,248 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:43,248 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320972608] [2020-09-17 02:37:43,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:43,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:43,705 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:43,706 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320972608] [2020-09-17 02:37:43,706 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372963516] [2020-09-17 02:37:43,706 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 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:37:43,776 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:37:43,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:37:43,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-17 02:37:43,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:43,810 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:37:43,828 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:43,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:43,829 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-17 02:37:43,829 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493252358] [2020-09-17 02:37:43,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-17 02:37:43,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:43,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-17 02:37:43,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:37:43,830 INFO L87 Difference]: Start difference. First operand 77 states and 191 transitions. Second operand 24 states. [2020-09-17 02:37:44,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:44,946 INFO L93 Difference]: Finished difference Result 136 states and 309 transitions. [2020-09-17 02:37:44,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-17 02:37:44,947 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-17 02:37:44,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:44,948 INFO L225 Difference]: With dead ends: 136 [2020-09-17 02:37:44,948 INFO L226 Difference]: Without dead ends: 130 [2020-09-17 02:37:44,948 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=622, Invalid=1730, Unknown=0, NotChecked=0, Total=2352 [2020-09-17 02:37:44,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-09-17 02:37:44,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 76. [2020-09-17 02:37:44,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-17 02:37:44,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 189 transitions. [2020-09-17 02:37:44,951 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 189 transitions. Word has length 27 [2020-09-17 02:37:44,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:44,951 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 189 transitions. [2020-09-17 02:37:44,951 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-17 02:37:44,951 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 189 transitions. [2020-09-17 02:37:44,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-17 02:37:44,952 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:44,952 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:45,152 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2020-09-17 02:37:45,152 INFO L427 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:45,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:45,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1602366773, now seen corresponding path program 203 times [2020-09-17 02:37:45,153 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:45,153 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913980928] [2020-09-17 02:37:45,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:45,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:45,588 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:45,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913980928] [2020-09-17 02:37:45,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916395685] [2020-09-17 02:37:45,589 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 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:37:45,657 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-09-17 02:37:45,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:37:45,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-17 02:37:45,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:45,677 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:45,677 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:45,677 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-17 02:37:45,677 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313004736] [2020-09-17 02:37:45,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-17 02:37:45,677 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:45,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-17 02:37:45,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2020-09-17 02:37:45,678 INFO L87 Difference]: Start difference. First operand 76 states and 189 transitions. Second operand 23 states. [2020-09-17 02:37:46,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:46,728 INFO L93 Difference]: Finished difference Result 137 states and 313 transitions. [2020-09-17 02:37:46,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-17 02:37:46,729 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-17 02:37:46,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:46,729 INFO L225 Difference]: With dead ends: 137 [2020-09-17 02:37:46,730 INFO L226 Difference]: Without dead ends: 131 [2020-09-17 02:37:46,730 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=654, Invalid=1796, Unknown=0, NotChecked=0, Total=2450 [2020-09-17 02:37:46,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-09-17 02:37:46,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 79. [2020-09-17 02:37:46,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-17 02:37:46,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 197 transitions. [2020-09-17 02:37:46,733 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 197 transitions. Word has length 27 [2020-09-17 02:37:46,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:46,733 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 197 transitions. [2020-09-17 02:37:46,733 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-17 02:37:46,733 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 197 transitions. [2020-09-17 02:37:46,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-17 02:37:46,733 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:46,733 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:46,934 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:37:46,934 INFO L427 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:46,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:46,935 INFO L82 PathProgramCache]: Analyzing trace with hash -816351079, now seen corresponding path program 204 times [2020-09-17 02:37:46,935 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:46,935 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909390638] [2020-09-17 02:37:46,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:46,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:47,377 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:47,378 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909390638] [2020-09-17 02:37:47,378 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785647697] [2020-09-17 02:37:47,378 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 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:37:47,452 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-09-17 02:37:47,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:37:47,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-17 02:37:47,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:47,495 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:37:47,514 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:47,514 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:47,514 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-17 02:37:47,514 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461627486] [2020-09-17 02:37:47,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-17 02:37:47,515 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:47,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-17 02:37:47,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:37:47,515 INFO L87 Difference]: Start difference. First operand 79 states and 197 transitions. Second operand 24 states. [2020-09-17 02:37:48,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:48,723 INFO L93 Difference]: Finished difference Result 134 states and 307 transitions. [2020-09-17 02:37:48,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-17 02:37:48,724 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-17 02:37:48,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:48,725 INFO L225 Difference]: With dead ends: 134 [2020-09-17 02:37:48,725 INFO L226 Difference]: Without dead ends: 128 [2020-09-17 02:37:48,725 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=659, Invalid=1891, Unknown=0, NotChecked=0, Total=2550 [2020-09-17 02:37:48,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-09-17 02:37:48,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 78. [2020-09-17 02:37:48,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-17 02:37:48,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 195 transitions. [2020-09-17 02:37:48,730 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 195 transitions. Word has length 27 [2020-09-17 02:37:48,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:48,730 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 195 transitions. [2020-09-17 02:37:48,730 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-17 02:37:48,730 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 195 transitions. [2020-09-17 02:37:48,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-17 02:37:48,730 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:48,730 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:48,932 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2020-09-17 02:37:48,932 INFO L427 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:48,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:48,933 INFO L82 PathProgramCache]: Analyzing trace with hash -128029289, now seen corresponding path program 205 times [2020-09-17 02:37:48,933 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:48,933 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110421915] [2020-09-17 02:37:48,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:48,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:49,348 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:49,348 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110421915] [2020-09-17 02:37:49,349 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779260082] [2020-09-17 02:37:49,349 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 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:37:49,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:49,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-17 02:37:49,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:49,433 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:49,433 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:49,433 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-17 02:37:49,434 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051495934] [2020-09-17 02:37:49,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-17 02:37:49,434 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:49,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-17 02:37:49,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-09-17 02:37:49,434 INFO L87 Difference]: Start difference. First operand 78 states and 195 transitions. Second operand 23 states. [2020-09-17 02:37:50,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:50,633 INFO L93 Difference]: Finished difference Result 135 states and 311 transitions. [2020-09-17 02:37:50,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-17 02:37:50,634 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-17 02:37:50,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:50,634 INFO L225 Difference]: With dead ends: 135 [2020-09-17 02:37:50,635 INFO L226 Difference]: Without dead ends: 129 [2020-09-17 02:37:50,635 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=706, Invalid=1946, Unknown=0, NotChecked=0, Total=2652 [2020-09-17 02:37:50,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-09-17 02:37:50,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 81. [2020-09-17 02:37:50,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-17 02:37:50,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 203 transitions. [2020-09-17 02:37:50,637 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 203 transitions. Word has length 27 [2020-09-17 02:37:50,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:50,637 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 203 transitions. [2020-09-17 02:37:50,637 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-17 02:37:50,637 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 203 transitions. [2020-09-17 02:37:50,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-17 02:37:50,638 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:50,638 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:50,838 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:37:50,839 INFO L427 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:50,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:50,839 INFO L82 PathProgramCache]: Analyzing trace with hash 857162235, now seen corresponding path program 206 times [2020-09-17 02:37:50,840 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:50,840 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937339413] [2020-09-17 02:37:50,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:50,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:51,275 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:51,275 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937339413] [2020-09-17 02:37:51,276 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366399781] [2020-09-17 02:37:51,276 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 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:37:51,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:37:51,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:37:51,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-17 02:37:51,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:51,374 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:37:51,392 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:51,392 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:51,392 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-17 02:37:51,392 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449603748] [2020-09-17 02:37:51,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-17 02:37:51,393 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:51,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-17 02:37:51,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:37:51,393 INFO L87 Difference]: Start difference. First operand 81 states and 203 transitions. Second operand 24 states. [2020-09-17 02:37:52,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:52,727 INFO L93 Difference]: Finished difference Result 132 states and 305 transitions. [2020-09-17 02:37:52,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-17 02:37:52,728 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-17 02:37:52,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:52,728 INFO L225 Difference]: With dead ends: 132 [2020-09-17 02:37:52,728 INFO L226 Difference]: Without dead ends: 126 [2020-09-17 02:37:52,729 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=712, Invalid=2044, Unknown=0, NotChecked=0, Total=2756 [2020-09-17 02:37:52,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-09-17 02:37:52,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 80. [2020-09-17 02:37:52,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-17 02:37:52,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 201 transitions. [2020-09-17 02:37:52,731 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 201 transitions. Word has length 27 [2020-09-17 02:37:52,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:52,732 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 201 transitions. [2020-09-17 02:37:52,732 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-17 02:37:52,732 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 201 transitions. [2020-09-17 02:37:52,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-17 02:37:52,732 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:52,732 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:52,933 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:37:52,933 INFO L427 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:52,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:52,934 INFO L82 PathProgramCache]: Analyzing trace with hash -759996807, now seen corresponding path program 207 times [2020-09-17 02:37:52,934 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:52,934 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386458704] [2020-09-17 02:37:52,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:52,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:53,339 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:53,339 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386458704] [2020-09-17 02:37:53,339 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160124839] [2020-09-17 02:37:53,339 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 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:37:53,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-09-17 02:37:53,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:37:53,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-17 02:37:53,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:53,436 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:53,436 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:53,436 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-17 02:37:53,437 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812919621] [2020-09-17 02:37:53,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-17 02:37:53,437 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:53,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-17 02:37:53,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2020-09-17 02:37:53,437 INFO L87 Difference]: Start difference. First operand 80 states and 201 transitions. Second operand 23 states. [2020-09-17 02:37:54,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:54,662 INFO L93 Difference]: Finished difference Result 133 states and 309 transitions. [2020-09-17 02:37:54,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-17 02:37:54,664 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-17 02:37:54,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:54,664 INFO L225 Difference]: With dead ends: 133 [2020-09-17 02:37:54,664 INFO L226 Difference]: Without dead ends: 127 [2020-09-17 02:37:54,665 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=774, Invalid=2088, Unknown=0, NotChecked=0, Total=2862 [2020-09-17 02:37:54,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-09-17 02:37:54,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 83. [2020-09-17 02:37:54,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-09-17 02:37:54,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 209 transitions. [2020-09-17 02:37:54,666 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 209 transitions. Word has length 27 [2020-09-17 02:37:54,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:54,666 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 209 transitions. [2020-09-17 02:37:54,667 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-17 02:37:54,667 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 209 transitions. [2020-09-17 02:37:54,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-17 02:37:54,667 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:54,667 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:54,867 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:37:54,868 INFO L427 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:54,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:54,868 INFO L82 PathProgramCache]: Analyzing trace with hash 496892893, now seen corresponding path program 208 times [2020-09-17 02:37:54,869 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:54,869 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985670060] [2020-09-17 02:37:54,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:54,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:55,282 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:55,282 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985670060] [2020-09-17 02:37:55,282 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971970230] [2020-09-17 02:37:55,282 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 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:37:55,348 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:37:55,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:37:55,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-17 02:37:55,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:55,399 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:37:55,425 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:55,425 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:55,426 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-17 02:37:55,426 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506617469] [2020-09-17 02:37:55,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-17 02:37:55,426 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:55,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-17 02:37:55,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:37:55,426 INFO L87 Difference]: Start difference. First operand 83 states and 209 transitions. Second operand 24 states. [2020-09-17 02:37:56,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:56,885 INFO L93 Difference]: Finished difference Result 130 states and 303 transitions. [2020-09-17 02:37:56,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-17 02:37:56,886 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-17 02:37:56,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:56,886 INFO L225 Difference]: With dead ends: 130 [2020-09-17 02:37:56,887 INFO L226 Difference]: Without dead ends: 124 [2020-09-17 02:37:56,887 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=781, Invalid=2189, Unknown=0, NotChecked=0, Total=2970 [2020-09-17 02:37:56,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-09-17 02:37:56,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 82. [2020-09-17 02:37:56,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-17 02:37:56,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 207 transitions. [2020-09-17 02:37:56,890 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 207 transitions. Word has length 27 [2020-09-17 02:37:56,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:56,890 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 207 transitions. [2020-09-17 02:37:56,890 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-17 02:37:56,890 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 207 transitions. [2020-09-17 02:37:56,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-17 02:37:56,891 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:56,891 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:57,099 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:37:57,099 INFO L427 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:57,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:57,100 INFO L82 PathProgramCache]: Analyzing trace with hash 2113085403, now seen corresponding path program 209 times [2020-09-17 02:37:57,100 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:57,100 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768855357] [2020-09-17 02:37:57,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:57,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:57,487 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:57,488 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768855357] [2020-09-17 02:37:57,488 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482355403] [2020-09-17 02:37:57,488 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 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:37:57,562 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-09-17 02:37:57,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:37:57,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-17 02:37:57,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:57,590 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:57,591 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:57,591 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-17 02:37:57,591 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072471240] [2020-09-17 02:37:57,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-17 02:37:57,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:57,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-17 02:37:57,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2020-09-17 02:37:57,592 INFO L87 Difference]: Start difference. First operand 82 states and 207 transitions. Second operand 23 states. [2020-09-17 02:37:58,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:58,888 INFO L93 Difference]: Finished difference Result 131 states and 307 transitions. [2020-09-17 02:37:58,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-17 02:37:58,890 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-17 02:37:58,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:58,890 INFO L225 Difference]: With dead ends: 131 [2020-09-17 02:37:58,890 INFO L226 Difference]: Without dead ends: 125 [2020-09-17 02:37:58,891 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=858, Invalid=2222, Unknown=0, NotChecked=0, Total=3080 [2020-09-17 02:37:58,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-09-17 02:37:58,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 85. [2020-09-17 02:37:58,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-09-17 02:37:58,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 215 transitions. [2020-09-17 02:37:58,893 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 215 transitions. Word has length 27 [2020-09-17 02:37:58,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:58,894 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 215 transitions. [2020-09-17 02:37:58,894 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-17 02:37:58,894 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 215 transitions. [2020-09-17 02:37:58,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-17 02:37:58,894 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:58,894 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:59,094 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2020-09-17 02:37:59,095 INFO L427 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:59,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:59,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1662138817, now seen corresponding path program 210 times [2020-09-17 02:37:59,096 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:59,096 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665839992] [2020-09-17 02:37:59,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:59,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:59,490 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:59,491 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665839992] [2020-09-17 02:37:59,491 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851861515] [2020-09-17 02:37:59,491 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 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:37:59,564 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-09-17 02:37:59,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:37:59,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-17 02:37:59,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:59,603 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:37:59,625 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:59,625 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:59,625 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-17 02:37:59,626 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394061571] [2020-09-17 02:37:59,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-17 02:37:59,626 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:59,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-17 02:37:59,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:37:59,627 INFO L87 Difference]: Start difference. First operand 85 states and 215 transitions. Second operand 24 states. [2020-09-17 02:38:01,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:38:01,213 INFO L93 Difference]: Finished difference Result 128 states and 301 transitions. [2020-09-17 02:38:01,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-17 02:38:01,214 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-17 02:38:01,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:38:01,215 INFO L225 Difference]: With dead ends: 128 [2020-09-17 02:38:01,215 INFO L226 Difference]: Without dead ends: 122 [2020-09-17 02:38:01,215 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 799 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=866, Invalid=2326, Unknown=0, NotChecked=0, Total=3192 [2020-09-17 02:38:01,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-09-17 02:38:01,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 84. [2020-09-17 02:38:01,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-09-17 02:38:01,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 213 transitions. [2020-09-17 02:38:01,217 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 213 transitions. Word has length 27 [2020-09-17 02:38:01,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:38:01,218 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 213 transitions. [2020-09-17 02:38:01,218 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-17 02:38:01,218 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 213 transitions. [2020-09-17 02:38:01,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-17 02:38:01,218 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:38:01,218 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:38:01,419 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2020-09-17 02:38:01,419 INFO L427 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:38:01,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:38:01,419 INFO L82 PathProgramCache]: Analyzing trace with hash -6827587, now seen corresponding path program 211 times [2020-09-17 02:38:01,420 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:38:01,420 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539587596] [2020-09-17 02:38:01,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:38:01,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:38:01,823 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:01,824 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539587596] [2020-09-17 02:38:01,824 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374307281] [2020-09-17 02:38:01,824 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 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:38:01,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:38:01,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-17 02:38:01,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:38:01,916 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:01,916 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:38:01,917 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-17 02:38:01,917 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395599516] [2020-09-17 02:38:01,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-17 02:38:01,917 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:38:01,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-17 02:38:01,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2020-09-17 02:38:01,917 INFO L87 Difference]: Start difference. First operand 84 states and 213 transitions. Second operand 23 states. [2020-09-17 02:38:03,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:38:03,327 INFO L93 Difference]: Finished difference Result 129 states and 305 transitions. [2020-09-17 02:38:03,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-17 02:38:03,329 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-17 02:38:03,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:38:03,329 INFO L225 Difference]: With dead ends: 129 [2020-09-17 02:38:03,329 INFO L226 Difference]: Without dead ends: 123 [2020-09-17 02:38:03,330 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=958, Invalid=2348, Unknown=0, NotChecked=0, Total=3306 [2020-09-17 02:38:03,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-09-17 02:38:03,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 87. [2020-09-17 02:38:03,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-17 02:38:03,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-17 02:38:03,331 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 27 [2020-09-17 02:38:03,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:38:03,332 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-17 02:38:03,332 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-17 02:38:03,332 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-17 02:38:03,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-17 02:38:03,332 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:38:03,332 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:38:03,532 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2020-09-17 02:38:03,533 INFO L427 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:38:03,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:38:03,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1726955231, now seen corresponding path program 212 times [2020-09-17 02:38:03,534 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:38:03,534 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828442499] [2020-09-17 02:38:03,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:38:03,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:38:03,937 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:03,938 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828442499] [2020-09-17 02:38:03,938 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322440623] [2020-09-17 02:38:03,938 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 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:38:03,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:38:03,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:38:04,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-17 02:38:04,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:38:04,036 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:38:04,061 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:04,061 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:38:04,062 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-17 02:38:04,062 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128918692] [2020-09-17 02:38:04,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-17 02:38:04,062 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:38:04,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-17 02:38:04,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:38:04,062 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 24 states. [2020-09-17 02:38:05,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:38:05,838 INFO L93 Difference]: Finished difference Result 126 states and 299 transitions. [2020-09-17 02:38:05,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-17 02:38:05,840 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-17 02:38:05,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:38:05,840 INFO L225 Difference]: With dead ends: 126 [2020-09-17 02:38:05,840 INFO L226 Difference]: Without dead ends: 120 [2020-09-17 02:38:05,841 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 888 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=967, Invalid=2455, Unknown=0, NotChecked=0, Total=3422 [2020-09-17 02:38:05,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-09-17 02:38:05,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 86. [2020-09-17 02:38:05,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-17 02:38:05,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-17 02:38:05,843 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 27 [2020-09-17 02:38:05,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:38:05,843 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-17 02:38:05,843 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-17 02:38:05,843 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-17 02:38:05,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-17 02:38:05,844 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:38:05,844 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:38:06,044 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2020-09-17 02:38:06,045 INFO L427 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:38:06,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:38:06,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1255959521, now seen corresponding path program 213 times [2020-09-17 02:38:06,045 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:38:06,046 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687521132] [2020-09-17 02:38:06,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:38:06,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:38:06,436 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:06,437 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687521132] [2020-09-17 02:38:06,437 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191356612] [2020-09-17 02:38:06,437 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 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:38:06,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-09-17 02:38:06,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:38:06,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-17 02:38:06,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:38:06,546 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:06,547 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:38:06,547 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-17 02:38:06,547 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328028385] [2020-09-17 02:38:06,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-17 02:38:06,547 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:38:06,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-17 02:38:06,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2020-09-17 02:38:06,548 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 23 states. [2020-09-17 02:38:08,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:38:08,068 INFO L93 Difference]: Finished difference Result 127 states and 303 transitions. [2020-09-17 02:38:08,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-09-17 02:38:08,068 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-17 02:38:08,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:38:08,069 INFO L225 Difference]: With dead ends: 127 [2020-09-17 02:38:08,069 INFO L226 Difference]: Without dead ends: 121 [2020-09-17 02:38:08,069 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 980 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1074, Invalid=2466, Unknown=0, NotChecked=0, Total=3540 [2020-09-17 02:38:08,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-09-17 02:38:08,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 89. [2020-09-17 02:38:08,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-09-17 02:38:08,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 227 transitions. [2020-09-17 02:38:08,072 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 227 transitions. Word has length 27 [2020-09-17 02:38:08,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:38:08,072 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 227 transitions. [2020-09-17 02:38:08,072 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-17 02:38:08,072 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 227 transitions. [2020-09-17 02:38:08,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-17 02:38:08,073 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:38:08,073 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:38:08,273 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:38:08,273 INFO L427 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:38:08,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:38:08,274 INFO L82 PathProgramCache]: Analyzing trace with hash -1239872381, now seen corresponding path program 214 times [2020-09-17 02:38:08,274 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:38:08,274 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930637850] [2020-09-17 02:38:08,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:38:08,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:38:08,665 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:08,665 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930637850] [2020-09-17 02:38:08,666 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310949384] [2020-09-17 02:38:08,666 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 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:38:08,731 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:38:08,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:38:08,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-17 02:38:08,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:38:08,769 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:38:08,794 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:08,794 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:38:08,794 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-17 02:38:08,794 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537843067] [2020-09-17 02:38:08,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-17 02:38:08,795 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:38:08,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-17 02:38:08,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:38:08,795 INFO L87 Difference]: Start difference. First operand 89 states and 227 transitions. Second operand 24 states. [2020-09-17 02:38:10,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:38:10,658 INFO L93 Difference]: Finished difference Result 124 states and 297 transitions. [2020-09-17 02:38:10,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-17 02:38:10,659 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-17 02:38:10,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:38:10,659 INFO L225 Difference]: With dead ends: 124 [2020-09-17 02:38:10,660 INFO L226 Difference]: Without dead ends: 118 [2020-09-17 02:38:10,660 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 981 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1084, Invalid=2576, Unknown=0, NotChecked=0, Total=3660 [2020-09-17 02:38:10,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-09-17 02:38:10,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 88. [2020-09-17 02:38:10,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-09-17 02:38:10,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 225 transitions. [2020-09-17 02:38:10,662 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 225 transitions. Word has length 27 [2020-09-17 02:38:10,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:38:10,662 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 225 transitions. [2020-09-17 02:38:10,662 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-17 02:38:10,662 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 225 transitions. [2020-09-17 02:38:10,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-17 02:38:10,663 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:38:10,663 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:38:10,869 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2020-09-17 02:38:10,869 INFO L427 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:38:10,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:38:10,870 INFO L82 PathProgramCache]: Analyzing trace with hash -1239382271, now seen corresponding path program 215 times [2020-09-17 02:38:10,870 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:38:10,870 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897390527] [2020-09-17 02:38:10,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:38:10,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:38:11,265 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:11,265 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897390527] [2020-09-17 02:38:11,265 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036986867] [2020-09-17 02:38:11,266 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 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:38:11,335 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-09-17 02:38:11,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:38:11,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-17 02:38:11,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:38:11,374 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:11,374 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:38:11,375 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-17 02:38:11,375 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323189644] [2020-09-17 02:38:11,375 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-17 02:38:11,375 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:38:11,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-17 02:38:11,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2020-09-17 02:38:11,375 INFO L87 Difference]: Start difference. First operand 88 states and 225 transitions. Second operand 23 states. [2020-09-17 02:38:12,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:38:12,921 INFO L93 Difference]: Finished difference Result 144 states and 347 transitions. [2020-09-17 02:38:12,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-09-17 02:38:12,922 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-17 02:38:12,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:38:12,923 INFO L225 Difference]: With dead ends: 144 [2020-09-17 02:38:12,923 INFO L226 Difference]: Without dead ends: 138 [2020-09-17 02:38:12,924 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1206, Invalid=2576, Unknown=0, NotChecked=0, Total=3782 [2020-09-17 02:38:12,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-09-17 02:38:12,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 94. [2020-09-17 02:38:12,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-09-17 02:38:12,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 245 transitions. [2020-09-17 02:38:12,926 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 245 transitions. Word has length 27 [2020-09-17 02:38:12,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:38:12,927 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 245 transitions. [2020-09-17 02:38:12,927 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-17 02:38:12,927 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 245 transitions. [2020-09-17 02:38:12,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-17 02:38:12,927 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:38:12,927 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:38:13,131 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:38:13,131 INFO L427 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:38:13,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:38:13,132 INFO L82 PathProgramCache]: Analyzing trace with hash -1239365531, now seen corresponding path program 216 times [2020-09-17 02:38:13,132 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:38:13,132 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709882776] [2020-09-17 02:38:13,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:38:13,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:38:13,534 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:13,534 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709882776] [2020-09-17 02:38:13,534 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106081539] [2020-09-17 02:38:13,534 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 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:38:13,603 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-09-17 02:38:13,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:38:13,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-17 02:38:13,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:38:13,641 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:38:13,665 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:13,666 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:38:13,666 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-17 02:38:13,666 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723021542] [2020-09-17 02:38:13,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-17 02:38:13,667 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:38:13,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-17 02:38:13,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:38:13,667 INFO L87 Difference]: Start difference. First operand 94 states and 245 transitions. Second operand 24 states. [2020-09-17 02:38:15,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:38:15,567 INFO L93 Difference]: Finished difference Result 125 states and 303 transitions. [2020-09-17 02:38:15,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-17 02:38:15,568 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-17 02:38:15,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:38:15,569 INFO L225 Difference]: With dead ends: 125 [2020-09-17 02:38:15,569 INFO L226 Difference]: Without dead ends: 117 [2020-09-17 02:38:15,570 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1079 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1217, Invalid=2689, Unknown=0, NotChecked=0, Total=3906 [2020-09-17 02:38:15,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-17 02:38:15,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 91. [2020-09-17 02:38:15,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-09-17 02:38:15,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 233 transitions. [2020-09-17 02:38:15,572 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 233 transitions. Word has length 27 [2020-09-17 02:38:15,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:38:15,572 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 233 transitions. [2020-09-17 02:38:15,572 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-17 02:38:15,572 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 233 transitions. [2020-09-17 02:38:15,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-17 02:38:15,573 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:38:15,573 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:38:15,773 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2020-09-17 02:38:15,774 INFO L427 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:38:15,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:38:15,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1945349894, now seen corresponding path program 217 times [2020-09-17 02:38:15,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:38:15,775 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033498470] [2020-09-17 02:38:15,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:38:15,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-17 02:38:15,789 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-17 02:38:15,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-17 02:38:15,808 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-17 02:38:15,840 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-09-17 02:38:15,840 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-17 02:38:15,840 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218 [2020-09-17 02:38:15,918 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.09 02:38:15 BasicIcfg [2020-09-17 02:38:15,918 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-17 02:38:15,921 INFO L168 Benchmark]: Toolchain (without parser) took 298449.12 ms. Allocated memory was 138.4 MB in the beginning and 201.3 MB in the end (delta: 62.9 MB). Free memory was 100.2 MB in the beginning and 76.5 MB in the end (delta: 23.7 MB). Peak memory consumption was 86.6 MB. Max. memory is 7.1 GB. [2020-09-17 02:38:15,921 INFO L168 Benchmark]: CDTParser took 0.64 ms. Allocated memory is still 138.4 MB. Free memory was 120.0 MB in the beginning and 119.5 MB in the end (delta: 419.4 kB). Peak memory consumption was 419.4 kB. Max. memory is 7.1 GB. [2020-09-17 02:38:15,922 INFO L168 Benchmark]: CACSL2BoogieTranslator took 897.21 ms. Allocated memory was 138.4 MB in the beginning and 202.9 MB in the end (delta: 64.5 MB). Free memory was 99.3 MB in the beginning and 162.5 MB in the end (delta: -63.1 MB). Peak memory consumption was 25.9 MB. Max. memory is 7.1 GB. [2020-09-17 02:38:15,922 INFO L168 Benchmark]: Boogie Procedure Inliner took 116.61 ms. Allocated memory is still 202.9 MB. Free memory was 162.5 MB in the beginning and 160.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-09-17 02:38:15,923 INFO L168 Benchmark]: Boogie Preprocessor took 69.81 ms. Allocated memory is still 202.9 MB. Free memory was 160.5 MB in the beginning and 158.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-09-17 02:38:15,923 INFO L168 Benchmark]: RCFGBuilder took 514.84 ms. Allocated memory is still 202.9 MB. Free memory was 158.5 MB in the beginning and 138.4 MB in the end (delta: 20.1 MB). Peak memory consumption was 20.1 MB. Max. memory is 7.1 GB. [2020-09-17 02:38:15,923 INFO L168 Benchmark]: TraceAbstraction took 296837.67 ms. Allocated memory was 202.9 MB in the beginning and 201.3 MB in the end (delta: -1.6 MB). Free memory was 138.4 MB in the beginning and 76.5 MB in the end (delta: 62.0 MB). Peak memory consumption was 60.4 MB. Max. memory is 7.1 GB. [2020-09-17 02:38:15,926 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.64 ms. Allocated memory is still 138.4 MB. Free memory was 120.0 MB in the beginning and 119.5 MB in the end (delta: 419.4 kB). Peak memory consumption was 419.4 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 897.21 ms. Allocated memory was 138.4 MB in the beginning and 202.9 MB in the end (delta: 64.5 MB). Free memory was 99.3 MB in the beginning and 162.5 MB in the end (delta: -63.1 MB). Peak memory consumption was 25.9 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 116.61 ms. Allocated memory is still 202.9 MB. Free memory was 162.5 MB in the beginning and 160.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 69.81 ms. Allocated memory is still 202.9 MB. Free memory was 160.5 MB in the beginning and 158.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 514.84 ms. Allocated memory is still 202.9 MB. Free memory was 158.5 MB in the beginning and 138.4 MB in the end (delta: 20.1 MB). Peak memory consumption was 20.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 296837.67 ms. Allocated memory was 202.9 MB in the beginning and 201.3 MB in the end (delta: -1.6 MB). Free memory was 138.4 MB in the beginning and 76.5 MB in the end (delta: 62.0 MB). Peak memory consumption was 60.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 1.6s, 57 ProgramPointsBefore, 20 ProgramPointsAfterwards, 55 TransitionsBefore, 15 TransitionsAfterwards, 924 CoEnabledTransitionPairs, 6 FixpointIterations, 12 TrivialSequentialCompositions, 25 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 5 ConcurrentYvCompositions, 3 ChoiceCompositions, 486 VarBasedMoverChecksPositive, 13 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 851 CheckedPairsTotal, 42 TotalNumberOfCompositions - CounterExampleResult [Line: 703]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L675] 0 int i = 3, j = 6; [L693] 0 pthread_t id1, id2; [L694] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arg={0:0}, i=3, j=6] [L677] 1 int k = 0; VAL [arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, i=7, j=6, k=1] [L695] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=1] [L685] 2 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=1, k=0] [L697] 0 int condI = i >= (2*10 +6); VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0, k=1] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=1] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=2, k=1] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=2] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=3, k=2] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=3] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=4, k=3] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=4] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=4, k=5] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=5] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=16, k=5, k=6] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=6, k=6] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=18, k=6, k=7] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=7, k=7] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=20, k=7, k=8] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=8, k=8] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=22, k=9, k=8] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=24, k=9, k=9] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=24, k=9, k=10] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=10, k=10] [L700] 0 int condJ = j >= (2*10 +6); [L702] COND TRUE 0 condI || condJ [L703] 0 __VERIFIER_error() VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=10, k=10] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 296.5s, OverallIterations: 219, TraceHistogramMax: 10, AutomataDifference: 170.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.7s, HoareTripleCheckerStatistics: 3496 SDtfs, 12096 SDslu, 22388 SDs, 0 SdLazy, 24086 SolverSat, 13803 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 32.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11876 GetRequests, 3914 SyntacticMatches, 213 SemanticMatches, 7749 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75944 ImplicationChecksByTransitivity, 173.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=94occurred in iteration=217, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.7s AutomataMinimizationTime, 218 MinimizatonAttempts, 5505 StatesRemovedByMinimization, 217 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 2.1s SsaConstructionTime, 6.9s SatisfiabilityAnalysisTime, 61.4s InterpolantComputationTime, 8982 NumberOfCodeBlocks, 8982 NumberOfCodeBlocksAsserted, 1118 NumberOfCheckSat, 8523 ConstructedInterpolants, 0 QuantifiedInterpolants, 805507 SizeOfPredicates, 2751 NumberOfNonLiveVariables, 27387 ConjunctsInSsa, 3605 ConjunctsInUnsatCore, 431 InterpolantComputations, 5 PerfectInterpolantSequences, 0/17250 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...