/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-nondet/nondet-loop-bound-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-60655ea [2020-09-15 13:16:32,696 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-15 13:16:32,701 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-15 13:16:32,730 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-15 13:16:32,730 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-15 13:16:32,732 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-15 13:16:32,734 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-15 13:16:32,736 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-15 13:16:32,738 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-15 13:16:32,739 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-15 13:16:32,741 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-15 13:16:32,742 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-15 13:16:32,743 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-15 13:16:32,744 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-15 13:16:32,745 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-15 13:16:32,747 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-15 13:16:32,748 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-15 13:16:32,749 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-15 13:16:32,755 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-15 13:16:32,757 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-15 13:16:32,762 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-15 13:16:32,764 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-15 13:16:32,765 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-15 13:16:32,769 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-15 13:16:32,775 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-15 13:16:32,782 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-15 13:16:32,783 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-15 13:16:32,785 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-15 13:16:32,786 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-15 13:16:32,788 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-15 13:16:32,788 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-15 13:16:32,789 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-15 13:16:32,789 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-15 13:16:32,789 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-15 13:16:32,801 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-15 13:16:32,802 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-15 13:16:32,803 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA.epf [2020-09-15 13:16:32,860 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-15 13:16:32,861 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-15 13:16:32,864 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-15 13:16:32,864 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-15 13:16:32,864 INFO L138 SettingsManager]: * Use SBE=true [2020-09-15 13:16:32,865 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-15 13:16:32,865 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-15 13:16:32,865 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-15 13:16:32,865 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-15 13:16:32,865 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-15 13:16:32,867 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-15 13:16:32,867 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-15 13:16:32,867 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-15 13:16:32,868 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-15 13:16:32,868 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-15 13:16:32,868 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-15 13:16:32,868 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-15 13:16:32,869 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-15 13:16:32,869 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-15 13:16:32,869 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-15 13:16:32,870 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-15 13:16:32,870 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-15 13:16:32,870 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-15 13:16:32,870 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2020-09-15 13:16:32,870 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-15 13:16:32,871 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-15 13:16:32,871 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-15 13:16:32,871 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-09-15 13:16:32,871 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-15 13:16:33,379 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-15 13:16:33,400 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-15 13:16:33,405 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-15 13:16:33,407 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-15 13:16:33,407 INFO L275 PluginConnector]: CDTParser initialized [2020-09-15 13:16:33,409 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-nondet/nondet-loop-bound-1.i [2020-09-15 13:16:33,515 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4306d6dde/b5e8d7c9df93489b94f3fcc95ef140b7/FLAGc8d717c70 [2020-09-15 13:16:34,198 INFO L306 CDTParser]: Found 1 translation units. [2020-09-15 13:16:34,199 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/pthread-nondet/nondet-loop-bound-1.i [2020-09-15 13:16:34,217 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4306d6dde/b5e8d7c9df93489b94f3fcc95ef140b7/FLAGc8d717c70 [2020-09-15 13:16:34,479 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4306d6dde/b5e8d7c9df93489b94f3fcc95ef140b7 [2020-09-15 13:16:34,494 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-15 13:16:34,499 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-09-15 13:16:34,501 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-15 13:16:34,502 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-15 13:16:34,506 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-15 13:16:34,508 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.09 01:16:34" (1/1) ... [2020-09-15 13:16:34,514 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5061c896 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:16:34, skipping insertion in model container [2020-09-15 13:16:34,514 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.09 01:16:34" (1/1) ... [2020-09-15 13:16:34,523 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-15 13:16:34,589 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-15 13:16:35,171 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-15 13:16:35,193 INFO L203 MainTranslator]: Completed pre-run [2020-09-15 13:16:35,266 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-15 13:16:35,365 INFO L208 MainTranslator]: Completed translation [2020-09-15 13:16:35,367 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:16:35 WrapperNode [2020-09-15 13:16:35,368 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-15 13:16:35,369 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-09-15 13:16:35,369 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-09-15 13:16:35,369 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-09-15 13:16:35,382 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:16:35" (1/1) ... [2020-09-15 13:16:35,410 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:16:35" (1/1) ... [2020-09-15 13:16:35,438 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-09-15 13:16:35,438 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-15 13:16:35,439 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-15 13:16:35,439 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-15 13:16:35,449 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:16:35" (1/1) ... [2020-09-15 13:16:35,449 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:16:35" (1/1) ... [2020-09-15 13:16:35,452 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:16:35" (1/1) ... [2020-09-15 13:16:35,453 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:16:35" (1/1) ... [2020-09-15 13:16:35,459 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:16:35" (1/1) ... [2020-09-15 13:16:35,466 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:16:35" (1/1) ... [2020-09-15 13:16:35,468 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:16:35" (1/1) ... [2020-09-15 13:16:35,472 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-15 13:16:35,473 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-15 13:16:35,473 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-15 13:16:35,473 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-15 13:16:35,477 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:16:35" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:16:35,567 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2020-09-15 13:16:35,567 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2020-09-15 13:16:35,567 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2020-09-15 13:16:35,568 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2020-09-15 13:16:35,568 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-15 13:16:35,568 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-15 13:16:35,568 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-15 13:16:35,568 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-15 13:16:35,569 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-15 13:16:35,571 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-09-15 13:16:35,935 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-15 13:16:35,936 INFO L295 CfgBuilder]: Removed 9 assume(true) statements. [2020-09-15 13:16:35,943 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 01:16:35 BoogieIcfgContainer [2020-09-15 13:16:35,944 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-15 13:16:35,945 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-15 13:16:35,946 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-15 13:16:35,950 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-15 13:16:35,950 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.09 01:16:34" (1/3) ... [2020-09-15 13:16:35,951 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c0331ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.09 01:16:35, skipping insertion in model container [2020-09-15 13:16:35,952 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:16:35" (2/3) ... [2020-09-15 13:16:35,952 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c0331ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.09 01:16:35, skipping insertion in model container [2020-09-15 13:16:35,952 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 01:16:35" (3/3) ... [2020-09-15 13:16:35,955 INFO L109 eAbstractionObserver]: Analyzing ICFG nondet-loop-bound-1.i [2020-09-15 13:16:35,969 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-09-15 13:16:35,970 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-15 13:16:35,981 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-15 13:16:35,982 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-09-15 13:16:36,029 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:36,029 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:36,029 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:36,030 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:36,030 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:36,031 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:36,031 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:36,032 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:36,032 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:36,033 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:36,033 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:36,033 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:36,034 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:36,034 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:36,034 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:36,034 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:36,035 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:36,040 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:36,040 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:36,041 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:36,041 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:36,041 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:36,049 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:36,050 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:36,050 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:36,050 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:36,050 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:36,051 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:36,078 INFO L251 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-09-15 13:16:36,110 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-15 13:16:36,111 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-15 13:16:36,111 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-15 13:16:36,111 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-15 13:16:36,111 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-15 13:16:36,112 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-15 13:16:36,112 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-15 13:16:36,112 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-15 13:16:36,130 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 61 places, 58 transitions, 126 flow [2020-09-15 13:16:36,133 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 61 places, 58 transitions, 126 flow [2020-09-15 13:16:36,186 INFO L129 PetriNetUnfolder]: 4/68 cut-off events. [2020-09-15 13:16:36,186 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-09-15 13:16:36,194 INFO L80 FinitePrefix]: Finished finitePrefix Result has 76 conditions, 68 events. 4/68 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 84 event pairs, 0 based on Foata normal form. 0/61 useless extension candidates. Maximal degree in co-relation 48. Up to 4 conditions per place. [2020-09-15 13:16:36,197 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 61 places, 58 transitions, 126 flow [2020-09-15 13:16:36,223 INFO L129 PetriNetUnfolder]: 4/68 cut-off events. [2020-09-15 13:16:36,223 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-09-15 13:16:36,224 INFO L80 FinitePrefix]: Finished finitePrefix Result has 76 conditions, 68 events. 4/68 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 84 event pairs, 0 based on Foata normal form. 0/61 useless extension candidates. Maximal degree in co-relation 48. Up to 4 conditions per place. [2020-09-15 13:16:36,226 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 592 [2020-09-15 13:16:36,228 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-09-15 13:16:37,683 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 70 [2020-09-15 13:16:37,968 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 74 [2020-09-15 13:16:38,098 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-09-15 13:16:38,266 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 65 [2020-09-15 13:16:38,339 INFO L206 etLargeBlockEncoding]: Checked pairs total: 486 [2020-09-15 13:16:38,339 INFO L214 etLargeBlockEncoding]: Total number of compositions: 51 [2020-09-15 13:16:38,345 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 18 places, 12 transitions, 34 flow [2020-09-15 13:16:38,359 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-09-15 13:16:38,362 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-09-15 13:16:38,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-09-15 13:16:38,371 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:16:38,373 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-09-15 13:16:38,373 INFO L427 AbstractCegarLoop]: === Iteration 1 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-09-15 13:16:38,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:16:38,380 INFO L82 PathProgramCache]: Analyzing trace with hash 229686, now seen corresponding path program 1 times [2020-09-15 13:16:38,391 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:16:38,391 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316164240] [2020-09-15 13:16:38,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:16:38,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:16:38,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:16:38,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316164240] [2020-09-15 13:16:38,639 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 13:16:38,640 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-09-15 13:16:38,641 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808237732] [2020-09-15 13:16:38,647 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-15 13:16:38,648 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:16:38,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-15 13:16:38,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-15 13:16:38,672 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 3 states. [2020-09-15 13:16:38,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:16:38,724 INFO L93 Difference]: Finished difference Result 35 states and 59 transitions. [2020-09-15 13:16:38,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-15 13:16:38,727 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-09-15 13:16:38,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:16:38,746 INFO L225 Difference]: With dead ends: 35 [2020-09-15 13:16:38,747 INFO L226 Difference]: Without dead ends: 31 [2020-09-15 13:16:38,749 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-15 13:16:38,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-09-15 13:16:38,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-09-15 13:16:38,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-09-15 13:16:38,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 51 transitions. [2020-09-15 13:16:38,814 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 51 transitions. Word has length 3 [2020-09-15 13:16:38,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:16:38,815 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 51 transitions. [2020-09-15 13:16:38,816 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-15 13:16:38,817 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 51 transitions. [2020-09-15 13:16:38,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-09-15 13:16:38,818 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:16:38,818 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:16:38,818 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-15 13:16:38,819 INFO L427 AbstractCegarLoop]: === Iteration 2 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-09-15 13:16:38,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:16:38,820 INFO L82 PathProgramCache]: Analyzing trace with hash 1647647331, now seen corresponding path program 1 times [2020-09-15 13:16:38,820 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:16:38,821 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753987868] [2020-09-15 13:16:38,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:16:38,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:16:38,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:16:38,950 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753987868] [2020-09-15 13:16:38,950 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 13:16:38,951 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-15 13:16:38,951 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231576355] [2020-09-15 13:16:38,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-15 13:16:38,954 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:16:38,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-15 13:16:38,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-09-15 13:16:38,955 INFO L87 Difference]: Start difference. First operand 31 states and 51 transitions. Second operand 4 states. [2020-09-15 13:16:38,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:16:38,981 INFO L93 Difference]: Finished difference Result 26 states and 42 transitions. [2020-09-15 13:16:38,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-15 13:16:38,982 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-09-15 13:16:38,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:16:38,983 INFO L225 Difference]: With dead ends: 26 [2020-09-15 13:16:38,983 INFO L226 Difference]: Without dead ends: 24 [2020-09-15 13:16:38,984 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-09-15 13:16:38,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-09-15 13:16:38,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-09-15 13:16:38,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-09-15 13:16:38,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 39 transitions. [2020-09-15 13:16:38,989 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 39 transitions. Word has length 7 [2020-09-15 13:16:38,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:16:38,990 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 39 transitions. [2020-09-15 13:16:38,990 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-15 13:16:38,990 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 39 transitions. [2020-09-15 13:16:38,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-09-15 13:16:38,991 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:16:38,991 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2020-09-15 13:16:38,991 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-15 13:16:38,992 INFO L427 AbstractCegarLoop]: === Iteration 3 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-09-15 13:16:38,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:16:38,992 INFO L82 PathProgramCache]: Analyzing trace with hash -462538936, now seen corresponding path program 1 times [2020-09-15 13:16:38,993 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:16:38,993 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6615128] [2020-09-15 13:16:38,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:16:39,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-15 13:16:39,031 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-15 13:16:39,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-15 13:16:39,070 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-15 13:16:39,112 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-09-15 13:16:39,112 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-15 13:16:39,113 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-15 13:16:39,113 WARN L633 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-09-15 13:16:39,114 WARN L363 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2020-09-15 13:16:39,115 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2020-09-15 13:16:39,123 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread2of2ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:39,124 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread2of2ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:39,124 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:39,124 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:39,125 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:39,125 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:39,125 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:39,125 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of2ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:39,125 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of2ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:39,126 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:39,126 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:39,126 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:39,126 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:39,127 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:39,127 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of2ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:39,127 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of2ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:39,128 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of2ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:39,128 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of2ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:39,128 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of2ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:39,128 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of2ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:39,129 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of2ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:39,129 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of2ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:39,129 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of2ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:39,129 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of2ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:39,130 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of2ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:39,130 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of2ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:39,130 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of2ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:39,130 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of2ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:39,130 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of2ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:39,131 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of2ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:39,131 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of2ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:39,131 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of2ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:39,131 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of2ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:39,132 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of2ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:39,132 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:39,133 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:39,133 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of2ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:39,133 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:39,133 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of2ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:39,136 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:39,137 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:39,137 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:39,137 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread2of2ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:39,137 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread2of2ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:39,139 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of2ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:39,140 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of2ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:39,140 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of2ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:39,140 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of2ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:39,140 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of2ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:39,140 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of2ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:39,142 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of2ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:39,142 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of2ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:39,142 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of2ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:39,143 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of2ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:39,143 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of2ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:39,143 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of2ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:39,146 INFO L251 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-09-15 13:16:39,146 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-15 13:16:39,146 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-15 13:16:39,146 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-15 13:16:39,147 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-15 13:16:39,147 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-15 13:16:39,147 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-15 13:16:39,147 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-15 13:16:39,147 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-15 13:16:39,150 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 80 places, 74 transitions, 172 flow [2020-09-15 13:16:39,150 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 80 places, 74 transitions, 172 flow [2020-09-15 13:16:39,172 INFO L129 PetriNetUnfolder]: 5/89 cut-off events. [2020-09-15 13:16:39,172 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2020-09-15 13:16:39,174 INFO L80 FinitePrefix]: Finished finitePrefix Result has 103 conditions, 89 events. 5/89 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 120 event pairs, 0 based on Foata normal form. 0/80 useless extension candidates. Maximal degree in co-relation 98. Up to 6 conditions per place. [2020-09-15 13:16:39,176 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 80 places, 74 transitions, 172 flow [2020-09-15 13:16:39,194 INFO L129 PetriNetUnfolder]: 5/89 cut-off events. [2020-09-15 13:16:39,195 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2020-09-15 13:16:39,196 INFO L80 FinitePrefix]: Finished finitePrefix Result has 103 conditions, 89 events. 5/89 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 120 event pairs, 0 based on Foata normal form. 0/80 useless extension candidates. Maximal degree in co-relation 98. Up to 6 conditions per place. [2020-09-15 13:16:39,198 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 920 [2020-09-15 13:16:39,199 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-09-15 13:16:40,491 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-09-15 13:16:40,643 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 45 [2020-09-15 13:16:40,896 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 77 [2020-09-15 13:16:41,061 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 65 [2020-09-15 13:16:41,068 INFO L206 etLargeBlockEncoding]: Checked pairs total: 942 [2020-09-15 13:16:41,069 INFO L214 etLargeBlockEncoding]: Total number of compositions: 62 [2020-09-15 13:16:41,069 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 31 places, 21 transitions, 66 flow [2020-09-15 13:16:41,083 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 224 states. [2020-09-15 13:16:41,083 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states. [2020-09-15 13:16:41,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-09-15 13:16:41,084 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:16:41,084 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-09-15 13:16:41,084 INFO L427 AbstractCegarLoop]: === Iteration 1 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:16:41,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:16:41,085 INFO L82 PathProgramCache]: Analyzing trace with hash 384194, now seen corresponding path program 1 times [2020-09-15 13:16:41,085 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:16:41,085 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393062440] [2020-09-15 13:16:41,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:16:41,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:16:41,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:16:41,147 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393062440] [2020-09-15 13:16:41,147 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 13:16:41,147 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-09-15 13:16:41,147 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789081980] [2020-09-15 13:16:41,148 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-15 13:16:41,148 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:16:41,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-15 13:16:41,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-15 13:16:41,149 INFO L87 Difference]: Start difference. First operand 224 states. Second operand 3 states. [2020-09-15 13:16:41,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:16:41,202 INFO L93 Difference]: Finished difference Result 185 states and 459 transitions. [2020-09-15 13:16:41,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-15 13:16:41,203 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-09-15 13:16:41,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:16:41,209 INFO L225 Difference]: With dead ends: 185 [2020-09-15 13:16:41,209 INFO L226 Difference]: Without dead ends: 171 [2020-09-15 13:16:41,209 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-15 13:16:41,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-09-15 13:16:41,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2020-09-15 13:16:41,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-09-15 13:16:41,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 418 transitions. [2020-09-15 13:16:41,238 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 418 transitions. Word has length 3 [2020-09-15 13:16:41,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:16:41,239 INFO L479 AbstractCegarLoop]: Abstraction has 171 states and 418 transitions. [2020-09-15 13:16:41,239 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-15 13:16:41,239 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 418 transitions. [2020-09-15 13:16:41,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-09-15 13:16:41,240 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:16:41,240 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:16:41,240 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-15 13:16:41,240 INFO L427 AbstractCegarLoop]: === Iteration 2 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:16:41,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:16:41,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1694917346, now seen corresponding path program 1 times [2020-09-15 13:16:41,241 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:16:41,242 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884284760] [2020-09-15 13:16:41,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:16:41,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:16:41,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:16:41,328 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884284760] [2020-09-15 13:16:41,328 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 13:16:41,328 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-15 13:16:41,329 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269101251] [2020-09-15 13:16:41,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-15 13:16:41,329 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:16:41,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-15 13:16:41,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-15 13:16:41,330 INFO L87 Difference]: Start difference. First operand 171 states and 418 transitions. Second operand 5 states. [2020-09-15 13:16:41,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:16:41,453 INFO L93 Difference]: Finished difference Result 205 states and 460 transitions. [2020-09-15 13:16:41,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-15 13:16:41,457 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2020-09-15 13:16:41,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:16:41,460 INFO L225 Difference]: With dead ends: 205 [2020-09-15 13:16:41,461 INFO L226 Difference]: Without dead ends: 201 [2020-09-15 13:16:41,461 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-15 13:16:41,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-09-15 13:16:41,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 162. [2020-09-15 13:16:41,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-15 13:16:41,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 399 transitions. [2020-09-15 13:16:41,487 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 399 transitions. Word has length 9 [2020-09-15 13:16:41,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:16:41,487 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 399 transitions. [2020-09-15 13:16:41,488 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-15 13:16:41,488 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 399 transitions. [2020-09-15 13:16:41,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 13:16:41,489 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:16:41,489 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:16:41,489 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-15 13:16:41,490 INFO L427 AbstractCegarLoop]: === Iteration 3 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:16:41,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:16:41,490 INFO L82 PathProgramCache]: Analyzing trace with hash 1027741454, now seen corresponding path program 1 times [2020-09-15 13:16:41,490 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:16:41,491 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696434144] [2020-09-15 13:16:41,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:16:41,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:16:41,575 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-15 13:16:41,576 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696434144] [2020-09-15 13:16:41,576 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 13:16:41,576 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-15 13:16:41,577 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417313553] [2020-09-15 13:16:41,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-15 13:16:41,578 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:16:41,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-15 13:16:41,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-15 13:16:41,578 INFO L87 Difference]: Start difference. First operand 162 states and 399 transitions. Second operand 5 states. [2020-09-15 13:16:41,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:16:41,670 INFO L93 Difference]: Finished difference Result 189 states and 423 transitions. [2020-09-15 13:16:41,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-15 13:16:41,671 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-09-15 13:16:41,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:16:41,673 INFO L225 Difference]: With dead ends: 189 [2020-09-15 13:16:41,673 INFO L226 Difference]: Without dead ends: 185 [2020-09-15 13:16:41,674 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-15 13:16:41,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-09-15 13:16:41,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 153. [2020-09-15 13:16:41,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-09-15 13:16:41,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 367 transitions. [2020-09-15 13:16:41,690 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 367 transitions. Word has length 13 [2020-09-15 13:16:41,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:16:41,692 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 367 transitions. [2020-09-15 13:16:41,692 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-15 13:16:41,692 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 367 transitions. [2020-09-15 13:16:41,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 13:16:41,694 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:16:41,694 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:16:41,694 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-15 13:16:41,695 INFO L427 AbstractCegarLoop]: === Iteration 4 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:16:41,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:16:41,695 INFO L82 PathProgramCache]: Analyzing trace with hash 1792799235, now seen corresponding path program 1 times [2020-09-15 13:16:41,696 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:16:41,696 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516344617] [2020-09-15 13:16:41,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:16:41,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-15 13:16:41,721 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-15 13:16:41,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-15 13:16:41,756 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-15 13:16:41,775 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-09-15 13:16:41,776 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-15 13:16:41,776 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-15 13:16:41,776 WARN L633 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-09-15 13:16:41,782 WARN L363 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2020-09-15 13:16:41,784 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2020-09-15 13:16:41,805 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:41,806 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:41,806 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:41,806 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:41,807 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:41,807 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:41,807 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:41,807 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread2of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:41,808 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread2of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:41,808 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:41,808 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:41,808 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:41,808 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:41,809 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:41,809 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread3of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:41,809 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread3of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:41,810 WARN L313 ript$VariableManager]: TermVariabe thr2Thread3of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:41,810 WARN L313 ript$VariableManager]: TermVariabe thr2Thread3of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:41,810 WARN L313 ript$VariableManager]: TermVariabe thr2Thread3of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:41,810 WARN L313 ript$VariableManager]: TermVariabe thr2Thread3of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:41,810 WARN L313 ript$VariableManager]: TermVariabe thr2Thread3of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:41,811 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread3of3ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:41,811 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread3of3ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:41,812 WARN L313 ript$VariableManager]: TermVariabe thr1Thread3of3ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:41,812 WARN L313 ript$VariableManager]: TermVariabe thr1Thread3of3ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:41,812 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread3of3ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:41,812 WARN L313 ript$VariableManager]: TermVariabe thr1Thread3of3ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:41,813 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread3of3ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:41,813 WARN L313 ript$VariableManager]: TermVariabe thr1Thread3of3ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:41,813 WARN L313 ript$VariableManager]: TermVariabe thr1Thread3of3ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:41,813 WARN L313 ript$VariableManager]: TermVariabe thr1Thread3of3ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:41,814 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of3ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:41,814 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of3ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:41,814 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of3ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:41,815 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of3ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:41,815 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of3ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:41,815 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of3ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:41,816 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of3ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:41,816 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of3ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:41,816 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of3ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:41,816 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of3ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:41,817 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of3ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:41,817 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of3ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:41,817 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of3ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:41,817 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of3ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:41,818 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of3ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:41,818 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of3ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:41,818 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of3ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:41,818 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of3ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:41,819 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of3ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:41,819 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of3ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:41,820 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:41,820 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:41,820 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:41,820 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:41,821 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:41,822 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:41,822 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread2of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:41,823 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread2of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:41,823 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:41,823 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:41,825 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread3of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:41,825 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread3of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:41,825 WARN L313 ript$VariableManager]: TermVariabe thr2Thread3of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:41,826 WARN L313 ript$VariableManager]: TermVariabe thr2Thread3of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:41,826 WARN L313 ript$VariableManager]: TermVariabe thr2Thread3of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:41,828 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of3ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:41,828 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of3ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:41,828 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of3ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:41,829 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of3ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:41,829 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of3ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:41,829 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of3ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:41,831 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of3ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:41,831 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of3ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:41,831 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of3ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:41,831 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of3ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:41,832 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of3ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:41,832 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of3ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:41,834 WARN L313 ript$VariableManager]: TermVariabe thr1Thread3of3ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:41,834 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread3of3ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:41,834 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread3of3ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:41,834 WARN L313 ript$VariableManager]: TermVariabe thr1Thread3of3ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:41,835 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread3of3ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:41,835 WARN L313 ript$VariableManager]: TermVariabe thr1Thread3of3ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:41,836 INFO L251 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2020-09-15 13:16:41,837 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-15 13:16:41,837 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-15 13:16:41,837 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-15 13:16:41,837 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-15 13:16:41,838 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-15 13:16:41,838 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-15 13:16:41,838 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-15 13:16:41,838 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-15 13:16:41,840 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 99 places, 90 transitions, 222 flow [2020-09-15 13:16:41,841 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 99 places, 90 transitions, 222 flow [2020-09-15 13:16:41,880 INFO L129 PetriNetUnfolder]: 6/110 cut-off events. [2020-09-15 13:16:41,881 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2020-09-15 13:16:41,882 INFO L80 FinitePrefix]: Finished finitePrefix Result has 131 conditions, 110 events. 6/110 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 163 event pairs, 0 based on Foata normal form. 0/99 useless extension candidates. Maximal degree in co-relation 124. Up to 8 conditions per place. [2020-09-15 13:16:41,884 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 99 places, 90 transitions, 222 flow [2020-09-15 13:16:41,899 INFO L129 PetriNetUnfolder]: 6/110 cut-off events. [2020-09-15 13:16:41,899 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2020-09-15 13:16:41,900 INFO L80 FinitePrefix]: Finished finitePrefix Result has 131 conditions, 110 events. 6/110 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 163 event pairs, 0 based on Foata normal form. 0/99 useless extension candidates. Maximal degree in co-relation 124. Up to 8 conditions per place. [2020-09-15 13:16:41,904 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 1308 [2020-09-15 13:16:41,904 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-09-15 13:16:43,444 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2020-09-15 13:16:43,750 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 75 [2020-09-15 13:16:43,929 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 65 [2020-09-15 13:16:43,937 INFO L206 etLargeBlockEncoding]: Checked pairs total: 1426 [2020-09-15 13:16:43,937 INFO L214 etLargeBlockEncoding]: Total number of compositions: 74 [2020-09-15 13:16:43,938 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 41 places, 27 transitions, 96 flow [2020-09-15 13:16:43,969 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 683 states. [2020-09-15 13:16:43,969 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states. [2020-09-15 13:16:43,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-09-15 13:16:43,970 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:16:43,970 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-09-15 13:16:43,970 INFO L427 AbstractCegarLoop]: === Iteration 1 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:16:43,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:16:43,971 INFO L82 PathProgramCache]: Analyzing trace with hash 567457, now seen corresponding path program 1 times [2020-09-15 13:16:43,971 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:16:43,972 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404876189] [2020-09-15 13:16:43,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:16:43,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:16:44,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:16:44,018 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404876189] [2020-09-15 13:16:44,018 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 13:16:44,019 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-09-15 13:16:44,019 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473324771] [2020-09-15 13:16:44,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-15 13:16:44,019 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:16:44,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-15 13:16:44,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-15 13:16:44,020 INFO L87 Difference]: Start difference. First operand 683 states. Second operand 3 states. [2020-09-15 13:16:44,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:16:44,057 INFO L93 Difference]: Finished difference Result 600 states and 1886 transitions. [2020-09-15 13:16:44,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-15 13:16:44,057 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-09-15 13:16:44,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:16:44,064 INFO L225 Difference]: With dead ends: 600 [2020-09-15 13:16:44,064 INFO L226 Difference]: Without dead ends: 559 [2020-09-15 13:16:44,065 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-15 13:16:44,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2020-09-15 13:16:44,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 559. [2020-09-15 13:16:44,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 559 states. [2020-09-15 13:16:44,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 1737 transitions. [2020-09-15 13:16:44,116 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 1737 transitions. Word has length 3 [2020-09-15 13:16:44,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:16:44,116 INFO L479 AbstractCegarLoop]: Abstraction has 559 states and 1737 transitions. [2020-09-15 13:16:44,116 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-15 13:16:44,116 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 1737 transitions. [2020-09-15 13:16:44,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-09-15 13:16:44,120 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:16:44,120 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:16:44,121 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-15 13:16:44,121 INFO L427 AbstractCegarLoop]: === Iteration 2 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:16:44,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:16:44,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1052273544, now seen corresponding path program 1 times [2020-09-15 13:16:44,125 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:16:44,125 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122804940] [2020-09-15 13:16:44,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:16:44,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:16:44,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:16:44,189 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122804940] [2020-09-15 13:16:44,190 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 13:16:44,190 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-15 13:16:44,190 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038858445] [2020-09-15 13:16:44,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-15 13:16:44,191 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:16:44,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-15 13:16:44,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-15 13:16:44,191 INFO L87 Difference]: Start difference. First operand 559 states and 1737 transitions. Second operand 5 states. [2020-09-15 13:16:44,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:16:44,319 INFO L93 Difference]: Finished difference Result 817 states and 2317 transitions. [2020-09-15 13:16:44,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-15 13:16:44,320 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2020-09-15 13:16:44,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:16:44,327 INFO L225 Difference]: With dead ends: 817 [2020-09-15 13:16:44,328 INFO L226 Difference]: Without dead ends: 812 [2020-09-15 13:16:44,328 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-15 13:16:44,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2020-09-15 13:16:44,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 585. [2020-09-15 13:16:44,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 585 states. [2020-09-15 13:16:44,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 1832 transitions. [2020-09-15 13:16:44,363 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 1832 transitions. Word has length 9 [2020-09-15 13:16:44,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:16:44,363 INFO L479 AbstractCegarLoop]: Abstraction has 585 states and 1832 transitions. [2020-09-15 13:16:44,363 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-15 13:16:44,363 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 1832 transitions. [2020-09-15 13:16:44,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 13:16:44,365 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:16:44,365 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:16:44,365 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-15 13:16:44,366 INFO L427 AbstractCegarLoop]: === Iteration 3 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:16:44,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:16:44,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1096280394, now seen corresponding path program 1 times [2020-09-15 13:16:44,366 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:16:44,367 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229453926] [2020-09-15 13:16:44,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:16:44,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:16:44,463 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-15 13:16:44,464 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229453926] [2020-09-15 13:16:44,464 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 13:16:44,464 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-15 13:16:44,464 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826860881] [2020-09-15 13:16:44,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-15 13:16:44,465 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:16:44,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-15 13:16:44,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-15 13:16:44,466 INFO L87 Difference]: Start difference. First operand 585 states and 1832 transitions. Second operand 5 states. [2020-09-15 13:16:44,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:16:44,568 INFO L93 Difference]: Finished difference Result 843 states and 2406 transitions. [2020-09-15 13:16:44,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-15 13:16:44,569 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-09-15 13:16:44,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:16:44,576 INFO L225 Difference]: With dead ends: 843 [2020-09-15 13:16:44,576 INFO L226 Difference]: Without dead ends: 836 [2020-09-15 13:16:44,577 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-15 13:16:44,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2020-09-15 13:16:44,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 611. [2020-09-15 13:16:44,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 611 states. [2020-09-15 13:16:44,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 611 states to 611 states and 1906 transitions. [2020-09-15 13:16:44,605 INFO L78 Accepts]: Start accepts. Automaton has 611 states and 1906 transitions. Word has length 13 [2020-09-15 13:16:44,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:16:44,606 INFO L479 AbstractCegarLoop]: Abstraction has 611 states and 1906 transitions. [2020-09-15 13:16:44,606 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-15 13:16:44,606 INFO L276 IsEmpty]: Start isEmpty. Operand 611 states and 1906 transitions. [2020-09-15 13:16:44,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-15 13:16:44,607 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:16:44,607 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:16:44,608 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-15 13:16:44,608 INFO L427 AbstractCegarLoop]: === Iteration 4 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:16:44,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:16:44,608 INFO L82 PathProgramCache]: Analyzing trace with hash 2044985054, now seen corresponding path program 1 times [2020-09-15 13:16:44,609 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:16:44,609 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120572938] [2020-09-15 13:16:44,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:16:44,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:16:44,701 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:16:44,701 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120572938] [2020-09-15 13:16:44,702 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629158723] [2020-09-15 13:16:44,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:16:44,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:16:44,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-15 13:16:44,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:16:44,891 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:16:44,891 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:16:44,892 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-09-15 13:16:44,892 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062755380] [2020-09-15 13:16:44,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-15 13:16:44,893 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:16:44,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-15 13:16:44,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-09-15 13:16:44,894 INFO L87 Difference]: Start difference. First operand 611 states and 1906 transitions. Second operand 12 states. [2020-09-15 13:16:45,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:16:45,223 INFO L93 Difference]: Finished difference Result 1059 states and 2818 transitions. [2020-09-15 13:16:45,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-15 13:16:45,224 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-15 13:16:45,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:16:45,233 INFO L225 Difference]: With dead ends: 1059 [2020-09-15 13:16:45,234 INFO L226 Difference]: Without dead ends: 1052 [2020-09-15 13:16:45,235 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2020-09-15 13:16:45,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1052 states. [2020-09-15 13:16:45,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1052 to 591. [2020-09-15 13:16:45,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 591 states. [2020-09-15 13:16:45,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 1840 transitions. [2020-09-15 13:16:45,276 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 1840 transitions. Word has length 15 [2020-09-15 13:16:45,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:16:45,276 INFO L479 AbstractCegarLoop]: Abstraction has 591 states and 1840 transitions. [2020-09-15 13:16:45,277 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-15 13:16:45,277 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 1840 transitions. [2020-09-15 13:16:45,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-15 13:16:45,279 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:16:45,279 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:16:45,495 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-09-15 13:16:45,495 INFO L427 AbstractCegarLoop]: === Iteration 5 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:16:45,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:16:45,496 INFO L82 PathProgramCache]: Analyzing trace with hash 1258473782, now seen corresponding path program 2 times [2020-09-15 13:16:45,496 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:16:45,497 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640222289] [2020-09-15 13:16:45,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:16:45,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:16:45,635 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-15 13:16:45,635 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640222289] [2020-09-15 13:16:45,635 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 13:16:45,635 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-15 13:16:45,636 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214320553] [2020-09-15 13:16:45,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-15 13:16:45,636 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:16:45,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-15 13:16:45,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-15 13:16:45,637 INFO L87 Difference]: Start difference. First operand 591 states and 1840 transitions. Second operand 7 states. [2020-09-15 13:16:45,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:16:45,948 INFO L93 Difference]: Finished difference Result 1053 states and 2807 transitions. [2020-09-15 13:16:45,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-15 13:16:45,948 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-09-15 13:16:45,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:16:45,956 INFO L225 Difference]: With dead ends: 1053 [2020-09-15 13:16:45,956 INFO L226 Difference]: Without dead ends: 1045 [2020-09-15 13:16:45,957 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-09-15 13:16:45,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1045 states. [2020-09-15 13:16:45,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1045 to 536. [2020-09-15 13:16:45,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 536 states. [2020-09-15 13:16:45,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 1688 transitions. [2020-09-15 13:16:45,983 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 1688 transitions. Word has length 15 [2020-09-15 13:16:45,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:16:45,983 INFO L479 AbstractCegarLoop]: Abstraction has 536 states and 1688 transitions. [2020-09-15 13:16:45,984 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-15 13:16:45,984 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 1688 transitions. [2020-09-15 13:16:45,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-15 13:16:45,985 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:16:45,985 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:16:45,985 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-15 13:16:45,985 INFO L427 AbstractCegarLoop]: === Iteration 6 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:16:45,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:16:45,986 INFO L82 PathProgramCache]: Analyzing trace with hash 1734594488, now seen corresponding path program 1 times [2020-09-15 13:16:45,986 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:16:45,986 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563097724] [2020-09-15 13:16:45,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:16:46,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:16:46,081 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-09-15 13:16:46,082 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563097724] [2020-09-15 13:16:46,082 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 13:16:46,082 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-15 13:16:46,083 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540936749] [2020-09-15 13:16:46,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-15 13:16:46,083 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:16:46,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-15 13:16:46,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-15 13:16:46,084 INFO L87 Difference]: Start difference. First operand 536 states and 1688 transitions. Second operand 5 states. [2020-09-15 13:16:46,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:16:46,197 INFO L93 Difference]: Finished difference Result 736 states and 2123 transitions. [2020-09-15 13:16:46,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-15 13:16:46,199 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-09-15 13:16:46,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:16:46,204 INFO L225 Difference]: With dead ends: 736 [2020-09-15 13:16:46,205 INFO L226 Difference]: Without dead ends: 728 [2020-09-15 13:16:46,205 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-15 13:16:46,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2020-09-15 13:16:46,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 549. [2020-09-15 13:16:46,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 549 states. [2020-09-15 13:16:46,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 1684 transitions. [2020-09-15 13:16:46,229 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 1684 transitions. Word has length 17 [2020-09-15 13:16:46,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:16:46,230 INFO L479 AbstractCegarLoop]: Abstraction has 549 states and 1684 transitions. [2020-09-15 13:16:46,230 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-15 13:16:46,230 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 1684 transitions. [2020-09-15 13:16:46,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-15 13:16:46,231 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:16:46,231 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:16:46,232 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-15 13:16:46,232 INFO L427 AbstractCegarLoop]: === Iteration 7 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:16:46,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:16:46,232 INFO L82 PathProgramCache]: Analyzing trace with hash -2065233823, now seen corresponding path program 1 times [2020-09-15 13:16:46,233 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:16:46,233 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219802751] [2020-09-15 13:16:46,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:16:46,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-15 13:16:46,262 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-15 13:16:46,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-15 13:16:46,280 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-15 13:16:46,293 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-09-15 13:16:46,294 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-15 13:16:46,294 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-15 13:16:46,294 WARN L633 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-09-15 13:16:46,295 WARN L363 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2020-09-15 13:16:46,296 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2020-09-15 13:16:46,315 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread4of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:46,315 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread4of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:46,315 WARN L313 ript$VariableManager]: TermVariabe thr2Thread4of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:46,316 WARN L313 ript$VariableManager]: TermVariabe thr2Thread4of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:46,316 WARN L313 ript$VariableManager]: TermVariabe thr2Thread4of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:46,316 WARN L313 ript$VariableManager]: TermVariabe thr2Thread4of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:46,316 WARN L313 ript$VariableManager]: TermVariabe thr2Thread4of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:46,316 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread3of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:46,317 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread3of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:46,317 WARN L313 ript$VariableManager]: TermVariabe thr2Thread3of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:46,317 WARN L313 ript$VariableManager]: TermVariabe thr2Thread3of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:46,317 WARN L313 ript$VariableManager]: TermVariabe thr2Thread3of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:46,317 WARN L313 ript$VariableManager]: TermVariabe thr2Thread3of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:46,318 WARN L313 ript$VariableManager]: TermVariabe thr2Thread3of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:46,318 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread2of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:46,318 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread2of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:46,318 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:46,318 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:46,318 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:46,319 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:46,319 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:46,319 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:46,319 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:46,319 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:46,319 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:46,320 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:46,320 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:46,320 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:46,320 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread3of4ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:46,320 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread3of4ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:46,321 WARN L313 ript$VariableManager]: TermVariabe thr1Thread3of4ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:46,321 WARN L313 ript$VariableManager]: TermVariabe thr1Thread3of4ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:46,321 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread3of4ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:46,321 WARN L313 ript$VariableManager]: TermVariabe thr1Thread3of4ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:46,322 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread3of4ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:46,322 WARN L313 ript$VariableManager]: TermVariabe thr1Thread3of4ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:46,322 WARN L313 ript$VariableManager]: TermVariabe thr1Thread3of4ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:46,322 WARN L313 ript$VariableManager]: TermVariabe thr1Thread3of4ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:46,323 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread4of4ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:46,323 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread4of4ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:46,323 WARN L313 ript$VariableManager]: TermVariabe thr1Thread4of4ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:46,323 WARN L313 ript$VariableManager]: TermVariabe thr1Thread4of4ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:46,323 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread4of4ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:46,324 WARN L313 ript$VariableManager]: TermVariabe thr1Thread4of4ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:46,324 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread4of4ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:46,324 WARN L313 ript$VariableManager]: TermVariabe thr1Thread4of4ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:46,324 WARN L313 ript$VariableManager]: TermVariabe thr1Thread4of4ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:46,324 WARN L313 ript$VariableManager]: TermVariabe thr1Thread4of4ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:46,325 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of4ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:46,325 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of4ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:46,325 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of4ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:46,325 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of4ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:46,326 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of4ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:46,326 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of4ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:46,326 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of4ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:46,326 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of4ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:46,326 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of4ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:46,326 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of4ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:46,327 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of4ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:46,327 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of4ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:46,327 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of4ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:46,327 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of4ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:46,327 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of4ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:46,328 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of4ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:46,328 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of4ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:46,328 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of4ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:46,328 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of4ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:46,328 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of4ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:46,329 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:46,329 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:46,329 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:46,329 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:46,329 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:46,331 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:46,332 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:46,332 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread2of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:46,332 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread2of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:46,332 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:46,334 WARN L313 ript$VariableManager]: TermVariabe thr2Thread3of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:46,334 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread3of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:46,334 WARN L313 ript$VariableManager]: TermVariabe thr2Thread3of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:46,334 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread3of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:46,334 WARN L313 ript$VariableManager]: TermVariabe thr2Thread3of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:46,336 WARN L313 ript$VariableManager]: TermVariabe thr2Thread4of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:46,337 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread4of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:46,337 WARN L313 ript$VariableManager]: TermVariabe thr2Thread4of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:46,337 WARN L313 ript$VariableManager]: TermVariabe thr2Thread4of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:46,337 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread4of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:46,339 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of4ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:46,339 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of4ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:46,340 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of4ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:46,340 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of4ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:46,340 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of4ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:46,340 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of4ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:46,342 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of4ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:46,342 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of4ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:46,342 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of4ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:46,343 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of4ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:46,343 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of4ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:46,343 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of4ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:46,344 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread3of4ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:46,346 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread3of4ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:46,346 WARN L313 ript$VariableManager]: TermVariabe thr1Thread3of4ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:46,346 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread3of4ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:46,346 WARN L313 ript$VariableManager]: TermVariabe thr1Thread3of4ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:46,346 WARN L313 ript$VariableManager]: TermVariabe thr1Thread3of4ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:46,348 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread4of4ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:46,348 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread4of4ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:46,349 WARN L313 ript$VariableManager]: TermVariabe thr1Thread4of4ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:46,349 WARN L313 ript$VariableManager]: TermVariabe thr1Thread4of4ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:46,349 WARN L313 ript$VariableManager]: TermVariabe thr1Thread4of4ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:46,349 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread4of4ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:16:46,351 INFO L251 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2020-09-15 13:16:46,351 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-15 13:16:46,351 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-15 13:16:46,351 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-15 13:16:46,351 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-15 13:16:46,352 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-15 13:16:46,352 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-15 13:16:46,352 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-15 13:16:46,352 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-15 13:16:46,354 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 118 places, 106 transitions, 276 flow [2020-09-15 13:16:46,355 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 118 places, 106 transitions, 276 flow [2020-09-15 13:16:46,391 INFO L129 PetriNetUnfolder]: 7/131 cut-off events. [2020-09-15 13:16:46,392 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2020-09-15 13:16:46,394 INFO L80 FinitePrefix]: Finished finitePrefix Result has 160 conditions, 131 events. 7/131 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 201 event pairs, 0 based on Foata normal form. 0/118 useless extension candidates. Maximal degree in co-relation 151. Up to 10 conditions per place. [2020-09-15 13:16:46,397 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 118 places, 106 transitions, 276 flow [2020-09-15 13:16:46,425 INFO L129 PetriNetUnfolder]: 7/131 cut-off events. [2020-09-15 13:16:46,425 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2020-09-15 13:16:46,427 INFO L80 FinitePrefix]: Finished finitePrefix Result has 160 conditions, 131 events. 7/131 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 201 event pairs, 0 based on Foata normal form. 0/118 useless extension candidates. Maximal degree in co-relation 151. Up to 10 conditions per place. [2020-09-15 13:16:46,430 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 1756 [2020-09-15 13:16:46,431 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-09-15 13:16:48,140 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2020-09-15 13:16:48,246 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-09-15 13:16:48,483 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 76 [2020-09-15 13:16:48,692 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 71 [2020-09-15 13:16:48,800 INFO L206 etLargeBlockEncoding]: Checked pairs total: 2033 [2020-09-15 13:16:48,800 INFO L214 etLargeBlockEncoding]: Total number of compositions: 86 [2020-09-15 13:16:48,800 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 51 places, 33 transitions, 130 flow [2020-09-15 13:16:48,920 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 2060 states. [2020-09-15 13:16:48,921 INFO L276 IsEmpty]: Start isEmpty. Operand 2060 states. [2020-09-15 13:16:48,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-09-15 13:16:48,921 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:16:48,921 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-09-15 13:16:48,922 INFO L427 AbstractCegarLoop]: === Iteration 1 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-09-15 13:16:48,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:16:48,922 INFO L82 PathProgramCache]: Analyzing trace with hash 779528, now seen corresponding path program 1 times [2020-09-15 13:16:48,922 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:16:48,923 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950966929] [2020-09-15 13:16:48,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:16:48,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:16:48,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:16:48,953 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950966929] [2020-09-15 13:16:48,953 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 13:16:48,954 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-09-15 13:16:48,954 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587211816] [2020-09-15 13:16:48,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-15 13:16:48,954 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:16:48,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-15 13:16:48,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-15 13:16:48,955 INFO L87 Difference]: Start difference. First operand 2060 states. Second operand 3 states. [2020-09-15 13:16:49,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:16:49,001 INFO L93 Difference]: Finished difference Result 1889 states and 7217 transitions. [2020-09-15 13:16:49,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-15 13:16:49,002 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-09-15 13:16:49,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:16:49,020 INFO L225 Difference]: With dead ends: 1889 [2020-09-15 13:16:49,020 INFO L226 Difference]: Without dead ends: 1767 [2020-09-15 13:16:49,020 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-15 13:16:49,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1767 states. [2020-09-15 13:16:49,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1767 to 1767. [2020-09-15 13:16:49,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1767 states. [2020-09-15 13:16:49,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1767 states to 1767 states and 6690 transitions. [2020-09-15 13:16:49,135 INFO L78 Accepts]: Start accepts. Automaton has 1767 states and 6690 transitions. Word has length 3 [2020-09-15 13:16:49,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:16:49,135 INFO L479 AbstractCegarLoop]: Abstraction has 1767 states and 6690 transitions. [2020-09-15 13:16:49,135 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-15 13:16:49,135 INFO L276 IsEmpty]: Start isEmpty. Operand 1767 states and 6690 transitions. [2020-09-15 13:16:49,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-09-15 13:16:49,136 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:16:49,136 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:16:49,136 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-15 13:16:49,136 INFO L427 AbstractCegarLoop]: === Iteration 2 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-09-15 13:16:49,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:16:49,137 INFO L82 PathProgramCache]: Analyzing trace with hash -666106918, now seen corresponding path program 1 times [2020-09-15 13:16:49,137 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:16:49,137 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618795250] [2020-09-15 13:16:49,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:16:49,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:16:49,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:16:49,190 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618795250] [2020-09-15 13:16:49,190 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 13:16:49,190 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-15 13:16:49,191 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328140363] [2020-09-15 13:16:49,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-15 13:16:49,191 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:16:49,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-15 13:16:49,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-15 13:16:49,192 INFO L87 Difference]: Start difference. First operand 1767 states and 6690 transitions. Second operand 5 states. [2020-09-15 13:16:49,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:16:49,336 INFO L93 Difference]: Finished difference Result 2905 states and 10138 transitions. [2020-09-15 13:16:49,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-15 13:16:49,337 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2020-09-15 13:16:49,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:16:49,362 INFO L225 Difference]: With dead ends: 2905 [2020-09-15 13:16:49,362 INFO L226 Difference]: Without dead ends: 2899 [2020-09-15 13:16:49,363 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-15 13:16:49,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2899 states. [2020-09-15 13:16:49,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2899 to 1966. [2020-09-15 13:16:49,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1966 states. [2020-09-15 13:16:49,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1966 states to 1966 states and 7503 transitions. [2020-09-15 13:16:49,474 INFO L78 Accepts]: Start accepts. Automaton has 1966 states and 7503 transitions. Word has length 9 [2020-09-15 13:16:49,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:16:49,475 INFO L479 AbstractCegarLoop]: Abstraction has 1966 states and 7503 transitions. [2020-09-15 13:16:49,475 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-15 13:16:49,475 INFO L276 IsEmpty]: Start isEmpty. Operand 1966 states and 7503 transitions. [2020-09-15 13:16:49,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 13:16:49,476 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:16:49,476 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:16:49,476 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-15 13:16:49,476 INFO L427 AbstractCegarLoop]: === Iteration 3 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-09-15 13:16:49,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:16:49,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1766896000, now seen corresponding path program 1 times [2020-09-15 13:16:49,477 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:16:49,477 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031799755] [2020-09-15 13:16:49,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:16:49,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:16:49,536 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-15 13:16:49,536 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031799755] [2020-09-15 13:16:49,537 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 13:16:49,537 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-15 13:16:49,537 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678436589] [2020-09-15 13:16:49,537 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-15 13:16:49,538 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:16:49,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-15 13:16:49,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-15 13:16:49,538 INFO L87 Difference]: Start difference. First operand 1966 states and 7503 transitions. Second operand 5 states. [2020-09-15 13:16:49,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:16:49,664 INFO L93 Difference]: Finished difference Result 3204 states and 11312 transitions. [2020-09-15 13:16:49,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-15 13:16:49,670 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-09-15 13:16:49,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:16:49,698 INFO L225 Difference]: With dead ends: 3204 [2020-09-15 13:16:49,698 INFO L226 Difference]: Without dead ends: 3194 [2020-09-15 13:16:49,699 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-15 13:16:49,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3194 states. [2020-09-15 13:16:49,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3194 to 2200. [2020-09-15 13:16:49,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2200 states. [2020-09-15 13:16:49,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2200 states to 2200 states and 8453 transitions. [2020-09-15 13:16:49,811 INFO L78 Accepts]: Start accepts. Automaton has 2200 states and 8453 transitions. Word has length 13 [2020-09-15 13:16:49,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:16:49,811 INFO L479 AbstractCegarLoop]: Abstraction has 2200 states and 8453 transitions. [2020-09-15 13:16:49,811 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-15 13:16:49,812 INFO L276 IsEmpty]: Start isEmpty. Operand 2200 states and 8453 transitions. [2020-09-15 13:16:49,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-15 13:16:49,812 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:16:49,812 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:16:49,813 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-15 13:16:49,813 INFO L427 AbstractCegarLoop]: === Iteration 4 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-09-15 13:16:49,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:16:49,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1022394712, now seen corresponding path program 1 times [2020-09-15 13:16:49,814 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:16:49,814 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514939485] [2020-09-15 13:16:49,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:16:49,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:16:49,913 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:16:49,913 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514939485] [2020-09-15 13:16:49,914 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142513163] [2020-09-15 13:16:49,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:16:49,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:16:49,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-15 13:16:49,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:16:50,071 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:16:50,072 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:16:50,072 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-09-15 13:16:50,072 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388969717] [2020-09-15 13:16:50,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-15 13:16:50,073 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:16:50,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-15 13:16:50,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-09-15 13:16:50,074 INFO L87 Difference]: Start difference. First operand 2200 states and 8453 transitions. Second operand 12 states. [2020-09-15 13:16:50,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:16:50,506 INFO L93 Difference]: Finished difference Result 4556 states and 14911 transitions. [2020-09-15 13:16:50,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-15 13:16:50,506 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-15 13:16:50,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:16:50,533 INFO L225 Difference]: With dead ends: 4556 [2020-09-15 13:16:50,533 INFO L226 Difference]: Without dead ends: 4546 [2020-09-15 13:16:50,534 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2020-09-15 13:16:50,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4546 states. [2020-09-15 13:16:50,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4546 to 2157. [2020-09-15 13:16:50,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2157 states. [2020-09-15 13:16:50,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2157 states to 2157 states and 8278 transitions. [2020-09-15 13:16:50,652 INFO L78 Accepts]: Start accepts. Automaton has 2157 states and 8278 transitions. Word has length 15 [2020-09-15 13:16:50,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:16:50,652 INFO L479 AbstractCegarLoop]: Abstraction has 2157 states and 8278 transitions. [2020-09-15 13:16:50,652 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-15 13:16:50,653 INFO L276 IsEmpty]: Start isEmpty. Operand 2157 states and 8278 transitions. [2020-09-15 13:16:50,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-15 13:16:50,653 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:16:50,653 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:16:50,867 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-09-15 13:16:50,868 INFO L427 AbstractCegarLoop]: === Iteration 5 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-09-15 13:16:50,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:16:50,868 INFO L82 PathProgramCache]: Analyzing trace with hash -1474969304, now seen corresponding path program 2 times [2020-09-15 13:16:50,869 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:16:50,869 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952793019] [2020-09-15 13:16:50,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:16:50,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:16:50,948 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-15 13:16:50,949 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952793019] [2020-09-15 13:16:50,949 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 13:16:50,949 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-15 13:16:50,949 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630153455] [2020-09-15 13:16:50,950 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-15 13:16:50,950 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:16:50,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-15 13:16:50,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-15 13:16:50,951 INFO L87 Difference]: Start difference. First operand 2157 states and 8278 transitions. Second operand 7 states. [2020-09-15 13:16:51,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:16:51,290 INFO L93 Difference]: Finished difference Result 4612 states and 15111 transitions. [2020-09-15 13:16:51,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-15 13:16:51,291 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-09-15 13:16:51,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:16:51,309 INFO L225 Difference]: With dead ends: 4612 [2020-09-15 13:16:51,309 INFO L226 Difference]: Without dead ends: 4601 [2020-09-15 13:16:51,309 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-09-15 13:16:51,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4601 states. [2020-09-15 13:16:51,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4601 to 2035. [2020-09-15 13:16:51,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2035 states. [2020-09-15 13:16:51,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2035 states to 2035 states and 7845 transitions. [2020-09-15 13:16:51,422 INFO L78 Accepts]: Start accepts. Automaton has 2035 states and 7845 transitions. Word has length 15 [2020-09-15 13:16:51,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:16:51,422 INFO L479 AbstractCegarLoop]: Abstraction has 2035 states and 7845 transitions. [2020-09-15 13:16:51,422 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-15 13:16:51,422 INFO L276 IsEmpty]: Start isEmpty. Operand 2035 states and 7845 transitions. [2020-09-15 13:16:51,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-15 13:16:51,423 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:16:51,423 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:16:51,423 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-09-15 13:16:51,424 INFO L427 AbstractCegarLoop]: === Iteration 6 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-09-15 13:16:51,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:16:51,424 INFO L82 PathProgramCache]: Analyzing trace with hash -1278978660, now seen corresponding path program 1 times [2020-09-15 13:16:51,424 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:16:51,425 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44213966] [2020-09-15 13:16:51,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:16:51,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:16:51,490 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-09-15 13:16:51,491 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44213966] [2020-09-15 13:16:51,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 13:16:51,491 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-15 13:16:51,491 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304274199] [2020-09-15 13:16:51,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-15 13:16:51,492 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:16:51,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-15 13:16:51,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-15 13:16:51,492 INFO L87 Difference]: Start difference. First operand 2035 states and 7845 transitions. Second operand 5 states. [2020-09-15 13:16:51,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:16:51,622 INFO L93 Difference]: Finished difference Result 3265 states and 11681 transitions. [2020-09-15 13:16:51,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-15 13:16:51,622 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-09-15 13:16:51,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:16:51,637 INFO L225 Difference]: With dead ends: 3265 [2020-09-15 13:16:51,637 INFO L226 Difference]: Without dead ends: 3250 [2020-09-15 13:16:51,638 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-15 13:16:51,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3250 states. [2020-09-15 13:16:51,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3250 to 2281. [2020-09-15 13:16:51,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2281 states. [2020-09-15 13:16:51,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2281 states to 2281 states and 8755 transitions. [2020-09-15 13:16:51,777 INFO L78 Accepts]: Start accepts. Automaton has 2281 states and 8755 transitions. Word has length 17 [2020-09-15 13:16:51,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:16:51,777 INFO L479 AbstractCegarLoop]: Abstraction has 2281 states and 8755 transitions. [2020-09-15 13:16:51,777 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-15 13:16:51,777 INFO L276 IsEmpty]: Start isEmpty. Operand 2281 states and 8755 transitions. [2020-09-15 13:16:51,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-15 13:16:51,779 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:16:51,779 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:16:51,779 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-09-15 13:16:51,779 INFO L427 AbstractCegarLoop]: === Iteration 7 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-09-15 13:16:51,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:16:51,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1455436228, now seen corresponding path program 1 times [2020-09-15 13:16:51,780 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:16:51,780 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287514661] [2020-09-15 13:16:51,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:16:51,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:16:51,861 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-15 13:16:51,861 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287514661] [2020-09-15 13:16:51,862 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55419908] [2020-09-15 13:16:51,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:16:51,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:16:51,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-15 13:16:51,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:16:52,035 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-15 13:16:52,036 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:16:52,036 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-09-15 13:16:52,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927597481] [2020-09-15 13:16:52,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-15 13:16:52,037 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:16:52,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-15 13:16:52,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-09-15 13:16:52,038 INFO L87 Difference]: Start difference. First operand 2281 states and 8755 transitions. Second operand 12 states. [2020-09-15 13:16:52,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:16:52,469 INFO L93 Difference]: Finished difference Result 4825 states and 15986 transitions. [2020-09-15 13:16:52,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-15 13:16:52,470 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 19 [2020-09-15 13:16:52,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:16:52,485 INFO L225 Difference]: With dead ends: 4825 [2020-09-15 13:16:52,485 INFO L226 Difference]: Without dead ends: 4813 [2020-09-15 13:16:52,486 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2020-09-15 13:16:52,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4813 states. [2020-09-15 13:16:52,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4813 to 2305. [2020-09-15 13:16:52,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2305 states. [2020-09-15 13:16:52,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2305 states to 2305 states and 8815 transitions. [2020-09-15 13:16:52,617 INFO L78 Accepts]: Start accepts. Automaton has 2305 states and 8815 transitions. Word has length 19 [2020-09-15 13:16:52,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:16:52,617 INFO L479 AbstractCegarLoop]: Abstraction has 2305 states and 8815 transitions. [2020-09-15 13:16:52,618 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-15 13:16:52,618 INFO L276 IsEmpty]: Start isEmpty. Operand 2305 states and 8815 transitions. [2020-09-15 13:16:52,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-15 13:16:52,620 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:16:52,620 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:16:52,833 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:16:52,833 INFO L427 AbstractCegarLoop]: === Iteration 8 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-09-15 13:16:52,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:16:52,834 INFO L82 PathProgramCache]: Analyzing trace with hash -979473248, now seen corresponding path program 1 times [2020-09-15 13:16:52,834 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:16:52,834 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585900883] [2020-09-15 13:16:52,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:16:52,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:16:52,921 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-15 13:16:52,921 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585900883] [2020-09-15 13:16:52,921 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353641836] [2020-09-15 13:16:52,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:16:52,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:16:52,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-15 13:16:52,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:16:53,072 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-15 13:16:53,073 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:16:53,073 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-09-15 13:16:53,073 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734990740] [2020-09-15 13:16:53,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-15 13:16:53,074 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:16:53,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-15 13:16:53,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-09-15 13:16:53,074 INFO L87 Difference]: Start difference. First operand 2305 states and 8815 transitions. Second operand 12 states. [2020-09-15 13:16:53,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:16:53,582 INFO L93 Difference]: Finished difference Result 4942 states and 16410 transitions. [2020-09-15 13:16:53,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-15 13:16:53,583 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 19 [2020-09-15 13:16:53,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:16:53,598 INFO L225 Difference]: With dead ends: 4942 [2020-09-15 13:16:53,598 INFO L226 Difference]: Without dead ends: 4925 [2020-09-15 13:16:53,599 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2020-09-15 13:16:53,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4925 states. [2020-09-15 13:16:53,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4925 to 2299. [2020-09-15 13:16:53,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2299 states. [2020-09-15 13:16:53,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2299 states to 2299 states and 8782 transitions. [2020-09-15 13:16:53,729 INFO L78 Accepts]: Start accepts. Automaton has 2299 states and 8782 transitions. Word has length 19 [2020-09-15 13:16:53,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:16:53,729 INFO L479 AbstractCegarLoop]: Abstraction has 2299 states and 8782 transitions. [2020-09-15 13:16:53,729 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-15 13:16:53,729 INFO L276 IsEmpty]: Start isEmpty. Operand 2299 states and 8782 transitions. [2020-09-15 13:16:53,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-15 13:16:53,731 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:16:53,731 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:16:53,944 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:16:53,944 INFO L427 AbstractCegarLoop]: === Iteration 9 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-09-15 13:16:53,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:16:53,945 INFO L82 PathProgramCache]: Analyzing trace with hash -737855584, now seen corresponding path program 2 times [2020-09-15 13:16:53,945 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:16:53,945 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095106228] [2020-09-15 13:16:53,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:16:53,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:16:54,031 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-09-15 13:16:54,032 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095106228] [2020-09-15 13:16:54,032 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 13:16:54,032 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-15 13:16:54,032 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848423488] [2020-09-15 13:16:54,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-15 13:16:54,033 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:16:54,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-15 13:16:54,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-15 13:16:54,034 INFO L87 Difference]: Start difference. First operand 2299 states and 8782 transitions. Second operand 7 states. [2020-09-15 13:16:54,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:16:54,345 INFO L93 Difference]: Finished difference Result 4934 states and 16393 transitions. [2020-09-15 13:16:54,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-15 13:16:54,346 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-09-15 13:16:54,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:16:54,357 INFO L225 Difference]: With dead ends: 4934 [2020-09-15 13:16:54,357 INFO L226 Difference]: Without dead ends: 4917 [2020-09-15 13:16:54,357 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-09-15 13:16:54,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4917 states. [2020-09-15 13:16:54,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4917 to 2216. [2020-09-15 13:16:54,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2216 states. [2020-09-15 13:16:54,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2216 states to 2216 states and 8477 transitions. [2020-09-15 13:16:54,455 INFO L78 Accepts]: Start accepts. Automaton has 2216 states and 8477 transitions. Word has length 19 [2020-09-15 13:16:54,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:16:54,456 INFO L479 AbstractCegarLoop]: Abstraction has 2216 states and 8477 transitions. [2020-09-15 13:16:54,456 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-15 13:16:54,456 INFO L276 IsEmpty]: Start isEmpty. Operand 2216 states and 8477 transitions. [2020-09-15 13:16:54,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-15 13:16:54,457 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:16:54,458 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:16:54,458 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-09-15 13:16:54,458 INFO L427 AbstractCegarLoop]: === Iteration 10 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-09-15 13:16:54,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:16:54,458 INFO L82 PathProgramCache]: Analyzing trace with hash -737840828, now seen corresponding path program 2 times [2020-09-15 13:16:54,459 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:16:54,459 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452390674] [2020-09-15 13:16:54,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:16:54,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:16:54,544 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-09-15 13:16:54,544 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452390674] [2020-09-15 13:16:54,545 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 13:16:54,545 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-15 13:16:54,545 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550847378] [2020-09-15 13:16:54,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-15 13:16:54,546 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:16:54,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-15 13:16:54,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-15 13:16:54,546 INFO L87 Difference]: Start difference. First operand 2216 states and 8477 transitions. Second operand 7 states. [2020-09-15 13:16:54,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:16:54,929 INFO L93 Difference]: Finished difference Result 4774 states and 15828 transitions. [2020-09-15 13:16:54,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-15 13:16:54,929 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-09-15 13:16:54,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:16:54,942 INFO L225 Difference]: With dead ends: 4774 [2020-09-15 13:16:54,942 INFO L226 Difference]: Without dead ends: 4757 [2020-09-15 13:16:54,943 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-09-15 13:16:54,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4757 states. [2020-09-15 13:16:55,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4757 to 2150. [2020-09-15 13:16:55,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2150 states. [2020-09-15 13:16:55,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2150 states to 2150 states and 8243 transitions. [2020-09-15 13:16:55,073 INFO L78 Accepts]: Start accepts. Automaton has 2150 states and 8243 transitions. Word has length 19 [2020-09-15 13:16:55,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:16:55,073 INFO L479 AbstractCegarLoop]: Abstraction has 2150 states and 8243 transitions. [2020-09-15 13:16:55,073 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-15 13:16:55,074 INFO L276 IsEmpty]: Start isEmpty. Operand 2150 states and 8243 transitions. [2020-09-15 13:16:55,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-15 13:16:55,075 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:16:55,075 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:16:55,076 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-09-15 13:16:55,076 INFO L427 AbstractCegarLoop]: === Iteration 11 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-09-15 13:16:55,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:16:55,076 INFO L82 PathProgramCache]: Analyzing trace with hash -1726751032, now seen corresponding path program 1 times [2020-09-15 13:16:55,077 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:16:55,077 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022058372] [2020-09-15 13:16:55,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:16:55,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:16:55,183 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:16:55,183 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022058372] [2020-09-15 13:16:55,183 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389541578] [2020-09-15 13:16:55,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:16:55,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:16:55,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 13:16:55,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:16:55,395 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:16:55,395 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:16:55,395 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-09-15 13:16:55,396 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277108826] [2020-09-15 13:16:55,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-15 13:16:55,397 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:16:55,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-15 13:16:55,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-09-15 13:16:55,398 INFO L87 Difference]: Start difference. First operand 2150 states and 8243 transitions. Second operand 16 states. [2020-09-15 13:16:56,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:16:56,421 INFO L93 Difference]: Finished difference Result 6025 states and 18746 transitions. [2020-09-15 13:16:56,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 13:16:56,421 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 21 [2020-09-15 13:16:56,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:16:56,435 INFO L225 Difference]: With dead ends: 6025 [2020-09-15 13:16:56,435 INFO L226 Difference]: Without dead ends: 6017 [2020-09-15 13:16:56,436 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=397, Invalid=1085, Unknown=0, NotChecked=0, Total=1482 [2020-09-15 13:16:56,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6017 states. [2020-09-15 13:16:56,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6017 to 2117. [2020-09-15 13:16:56,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2117 states. [2020-09-15 13:16:56,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2117 states to 2117 states and 8106 transitions. [2020-09-15 13:16:56,519 INFO L78 Accepts]: Start accepts. Automaton has 2117 states and 8106 transitions. Word has length 21 [2020-09-15 13:16:56,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:16:56,519 INFO L479 AbstractCegarLoop]: Abstraction has 2117 states and 8106 transitions. [2020-09-15 13:16:56,519 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-15 13:16:56,520 INFO L276 IsEmpty]: Start isEmpty. Operand 2117 states and 8106 transitions. [2020-09-15 13:16:56,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-15 13:16:56,521 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:16:56,522 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:16:56,728 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-09-15 13:16:56,729 INFO L427 AbstractCegarLoop]: === Iteration 12 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-09-15 13:16:56,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:16:56,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1485133368, now seen corresponding path program 2 times [2020-09-15 13:16:56,730 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:16:56,730 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238889822] [2020-09-15 13:16:56,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:16:56,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:16:56,856 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-15 13:16:56,857 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238889822] [2020-09-15 13:16:56,857 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145481363] [2020-09-15 13:16:56,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:16:56,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 13:16:56,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:16:56,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 13:16:56,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:16:57,077 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-15 13:16:57,078 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:16:57,078 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-09-15 13:16:57,078 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937588265] [2020-09-15 13:16:57,079 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-15 13:16:57,079 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:16:57,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-15 13:16:57,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-09-15 13:16:57,083 INFO L87 Difference]: Start difference. First operand 2117 states and 8106 transitions. Second operand 16 states. [2020-09-15 13:16:58,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:16:58,125 INFO L93 Difference]: Finished difference Result 5914 states and 18384 transitions. [2020-09-15 13:16:58,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 13:16:58,125 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 21 [2020-09-15 13:16:58,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:16:58,138 INFO L225 Difference]: With dead ends: 5914 [2020-09-15 13:16:58,139 INFO L226 Difference]: Without dead ends: 5903 [2020-09-15 13:16:58,140 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=397, Invalid=1085, Unknown=0, NotChecked=0, Total=1482 [2020-09-15 13:16:58,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5903 states. [2020-09-15 13:16:58,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5903 to 2085. [2020-09-15 13:16:58,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2085 states. [2020-09-15 13:16:58,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2085 states to 2085 states and 7975 transitions. [2020-09-15 13:16:58,241 INFO L78 Accepts]: Start accepts. Automaton has 2085 states and 7975 transitions. Word has length 21 [2020-09-15 13:16:58,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:16:58,242 INFO L479 AbstractCegarLoop]: Abstraction has 2085 states and 7975 transitions. [2020-09-15 13:16:58,242 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-15 13:16:58,242 INFO L276 IsEmpty]: Start isEmpty. Operand 2085 states and 7975 transitions. [2020-09-15 13:16:58,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-15 13:16:58,243 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:16:58,243 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:16:58,455 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:16:58,456 INFO L427 AbstractCegarLoop]: === Iteration 13 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-09-15 13:16:58,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:16:58,456 INFO L82 PathProgramCache]: Analyzing trace with hash -268549816, now seen corresponding path program 3 times [2020-09-15 13:16:58,457 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:16:58,457 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313211966] [2020-09-15 13:16:58,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:16:58,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:16:58,591 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-15 13:16:58,591 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313211966] [2020-09-15 13:16:58,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28557122] [2020-09-15 13:16:58,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:16:58,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-15 13:16:58,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:16:58,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 13:16:58,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:16:58,789 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-15 13:16:58,790 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:16:58,790 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-09-15 13:16:58,790 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660679742] [2020-09-15 13:16:58,791 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-15 13:16:58,791 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:16:58,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-15 13:16:58,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-09-15 13:16:58,791 INFO L87 Difference]: Start difference. First operand 2085 states and 7975 transitions. Second operand 16 states. [2020-09-15 13:16:59,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:16:59,828 INFO L93 Difference]: Finished difference Result 5907 states and 18375 transitions. [2020-09-15 13:16:59,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 13:16:59,829 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 21 [2020-09-15 13:16:59,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:16:59,839 INFO L225 Difference]: With dead ends: 5907 [2020-09-15 13:16:59,839 INFO L226 Difference]: Without dead ends: 5899 [2020-09-15 13:16:59,840 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=397, Invalid=1085, Unknown=0, NotChecked=0, Total=1482 [2020-09-15 13:16:59,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5899 states. [2020-09-15 13:16:59,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5899 to 2008. [2020-09-15 13:16:59,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2008 states. [2020-09-15 13:16:59,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2008 states to 2008 states and 7698 transitions. [2020-09-15 13:16:59,936 INFO L78 Accepts]: Start accepts. Automaton has 2008 states and 7698 transitions. Word has length 21 [2020-09-15 13:16:59,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:16:59,936 INFO L479 AbstractCegarLoop]: Abstraction has 2008 states and 7698 transitions. [2020-09-15 13:16:59,937 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-15 13:16:59,937 INFO L276 IsEmpty]: Start isEmpty. Operand 2008 states and 7698 transitions. [2020-09-15 13:16:59,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-15 13:16:59,939 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:16:59,939 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:17:00,152 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-09-15 13:17:00,153 INFO L427 AbstractCegarLoop]: === Iteration 14 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-09-15 13:17:00,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:17:00,153 INFO L82 PathProgramCache]: Analyzing trace with hash -675948728, now seen corresponding path program 4 times [2020-09-15 13:17:00,153 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:17:00,154 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150114969] [2020-09-15 13:17:00,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:17:00,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:17:00,258 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-15 13:17:00,258 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150114969] [2020-09-15 13:17:00,258 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174943477] [2020-09-15 13:17:00,259 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:17:00,326 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 13:17:00,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:17:00,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 13:17:00,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:17:00,478 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-15 13:17:00,479 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:17:00,479 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-09-15 13:17:00,480 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558406635] [2020-09-15 13:17:00,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-15 13:17:00,480 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:17:00,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-15 13:17:00,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-09-15 13:17:00,481 INFO L87 Difference]: Start difference. First operand 2008 states and 7698 transitions. Second operand 16 states. [2020-09-15 13:17:01,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:17:01,498 INFO L93 Difference]: Finished difference Result 5835 states and 18155 transitions. [2020-09-15 13:17:01,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 13:17:01,498 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 21 [2020-09-15 13:17:01,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:17:01,509 INFO L225 Difference]: With dead ends: 5835 [2020-09-15 13:17:01,509 INFO L226 Difference]: Without dead ends: 5824 [2020-09-15 13:17:01,510 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=397, Invalid=1085, Unknown=0, NotChecked=0, Total=1482 [2020-09-15 13:17:01,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5824 states. [2020-09-15 13:17:01,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5824 to 1976. [2020-09-15 13:17:01,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1976 states. [2020-09-15 13:17:01,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1976 states to 1976 states and 7567 transitions. [2020-09-15 13:17:01,610 INFO L78 Accepts]: Start accepts. Automaton has 1976 states and 7567 transitions. Word has length 21 [2020-09-15 13:17:01,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:17:01,610 INFO L479 AbstractCegarLoop]: Abstraction has 1976 states and 7567 transitions. [2020-09-15 13:17:01,611 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-15 13:17:01,611 INFO L276 IsEmpty]: Start isEmpty. Operand 1976 states and 7567 transitions. [2020-09-15 13:17:01,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-15 13:17:01,613 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:17:01,613 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:17:01,828 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-09-15 13:17:01,828 INFO L427 AbstractCegarLoop]: === Iteration 15 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-09-15 13:17:01,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:17:01,829 INFO L82 PathProgramCache]: Analyzing trace with hash -409607608, now seen corresponding path program 5 times [2020-09-15 13:17:01,829 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:17:01,829 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829407061] [2020-09-15 13:17:01,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:17:01,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:17:01,976 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-09-15 13:17:01,976 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829407061] [2020-09-15 13:17:01,976 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 13:17:01,977 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-15 13:17:01,977 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254100464] [2020-09-15 13:17:01,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-15 13:17:01,977 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:17:01,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-15 13:17:01,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-09-15 13:17:01,978 INFO L87 Difference]: Start difference. First operand 1976 states and 7567 transitions. Second operand 9 states. [2020-09-15 13:17:02,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:17:02,834 INFO L93 Difference]: Finished difference Result 5820 states and 18126 transitions. [2020-09-15 13:17:02,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 13:17:02,834 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2020-09-15 13:17:02,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:17:02,846 INFO L225 Difference]: With dead ends: 5820 [2020-09-15 13:17:02,846 INFO L226 Difference]: Without dead ends: 5812 [2020-09-15 13:17:02,847 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=264, Invalid=728, Unknown=0, NotChecked=0, Total=992 [2020-09-15 13:17:02,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5812 states. [2020-09-15 13:17:02,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5812 to 1907. [2020-09-15 13:17:02,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1907 states. [2020-09-15 13:17:02,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1907 states to 1907 states and 7310 transitions. [2020-09-15 13:17:02,914 INFO L78 Accepts]: Start accepts. Automaton has 1907 states and 7310 transitions. Word has length 21 [2020-09-15 13:17:02,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:17:02,914 INFO L479 AbstractCegarLoop]: Abstraction has 1907 states and 7310 transitions. [2020-09-15 13:17:02,914 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-15 13:17:02,915 INFO L276 IsEmpty]: Start isEmpty. Operand 1907 states and 7310 transitions. [2020-09-15 13:17:02,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-15 13:17:02,916 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:17:02,917 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:17:02,917 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-09-15 13:17:02,917 INFO L427 AbstractCegarLoop]: === Iteration 16 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-09-15 13:17:02,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:17:02,917 INFO L82 PathProgramCache]: Analyzing trace with hash -395441848, now seen corresponding path program 6 times [2020-09-15 13:17:02,917 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:17:02,918 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674873119] [2020-09-15 13:17:02,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:17:02,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:17:03,035 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-09-15 13:17:03,036 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674873119] [2020-09-15 13:17:03,036 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 13:17:03,036 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-15 13:17:03,036 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99801797] [2020-09-15 13:17:03,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-15 13:17:03,037 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:17:03,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-15 13:17:03,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-09-15 13:17:03,037 INFO L87 Difference]: Start difference. First operand 1907 states and 7310 transitions. Second operand 9 states. [2020-09-15 13:17:03,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:17:03,888 INFO L93 Difference]: Finished difference Result 5717 states and 17784 transitions. [2020-09-15 13:17:03,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 13:17:03,888 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2020-09-15 13:17:03,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:17:03,898 INFO L225 Difference]: With dead ends: 5717 [2020-09-15 13:17:03,899 INFO L226 Difference]: Without dead ends: 5705 [2020-09-15 13:17:03,900 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=264, Invalid=728, Unknown=0, NotChecked=0, Total=992 [2020-09-15 13:17:03,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5705 states. [2020-09-15 13:17:03,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5705 to 1800. [2020-09-15 13:17:03,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1800 states. [2020-09-15 13:17:03,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1800 states to 1800 states and 6961 transitions. [2020-09-15 13:17:03,990 INFO L78 Accepts]: Start accepts. Automaton has 1800 states and 6961 transitions. Word has length 21 [2020-09-15 13:17:03,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:17:03,991 INFO L479 AbstractCegarLoop]: Abstraction has 1800 states and 6961 transitions. [2020-09-15 13:17:03,991 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-15 13:17:03,991 INFO L276 IsEmpty]: Start isEmpty. Operand 1800 states and 6961 transitions. [2020-09-15 13:17:03,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-15 13:17:03,993 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:17:03,993 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:17:03,993 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-09-15 13:17:03,994 INFO L427 AbstractCegarLoop]: === Iteration 17 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-09-15 13:17:03,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:17:03,994 INFO L82 PathProgramCache]: Analyzing trace with hash -334654421, now seen corresponding path program 1 times [2020-09-15 13:17:03,994 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:17:03,994 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499206074] [2020-09-15 13:17:03,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:17:04,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:17:04,104 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-09-15 13:17:04,105 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499206074] [2020-09-15 13:17:04,105 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 13:17:04,105 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-15 13:17:04,105 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783000801] [2020-09-15 13:17:04,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-15 13:17:04,106 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:17:04,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-15 13:17:04,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-15 13:17:04,107 INFO L87 Difference]: Start difference. First operand 1800 states and 6961 transitions. Second operand 5 states. [2020-09-15 13:17:04,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:17:04,221 INFO L93 Difference]: Finished difference Result 2762 states and 9976 transitions. [2020-09-15 13:17:04,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-15 13:17:04,222 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-09-15 13:17:04,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:17:04,228 INFO L225 Difference]: With dead ends: 2762 [2020-09-15 13:17:04,228 INFO L226 Difference]: Without dead ends: 2746 [2020-09-15 13:17:04,228 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-15 13:17:04,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2746 states. [2020-09-15 13:17:04,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2746 to 1965. [2020-09-15 13:17:04,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1965 states. [2020-09-15 13:17:04,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1965 states to 1965 states and 7429 transitions. [2020-09-15 13:17:04,297 INFO L78 Accepts]: Start accepts. Automaton has 1965 states and 7429 transitions. Word has length 21 [2020-09-15 13:17:04,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:17:04,298 INFO L479 AbstractCegarLoop]: Abstraction has 1965 states and 7429 transitions. [2020-09-15 13:17:04,298 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-15 13:17:04,298 INFO L276 IsEmpty]: Start isEmpty. Operand 1965 states and 7429 transitions. [2020-09-15 13:17:04,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-15 13:17:04,300 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:17:04,300 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:17:04,301 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-09-15 13:17:04,301 INFO L427 AbstractCegarLoop]: === Iteration 18 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-09-15 13:17:04,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:17:04,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1788555247, now seen corresponding path program 1 times [2020-09-15 13:17:04,302 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:17:04,302 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295616616] [2020-09-15 13:17:04,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:17:04,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-15 13:17:04,316 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-15 13:17:04,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-15 13:17:04,329 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-15 13:17:04,338 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-09-15 13:17:04,338 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-15 13:17:04,339 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-09-15 13:17:04,339 WARN L633 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-09-15 13:17:04,340 WARN L363 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2020-09-15 13:17:04,340 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2020-09-15 13:17:04,355 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread4of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,355 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread4of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,355 WARN L313 ript$VariableManager]: TermVariabe thr2Thread4of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,355 WARN L313 ript$VariableManager]: TermVariabe thr2Thread4of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,356 WARN L313 ript$VariableManager]: TermVariabe thr2Thread4of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,356 WARN L313 ript$VariableManager]: TermVariabe thr2Thread4of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,356 WARN L313 ript$VariableManager]: TermVariabe thr2Thread4of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,356 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread5of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,356 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread5of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,356 WARN L313 ript$VariableManager]: TermVariabe thr2Thread5of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,357 WARN L313 ript$VariableManager]: TermVariabe thr2Thread5of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,357 WARN L313 ript$VariableManager]: TermVariabe thr2Thread5of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,357 WARN L313 ript$VariableManager]: TermVariabe thr2Thread5of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,357 WARN L313 ript$VariableManager]: TermVariabe thr2Thread5of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,357 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread3of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,358 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread3of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,358 WARN L313 ript$VariableManager]: TermVariabe thr2Thread3of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,358 WARN L313 ript$VariableManager]: TermVariabe thr2Thread3of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,358 WARN L313 ript$VariableManager]: TermVariabe thr2Thread3of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,358 WARN L313 ript$VariableManager]: TermVariabe thr2Thread3of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,358 WARN L313 ript$VariableManager]: TermVariabe thr2Thread3of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,359 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread2of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,359 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread2of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,359 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,359 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,359 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,360 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,360 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,360 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,360 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,360 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,360 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,361 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,361 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,361 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,361 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of5ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,361 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of5ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,361 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of5ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,362 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of5ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,362 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of5ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,362 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of5ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,362 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of5ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,362 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of5ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,362 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of5ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,363 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of5ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,363 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread5of5ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,363 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread5of5ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,363 WARN L313 ript$VariableManager]: TermVariabe thr1Thread5of5ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,363 WARN L313 ript$VariableManager]: TermVariabe thr1Thread5of5ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,364 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread5of5ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,364 WARN L313 ript$VariableManager]: TermVariabe thr1Thread5of5ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,364 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread5of5ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,364 WARN L313 ript$VariableManager]: TermVariabe thr1Thread5of5ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,364 WARN L313 ript$VariableManager]: TermVariabe thr1Thread5of5ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,364 WARN L313 ript$VariableManager]: TermVariabe thr1Thread5of5ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,365 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of5ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,365 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of5ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,365 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of5ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,365 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of5ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,365 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of5ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,365 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of5ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,366 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of5ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,366 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of5ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,366 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of5ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,366 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of5ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,366 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread3of5ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,366 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread3of5ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,367 WARN L313 ript$VariableManager]: TermVariabe thr1Thread3of5ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,367 WARN L313 ript$VariableManager]: TermVariabe thr1Thread3of5ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,367 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread3of5ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,367 WARN L313 ript$VariableManager]: TermVariabe thr1Thread3of5ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,367 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread3of5ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,367 WARN L313 ript$VariableManager]: TermVariabe thr1Thread3of5ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,368 WARN L313 ript$VariableManager]: TermVariabe thr1Thread3of5ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,368 WARN L313 ript$VariableManager]: TermVariabe thr1Thread3of5ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,368 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread4of5ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,368 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread4of5ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,368 WARN L313 ript$VariableManager]: TermVariabe thr1Thread4of5ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,368 WARN L313 ript$VariableManager]: TermVariabe thr1Thread4of5ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,369 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread4of5ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,369 WARN L313 ript$VariableManager]: TermVariabe thr1Thread4of5ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,369 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread4of5ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,369 WARN L313 ript$VariableManager]: TermVariabe thr1Thread4of5ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,369 WARN L313 ript$VariableManager]: TermVariabe thr1Thread4of5ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,369 WARN L313 ript$VariableManager]: TermVariabe thr1Thread4of5ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,370 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,370 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,370 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,371 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,371 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,374 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,374 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread2of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,375 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,375 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread2of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,375 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,376 WARN L313 ript$VariableManager]: TermVariabe thr2Thread3of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,377 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread3of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,377 WARN L313 ript$VariableManager]: TermVariabe thr2Thread3of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,377 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread3of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,377 WARN L313 ript$VariableManager]: TermVariabe thr2Thread3of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,378 WARN L313 ript$VariableManager]: TermVariabe thr2Thread4of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,379 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread4of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,379 WARN L313 ript$VariableManager]: TermVariabe thr2Thread4of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,379 WARN L313 ript$VariableManager]: TermVariabe thr2Thread4of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,379 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread4of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,381 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread5of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,381 WARN L313 ript$VariableManager]: TermVariabe thr2Thread5of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,381 WARN L313 ript$VariableManager]: TermVariabe thr2Thread5of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,381 WARN L313 ript$VariableManager]: TermVariabe thr2Thread5of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,381 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread5of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,383 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of5ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,383 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of5ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,383 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of5ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,384 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of5ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,384 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of5ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,384 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of5ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,385 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of5ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,386 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of5ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,386 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of5ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,386 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of5ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,386 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of5ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,386 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of5ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,388 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread3of5ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,388 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread3of5ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,389 WARN L313 ript$VariableManager]: TermVariabe thr1Thread3of5ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,389 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread3of5ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,389 WARN L313 ript$VariableManager]: TermVariabe thr1Thread3of5ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,389 WARN L313 ript$VariableManager]: TermVariabe thr1Thread3of5ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,391 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread4of5ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,391 WARN L313 ript$VariableManager]: TermVariabe thr1Thread4of5ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,391 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread4of5ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,391 WARN L313 ript$VariableManager]: TermVariabe thr1Thread4of5ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,391 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread4of5ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,392 WARN L313 ript$VariableManager]: TermVariabe thr1Thread4of5ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,393 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread5of5ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,393 WARN L313 ript$VariableManager]: TermVariabe thr1Thread5of5ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,394 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread5of5ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,394 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread5of5ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,394 WARN L313 ript$VariableManager]: TermVariabe thr1Thread5of5ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,394 WARN L313 ript$VariableManager]: TermVariabe thr1Thread5of5ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:17:04,396 INFO L251 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2020-09-15 13:17:04,396 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-15 13:17:04,396 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-15 13:17:04,397 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-15 13:17:04,397 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-15 13:17:04,397 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-15 13:17:04,397 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-15 13:17:04,397 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-15 13:17:04,397 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-15 13:17:04,399 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 137 places, 122 transitions, 334 flow [2020-09-15 13:17:04,400 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 137 places, 122 transitions, 334 flow [2020-09-15 13:17:04,418 INFO L129 PetriNetUnfolder]: 8/152 cut-off events. [2020-09-15 13:17:04,418 INFO L130 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2020-09-15 13:17:04,420 INFO L80 FinitePrefix]: Finished finitePrefix Result has 190 conditions, 152 events. 8/152 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 251 event pairs, 0 based on Foata normal form. 0/137 useless extension candidates. Maximal degree in co-relation 179. Up to 12 conditions per place. [2020-09-15 13:17:04,424 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 137 places, 122 transitions, 334 flow [2020-09-15 13:17:04,444 INFO L129 PetriNetUnfolder]: 8/152 cut-off events. [2020-09-15 13:17:04,444 INFO L130 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2020-09-15 13:17:04,446 INFO L80 FinitePrefix]: Finished finitePrefix Result has 190 conditions, 152 events. 8/152 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 251 event pairs, 0 based on Foata normal form. 0/137 useless extension candidates. Maximal degree in co-relation 179. Up to 12 conditions per place. [2020-09-15 13:17:04,451 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 2264 [2020-09-15 13:17:04,452 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-09-15 13:17:06,217 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-09-15 13:17:06,327 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-09-15 13:17:06,649 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 58 [2020-09-15 13:17:06,937 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 71 [2020-09-15 13:17:07,033 INFO L206 etLargeBlockEncoding]: Checked pairs total: 2999 [2020-09-15 13:17:07,034 INFO L214 etLargeBlockEncoding]: Total number of compositions: 104 [2020-09-15 13:17:07,034 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 61 places, 39 transitions, 168 flow [2020-09-15 13:17:07,648 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 6191 states. [2020-09-15 13:17:07,649 INFO L276 IsEmpty]: Start isEmpty. Operand 6191 states. [2020-09-15 13:17:07,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-09-15 13:17:07,649 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:17:07,649 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-09-15 13:17:07,649 INFO L427 AbstractCegarLoop]: === Iteration 1 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:17:07,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:17:07,650 INFO L82 PathProgramCache]: Analyzing trace with hash 1026170, now seen corresponding path program 1 times [2020-09-15 13:17:07,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:17:07,650 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842998282] [2020-09-15 13:17:07,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:17:07,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:17:07,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:17:07,680 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842998282] [2020-09-15 13:17:07,681 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 13:17:07,681 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-09-15 13:17:07,681 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922373393] [2020-09-15 13:17:07,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-15 13:17:07,681 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:17:07,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-15 13:17:07,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-15 13:17:07,682 INFO L87 Difference]: Start difference. First operand 6191 states. Second operand 3 states. [2020-09-15 13:17:07,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:17:07,748 INFO L93 Difference]: Finished difference Result 5844 states and 26316 transitions. [2020-09-15 13:17:07,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-15 13:17:07,748 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-09-15 13:17:07,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:17:07,764 INFO L225 Difference]: With dead ends: 5844 [2020-09-15 13:17:07,764 INFO L226 Difference]: Without dead ends: 5479 [2020-09-15 13:17:07,766 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-15 13:17:07,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5479 states. [2020-09-15 13:17:07,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5479 to 5479. [2020-09-15 13:17:07,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5479 states. [2020-09-15 13:17:07,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5479 states to 5479 states and 24493 transitions. [2020-09-15 13:17:07,928 INFO L78 Accepts]: Start accepts. Automaton has 5479 states and 24493 transitions. Word has length 3 [2020-09-15 13:17:07,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:17:07,928 INFO L479 AbstractCegarLoop]: Abstraction has 5479 states and 24493 transitions. [2020-09-15 13:17:07,928 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-15 13:17:07,929 INFO L276 IsEmpty]: Start isEmpty. Operand 5479 states and 24493 transitions. [2020-09-15 13:17:07,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-09-15 13:17:07,929 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:17:07,929 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:17:07,929 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-09-15 13:17:07,929 INFO L427 AbstractCegarLoop]: === Iteration 2 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:17:07,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:17:07,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1344335463, now seen corresponding path program 1 times [2020-09-15 13:17:07,930 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:17:07,930 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857870496] [2020-09-15 13:17:07,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:17:07,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:17:07,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:17:07,981 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857870496] [2020-09-15 13:17:07,981 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 13:17:07,981 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-15 13:17:07,981 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033534529] [2020-09-15 13:17:07,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-15 13:17:07,982 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:17:07,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-15 13:17:07,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-15 13:17:07,982 INFO L87 Difference]: Start difference. First operand 5479 states and 24493 transitions. Second operand 5 states. [2020-09-15 13:17:08,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:17:08,147 INFO L93 Difference]: Finished difference Result 9673 states and 40333 transitions. [2020-09-15 13:17:08,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-15 13:17:08,148 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2020-09-15 13:17:08,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:17:08,170 INFO L225 Difference]: With dead ends: 9673 [2020-09-15 13:17:08,171 INFO L226 Difference]: Without dead ends: 9666 [2020-09-15 13:17:08,171 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-15 13:17:08,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9666 states. [2020-09-15 13:17:08,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9666 to 6331. [2020-09-15 13:17:08,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6331 states. [2020-09-15 13:17:08,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6331 states to 6331 states and 28544 transitions. [2020-09-15 13:17:08,509 INFO L78 Accepts]: Start accepts. Automaton has 6331 states and 28544 transitions. Word has length 9 [2020-09-15 13:17:08,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:17:08,509 INFO L479 AbstractCegarLoop]: Abstraction has 6331 states and 28544 transitions. [2020-09-15 13:17:08,509 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-15 13:17:08,509 INFO L276 IsEmpty]: Start isEmpty. Operand 6331 states and 28544 transitions. [2020-09-15 13:17:08,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 13:17:08,510 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:17:08,510 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:17:08,510 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-09-15 13:17:08,510 INFO L427 AbstractCegarLoop]: === Iteration 3 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:17:08,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:17:08,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1513378118, now seen corresponding path program 1 times [2020-09-15 13:17:08,511 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:17:08,511 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901949281] [2020-09-15 13:17:08,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:17:08,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:17:08,570 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-15 13:17:08,570 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901949281] [2020-09-15 13:17:08,570 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 13:17:08,570 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-15 13:17:08,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732512530] [2020-09-15 13:17:08,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-15 13:17:08,571 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:17:08,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-15 13:17:08,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-15 13:17:08,572 INFO L87 Difference]: Start difference. First operand 6331 states and 28544 transitions. Second operand 5 states. [2020-09-15 13:17:08,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:17:08,768 INFO L93 Difference]: Finished difference Result 11081 states and 46826 transitions. [2020-09-15 13:17:08,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-15 13:17:08,769 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-09-15 13:17:08,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:17:08,798 INFO L225 Difference]: With dead ends: 11081 [2020-09-15 13:17:08,798 INFO L226 Difference]: Without dead ends: 11068 [2020-09-15 13:17:08,799 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-15 13:17:08,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11068 states. [2020-09-15 13:17:09,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11068 to 7391. [2020-09-15 13:17:09,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7391 states. [2020-09-15 13:17:09,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7391 states to 7391 states and 33694 transitions. [2020-09-15 13:17:09,044 INFO L78 Accepts]: Start accepts. Automaton has 7391 states and 33694 transitions. Word has length 13 [2020-09-15 13:17:09,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:17:09,044 INFO L479 AbstractCegarLoop]: Abstraction has 7391 states and 33694 transitions. [2020-09-15 13:17:09,044 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-15 13:17:09,044 INFO L276 IsEmpty]: Start isEmpty. Operand 7391 states and 33694 transitions. [2020-09-15 13:17:09,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-15 13:17:09,045 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:17:09,045 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:17:09,045 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-09-15 13:17:09,045 INFO L427 AbstractCegarLoop]: === Iteration 4 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:17:09,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:17:09,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1678648171, now seen corresponding path program 1 times [2020-09-15 13:17:09,045 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:17:09,046 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189678809] [2020-09-15 13:17:09,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:17:09,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:17:09,149 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:17:09,149 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189678809] [2020-09-15 13:17:09,149 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86261850] [2020-09-15 13:17:09,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:17:09,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:17:09,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-15 13:17:09,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:17:09,358 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:17:09,358 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:17:09,359 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-09-15 13:17:09,359 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662768377] [2020-09-15 13:17:09,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-15 13:17:09,360 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:17:09,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-15 13:17:09,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-09-15 13:17:09,360 INFO L87 Difference]: Start difference. First operand 7391 states and 33694 transitions. Second operand 12 states. [2020-09-15 13:17:09,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:17:09,965 INFO L93 Difference]: Finished difference Result 16749 states and 66010 transitions. [2020-09-15 13:17:09,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-15 13:17:09,966 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-15 13:17:09,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:17:10,011 INFO L225 Difference]: With dead ends: 16749 [2020-09-15 13:17:10,011 INFO L226 Difference]: Without dead ends: 16736 [2020-09-15 13:17:10,011 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2020-09-15 13:17:10,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16736 states. [2020-09-15 13:17:10,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16736 to 7303. [2020-09-15 13:17:10,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7303 states. [2020-09-15 13:17:10,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7303 states to 7303 states and 33260 transitions. [2020-09-15 13:17:10,327 INFO L78 Accepts]: Start accepts. Automaton has 7303 states and 33260 transitions. Word has length 15 [2020-09-15 13:17:10,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:17:10,327 INFO L479 AbstractCegarLoop]: Abstraction has 7303 states and 33260 transitions. [2020-09-15 13:17:10,327 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-15 13:17:10,327 INFO L276 IsEmpty]: Start isEmpty. Operand 7303 states and 33260 transitions. [2020-09-15 13:17:10,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-15 13:17:10,328 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:17:10,328 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:17:10,533 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:17:10,534 INFO L427 AbstractCegarLoop]: === Iteration 5 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:17:10,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:17:10,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1637555113, now seen corresponding path program 2 times [2020-09-15 13:17:10,535 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:17:10,536 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214847023] [2020-09-15 13:17:10,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:17:10,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:17:10,599 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-15 13:17:10,600 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214847023] [2020-09-15 13:17:10,600 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 13:17:10,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-15 13:17:10,600 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742642426] [2020-09-15 13:17:10,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-15 13:17:10,601 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:17:10,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-15 13:17:10,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-15 13:17:10,601 INFO L87 Difference]: Start difference. First operand 7303 states and 33260 transitions. Second operand 7 states. [2020-09-15 13:17:11,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:17:11,052 INFO L93 Difference]: Finished difference Result 17085 states and 67393 transitions. [2020-09-15 13:17:11,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-15 13:17:11,053 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-09-15 13:17:11,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:17:11,098 INFO L225 Difference]: With dead ends: 17085 [2020-09-15 13:17:11,098 INFO L226 Difference]: Without dead ends: 17071 [2020-09-15 13:17:11,098 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-09-15 13:17:11,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17071 states. [2020-09-15 13:17:12,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17071 to 7048. [2020-09-15 13:17:12,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7048 states. [2020-09-15 13:17:12,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7048 states to 7048 states and 32136 transitions. [2020-09-15 13:17:12,144 INFO L78 Accepts]: Start accepts. Automaton has 7048 states and 32136 transitions. Word has length 15 [2020-09-15 13:17:12,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:17:12,144 INFO L479 AbstractCegarLoop]: Abstraction has 7048 states and 32136 transitions. [2020-09-15 13:17:12,144 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-15 13:17:12,145 INFO L276 IsEmpty]: Start isEmpty. Operand 7048 states and 32136 transitions. [2020-09-15 13:17:12,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-15 13:17:12,145 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:17:12,146 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:17:12,146 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-09-15 13:17:12,146 INFO L427 AbstractCegarLoop]: === Iteration 6 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:17:12,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:17:12,147 INFO L82 PathProgramCache]: Analyzing trace with hash -288445665, now seen corresponding path program 1 times [2020-09-15 13:17:12,147 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:17:12,147 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749249901] [2020-09-15 13:17:12,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:17:12,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:17:12,208 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-09-15 13:17:12,208 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749249901] [2020-09-15 13:17:12,208 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 13:17:12,209 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-15 13:17:12,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457263088] [2020-09-15 13:17:12,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-15 13:17:12,209 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:17:12,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-15 13:17:12,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-15 13:17:12,210 INFO L87 Difference]: Start difference. First operand 7048 states and 32136 transitions. Second operand 5 states. [2020-09-15 13:17:12,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:17:12,393 INFO L93 Difference]: Finished difference Result 12234 states and 52488 transitions. [2020-09-15 13:17:12,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-15 13:17:12,393 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-09-15 13:17:12,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:17:12,427 INFO L225 Difference]: With dead ends: 12234 [2020-09-15 13:17:12,427 INFO L226 Difference]: Without dead ends: 12212 [2020-09-15 13:17:12,427 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-15 13:17:12,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12212 states. [2020-09-15 13:17:12,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12212 to 8342. [2020-09-15 13:17:12,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8342 states. [2020-09-15 13:17:12,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8342 states to 8342 states and 38278 transitions. [2020-09-15 13:17:12,691 INFO L78 Accepts]: Start accepts. Automaton has 8342 states and 38278 transitions. Word has length 17 [2020-09-15 13:17:12,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:17:12,691 INFO L479 AbstractCegarLoop]: Abstraction has 8342 states and 38278 transitions. [2020-09-15 13:17:12,691 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-15 13:17:12,692 INFO L276 IsEmpty]: Start isEmpty. Operand 8342 states and 38278 transitions. [2020-09-15 13:17:12,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-15 13:17:12,692 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:17:12,692 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:17:12,693 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-09-15 13:17:12,693 INFO L427 AbstractCegarLoop]: === Iteration 7 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:17:12,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:17:12,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1255672082, now seen corresponding path program 1 times [2020-09-15 13:17:12,693 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:17:12,693 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967280861] [2020-09-15 13:17:12,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:17:12,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:17:12,762 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-09-15 13:17:12,763 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967280861] [2020-09-15 13:17:12,763 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231324458] [2020-09-15 13:17:12,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:17:12,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:17:12,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-15 13:17:12,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:17:12,923 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-09-15 13:17:12,924 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:17:12,924 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-09-15 13:17:12,924 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792729818] [2020-09-15 13:17:12,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-15 13:17:12,925 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:17:12,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-15 13:17:12,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-09-15 13:17:12,926 INFO L87 Difference]: Start difference. First operand 8342 states and 38278 transitions. Second operand 12 states. [2020-09-15 13:17:13,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:17:13,562 INFO L93 Difference]: Finished difference Result 19016 states and 76191 transitions. [2020-09-15 13:17:13,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-15 13:17:13,563 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 19 [2020-09-15 13:17:13,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:17:13,622 INFO L225 Difference]: With dead ends: 19016 [2020-09-15 13:17:13,622 INFO L226 Difference]: Without dead ends: 18998 [2020-09-15 13:17:13,622 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2020-09-15 13:17:13,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18998 states. [2020-09-15 13:17:13,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18998 to 8452. [2020-09-15 13:17:13,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8452 states. [2020-09-15 13:17:13,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8452 states to 8452 states and 38704 transitions. [2020-09-15 13:17:13,987 INFO L78 Accepts]: Start accepts. Automaton has 8452 states and 38704 transitions. Word has length 19 [2020-09-15 13:17:13,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:17:13,987 INFO L479 AbstractCegarLoop]: Abstraction has 8452 states and 38704 transitions. [2020-09-15 13:17:13,987 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-15 13:17:13,987 INFO L276 IsEmpty]: Start isEmpty. Operand 8452 states and 38704 transitions. [2020-09-15 13:17:13,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-15 13:17:13,989 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:17:13,989 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:17:14,189 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-09-15 13:17:14,190 INFO L427 AbstractCegarLoop]: === Iteration 8 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:17:14,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:17:14,191 INFO L82 PathProgramCache]: Analyzing trace with hash 402059005, now seen corresponding path program 1 times [2020-09-15 13:17:14,191 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:17:14,191 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724248024] [2020-09-15 13:17:14,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:17:14,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:17:14,266 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-15 13:17:14,267 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724248024] [2020-09-15 13:17:14,267 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099568783] [2020-09-15 13:17:14,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:17:14,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:17:14,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-15 13:17:14,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:17:14,451 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-15 13:17:14,451 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:17:14,451 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-09-15 13:17:14,452 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679377874] [2020-09-15 13:17:14,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-15 13:17:14,452 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:17:14,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-15 13:17:14,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-09-15 13:17:14,453 INFO L87 Difference]: Start difference. First operand 8452 states and 38704 transitions. Second operand 12 states. [2020-09-15 13:17:15,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:17:15,062 INFO L93 Difference]: Finished difference Result 19670 states and 79028 transitions. [2020-09-15 13:17:15,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-15 13:17:15,063 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 19 [2020-09-15 13:17:15,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:17:15,149 INFO L225 Difference]: With dead ends: 19670 [2020-09-15 13:17:15,149 INFO L226 Difference]: Without dead ends: 19645 [2020-09-15 13:17:15,150 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2020-09-15 13:17:15,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19645 states. [2020-09-15 13:17:15,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19645 to 8480. [2020-09-15 13:17:15,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8480 states. [2020-09-15 13:17:15,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8480 states to 8480 states and 38825 transitions. [2020-09-15 13:17:15,703 INFO L78 Accepts]: Start accepts. Automaton has 8480 states and 38825 transitions. Word has length 19 [2020-09-15 13:17:15,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:17:15,703 INFO L479 AbstractCegarLoop]: Abstraction has 8480 states and 38825 transitions. [2020-09-15 13:17:15,703 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-15 13:17:15,703 INFO L276 IsEmpty]: Start isEmpty. Operand 8480 states and 38825 transitions. [2020-09-15 13:17:15,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-15 13:17:15,704 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:17:15,704 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:17:15,905 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-09-15 13:17:15,905 INFO L427 AbstractCegarLoop]: === Iteration 9 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:17:15,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:17:15,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1976597437, now seen corresponding path program 2 times [2020-09-15 13:17:15,906 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:17:15,906 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88834958] [2020-09-15 13:17:15,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:17:15,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:17:15,979 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-09-15 13:17:15,979 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88834958] [2020-09-15 13:17:15,979 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 13:17:15,980 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-15 13:17:15,980 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61156905] [2020-09-15 13:17:15,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-15 13:17:15,980 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:17:15,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-15 13:17:15,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-15 13:17:15,981 INFO L87 Difference]: Start difference. First operand 8480 states and 38825 transitions. Second operand 7 states. [2020-09-15 13:17:16,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:17:16,427 INFO L93 Difference]: Finished difference Result 19852 states and 79846 transitions. [2020-09-15 13:17:16,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-15 13:17:16,428 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-09-15 13:17:16,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:17:16,481 INFO L225 Difference]: With dead ends: 19852 [2020-09-15 13:17:16,481 INFO L226 Difference]: Without dead ends: 19827 [2020-09-15 13:17:16,487 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-09-15 13:17:16,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19827 states. [2020-09-15 13:17:16,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19827 to 8379. [2020-09-15 13:17:16,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8379 states. [2020-09-15 13:17:16,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8379 states to 8379 states and 38406 transitions. [2020-09-15 13:17:16,850 INFO L78 Accepts]: Start accepts. Automaton has 8379 states and 38406 transitions. Word has length 19 [2020-09-15 13:17:16,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:17:16,850 INFO L479 AbstractCegarLoop]: Abstraction has 8379 states and 38406 transitions. [2020-09-15 13:17:16,850 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-15 13:17:16,850 INFO L276 IsEmpty]: Start isEmpty. Operand 8379 states and 38406 transitions. [2020-09-15 13:17:16,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-15 13:17:16,852 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:17:16,852 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:17:16,852 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-09-15 13:17:16,852 INFO L427 AbstractCegarLoop]: === Iteration 10 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:17:16,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:17:16,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1976577008, now seen corresponding path program 2 times [2020-09-15 13:17:16,853 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:17:16,853 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935067267] [2020-09-15 13:17:16,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:17:16,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:17:16,932 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-09-15 13:17:16,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935067267] [2020-09-15 13:17:16,933 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 13:17:16,933 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-15 13:17:16,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142159028] [2020-09-15 13:17:16,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-15 13:17:16,934 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:17:16,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-15 13:17:16,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-15 13:17:16,935 INFO L87 Difference]: Start difference. First operand 8379 states and 38406 transitions. Second operand 7 states. [2020-09-15 13:17:17,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:17:17,490 INFO L93 Difference]: Finished difference Result 19555 states and 78564 transitions. [2020-09-15 13:17:17,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-15 13:17:17,491 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-09-15 13:17:17,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:17:17,544 INFO L225 Difference]: With dead ends: 19555 [2020-09-15 13:17:17,545 INFO L226 Difference]: Without dead ends: 19530 [2020-09-15 13:17:17,545 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-09-15 13:17:17,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19530 states. [2020-09-15 13:17:17,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19530 to 8317. [2020-09-15 13:17:17,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8317 states. [2020-09-15 13:17:17,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8317 states to 8317 states and 38184 transitions. [2020-09-15 13:17:17,897 INFO L78 Accepts]: Start accepts. Automaton has 8317 states and 38184 transitions. Word has length 19 [2020-09-15 13:17:17,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:17:17,897 INFO L479 AbstractCegarLoop]: Abstraction has 8317 states and 38184 transitions. [2020-09-15 13:17:17,897 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-15 13:17:17,897 INFO L276 IsEmpty]: Start isEmpty. Operand 8317 states and 38184 transitions. [2020-09-15 13:17:17,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-15 13:17:17,899 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:17:17,899 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:17:17,899 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-09-15 13:17:17,899 INFO L427 AbstractCegarLoop]: === Iteration 11 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:17:17,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:17:17,900 INFO L82 PathProgramCache]: Analyzing trace with hash -1389591796, now seen corresponding path program 1 times [2020-09-15 13:17:17,900 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:17:17,900 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093641061] [2020-09-15 13:17:17,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:17:17,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:17:18,004 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:17:18,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093641061] [2020-09-15 13:17:18,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513565423] [2020-09-15 13:17:18,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:17:18,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:17:18,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 13:17:18,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:17:18,240 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:17:18,240 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:17:18,240 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-09-15 13:17:18,241 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52805153] [2020-09-15 13:17:18,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-15 13:17:18,241 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:17:18,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-15 13:17:18,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-09-15 13:17:18,242 INFO L87 Difference]: Start difference. First operand 8317 states and 38184 transitions. Second operand 16 states. [2020-09-15 13:17:19,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:17:19,482 INFO L93 Difference]: Finished difference Result 26969 states and 101544 transitions. [2020-09-15 13:17:19,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 13:17:19,483 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 21 [2020-09-15 13:17:19,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:17:19,554 INFO L225 Difference]: With dead ends: 26969 [2020-09-15 13:17:19,555 INFO L226 Difference]: Without dead ends: 26957 [2020-09-15 13:17:19,555 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=397, Invalid=1085, Unknown=0, NotChecked=0, Total=1482 [2020-09-15 13:17:19,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26957 states. [2020-09-15 13:17:20,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26957 to 8204. [2020-09-15 13:17:20,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8204 states. [2020-09-15 13:17:20,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8204 states to 8204 states and 37628 transitions. [2020-09-15 13:17:20,143 INFO L78 Accepts]: Start accepts. Automaton has 8204 states and 37628 transitions. Word has length 21 [2020-09-15 13:17:20,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:17:20,143 INFO L479 AbstractCegarLoop]: Abstraction has 8204 states and 37628 transitions. [2020-09-15 13:17:20,143 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-15 13:17:20,143 INFO L276 IsEmpty]: Start isEmpty. Operand 8204 states and 37628 transitions. [2020-09-15 13:17:20,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-15 13:17:20,144 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:17:20,144 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:17:20,345 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:17:20,345 INFO L427 AbstractCegarLoop]: === Iteration 12 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:17:20,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:17:20,346 INFO L82 PathProgramCache]: Analyzing trace with hash 184946636, now seen corresponding path program 2 times [2020-09-15 13:17:20,347 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:17:20,347 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109701012] [2020-09-15 13:17:20,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:17:20,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:17:20,455 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-09-15 13:17:20,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109701012] [2020-09-15 13:17:20,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754512149] [2020-09-15 13:17:20,456 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:17:20,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 13:17:20,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:17:20,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 13:17:20,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:17:20,705 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-09-15 13:17:20,706 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:17:20,706 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-09-15 13:17:20,706 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626940137] [2020-09-15 13:17:20,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-15 13:17:20,707 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:17:20,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-15 13:17:20,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-09-15 13:17:20,707 INFO L87 Difference]: Start difference. First operand 8204 states and 37628 transitions. Second operand 16 states. [2020-09-15 13:17:21,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:17:21,968 INFO L93 Difference]: Finished difference Result 26661 states and 100277 transitions. [2020-09-15 13:17:21,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 13:17:21,969 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 21 [2020-09-15 13:17:21,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:17:22,071 INFO L225 Difference]: With dead ends: 26661 [2020-09-15 13:17:22,071 INFO L226 Difference]: Without dead ends: 26645 [2020-09-15 13:17:22,072 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=397, Invalid=1085, Unknown=0, NotChecked=0, Total=1482 [2020-09-15 13:17:22,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26645 states. [2020-09-15 13:17:22,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26645 to 8091. [2020-09-15 13:17:22,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8091 states. [2020-09-15 13:17:22,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8091 states to 8091 states and 37076 transitions. [2020-09-15 13:17:22,746 INFO L78 Accepts]: Start accepts. Automaton has 8091 states and 37076 transitions. Word has length 21 [2020-09-15 13:17:22,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:17:22,747 INFO L479 AbstractCegarLoop]: Abstraction has 8091 states and 37076 transitions. [2020-09-15 13:17:22,747 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-15 13:17:22,747 INFO L276 IsEmpty]: Start isEmpty. Operand 8091 states and 37076 transitions. [2020-09-15 13:17:22,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-15 13:17:22,748 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:17:22,748 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:17:22,956 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-09-15 13:17:22,957 INFO L427 AbstractCegarLoop]: === Iteration 13 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:17:22,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:17:22,957 INFO L82 PathProgramCache]: Analyzing trace with hash -231570740, now seen corresponding path program 3 times [2020-09-15 13:17:22,958 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:17:22,958 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878671252] [2020-09-15 13:17:22,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:17:22,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:17:23,062 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-15 13:17:23,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878671252] [2020-09-15 13:17:23,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475565062] [2020-09-15 13:17:23,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:17:23,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-15 13:17:23,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:17:23,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 13:17:23,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:17:23,311 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-15 13:17:23,312 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:17:23,312 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-09-15 13:17:23,312 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539695322] [2020-09-15 13:17:23,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-15 13:17:23,313 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:17:23,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-15 13:17:23,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-09-15 13:17:23,313 INFO L87 Difference]: Start difference. First operand 8091 states and 37076 transitions. Second operand 16 states. [2020-09-15 13:17:24,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:17:24,493 INFO L93 Difference]: Finished difference Result 26686 states and 100402 transitions. [2020-09-15 13:17:24,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 13:17:24,494 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 21 [2020-09-15 13:17:24,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:17:24,569 INFO L225 Difference]: With dead ends: 26686 [2020-09-15 13:17:24,570 INFO L226 Difference]: Without dead ends: 26674 [2020-09-15 13:17:24,570 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=397, Invalid=1085, Unknown=0, NotChecked=0, Total=1482 [2020-09-15 13:17:24,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26674 states. [2020-09-15 13:17:24,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26674 to 7861. [2020-09-15 13:17:24,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7861 states. [2020-09-15 13:17:24,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7861 states to 7861 states and 36066 transitions. [2020-09-15 13:17:24,992 INFO L78 Accepts]: Start accepts. Automaton has 7861 states and 36066 transitions. Word has length 21 [2020-09-15 13:17:24,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:17:24,992 INFO L479 AbstractCegarLoop]: Abstraction has 7861 states and 36066 transitions. [2020-09-15 13:17:24,992 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-15 13:17:24,992 INFO L276 IsEmpty]: Start isEmpty. Operand 7861 states and 36066 transitions. [2020-09-15 13:17:24,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-15 13:17:24,993 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:17:24,993 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:17:25,194 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:17:25,194 INFO L427 AbstractCegarLoop]: === Iteration 14 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:17:25,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:17:25,195 INFO L82 PathProgramCache]: Analyzing trace with hash -168366002, now seen corresponding path program 4 times [2020-09-15 13:17:25,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:17:25,196 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223567464] [2020-09-15 13:17:25,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:17:25,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:17:25,318 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-15 13:17:25,318 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223567464] [2020-09-15 13:17:25,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260248969] [2020-09-15 13:17:25,319 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:17:25,604 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 13:17:25,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:17:25,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 13:17:25,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:17:25,737 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-15 13:17:25,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:17:25,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-09-15 13:17:25,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066159143] [2020-09-15 13:17:25,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-15 13:17:25,738 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:17:25,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-15 13:17:25,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-09-15 13:17:25,739 INFO L87 Difference]: Start difference. First operand 7861 states and 36066 transitions. Second operand 16 states. [2020-09-15 13:17:27,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:17:27,014 INFO L93 Difference]: Finished difference Result 26489 states and 99650 transitions. [2020-09-15 13:17:27,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 13:17:27,014 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 21 [2020-09-15 13:17:27,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:17:27,091 INFO L225 Difference]: With dead ends: 26489 [2020-09-15 13:17:27,091 INFO L226 Difference]: Without dead ends: 26473 [2020-09-15 13:17:27,092 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=397, Invalid=1085, Unknown=0, NotChecked=0, Total=1482 [2020-09-15 13:17:27,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26473 states. [2020-09-15 13:17:27,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26473 to 7748. [2020-09-15 13:17:27,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7748 states. [2020-09-15 13:17:27,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7748 states to 7748 states and 35514 transitions. [2020-09-15 13:17:27,509 INFO L78 Accepts]: Start accepts. Automaton has 7748 states and 35514 transitions. Word has length 21 [2020-09-15 13:17:27,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:17:27,509 INFO L479 AbstractCegarLoop]: Abstraction has 7748 states and 35514 transitions. [2020-09-15 13:17:27,509 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-15 13:17:27,509 INFO L276 IsEmpty]: Start isEmpty. Operand 7748 states and 35514 transitions. [2020-09-15 13:17:27,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-15 13:17:27,510 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:17:27,510 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:17:27,716 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-09-15 13:17:27,717 INFO L427 AbstractCegarLoop]: === Iteration 15 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:17:27,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:17:27,717 INFO L82 PathProgramCache]: Analyzing trace with hash 210203517, now seen corresponding path program 1 times [2020-09-15 13:17:27,718 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:17:27,718 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256105563] [2020-09-15 13:17:27,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:17:27,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:17:27,783 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-09-15 13:17:27,783 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256105563] [2020-09-15 13:17:27,784 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 13:17:27,784 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-15 13:17:27,784 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823811351] [2020-09-15 13:17:27,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-15 13:17:27,784 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:17:27,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-15 13:17:27,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-15 13:17:27,785 INFO L87 Difference]: Start difference. First operand 7748 states and 35514 transitions. Second operand 5 states. [2020-09-15 13:17:28,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:17:28,020 INFO L93 Difference]: Finished difference Result 13251 states and 57501 transitions. [2020-09-15 13:17:28,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-15 13:17:28,021 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-09-15 13:17:28,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:17:28,082 INFO L225 Difference]: With dead ends: 13251 [2020-09-15 13:17:28,082 INFO L226 Difference]: Without dead ends: 13220 [2020-09-15 13:17:28,082 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-15 13:17:28,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13220 states. [2020-09-15 13:17:28,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13220 to 9255. [2020-09-15 13:17:28,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9255 states. [2020-09-15 13:17:28,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9255 states to 9255 states and 42368 transitions. [2020-09-15 13:17:28,448 INFO L78 Accepts]: Start accepts. Automaton has 9255 states and 42368 transitions. Word has length 21 [2020-09-15 13:17:28,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:17:28,449 INFO L479 AbstractCegarLoop]: Abstraction has 9255 states and 42368 transitions. [2020-09-15 13:17:28,449 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-15 13:17:28,449 INFO L276 IsEmpty]: Start isEmpty. Operand 9255 states and 42368 transitions. [2020-09-15 13:17:28,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-15 13:17:28,451 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:17:28,451 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:17:28,451 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-09-15 13:17:28,451 INFO L427 AbstractCegarLoop]: === Iteration 16 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:17:28,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:17:28,452 INFO L82 PathProgramCache]: Analyzing trace with hash 1134578958, now seen corresponding path program 5 times [2020-09-15 13:17:28,452 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:17:28,452 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908230392] [2020-09-15 13:17:28,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:17:28,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:17:28,577 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-09-15 13:17:28,577 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908230392] [2020-09-15 13:17:28,577 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 13:17:28,578 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-15 13:17:28,578 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978495834] [2020-09-15 13:17:28,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-15 13:17:28,579 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:17:28,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-15 13:17:28,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-09-15 13:17:28,579 INFO L87 Difference]: Start difference. First operand 9255 states and 42368 transitions. Second operand 9 states. [2020-09-15 13:17:28,789 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-09-15 13:17:29,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:17:29,753 INFO L93 Difference]: Finished difference Result 29788 states and 113841 transitions. [2020-09-15 13:17:29,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 13:17:29,754 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2020-09-15 13:17:29,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:17:29,841 INFO L225 Difference]: With dead ends: 29788 [2020-09-15 13:17:29,841 INFO L226 Difference]: Without dead ends: 29770 [2020-09-15 13:17:29,842 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=264, Invalid=728, Unknown=0, NotChecked=0, Total=992 [2020-09-15 13:17:29,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29770 states. [2020-09-15 13:17:30,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29770 to 8964. [2020-09-15 13:17:30,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8964 states. [2020-09-15 13:17:30,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8964 states to 8964 states and 41031 transitions. [2020-09-15 13:17:30,368 INFO L78 Accepts]: Start accepts. Automaton has 8964 states and 41031 transitions. Word has length 21 [2020-09-15 13:17:30,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:17:30,369 INFO L479 AbstractCegarLoop]: Abstraction has 8964 states and 41031 transitions. [2020-09-15 13:17:30,369 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-15 13:17:30,369 INFO L276 IsEmpty]: Start isEmpty. Operand 8964 states and 41031 transitions. [2020-09-15 13:17:30,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-15 13:17:30,371 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:17:30,371 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:17:30,371 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-09-15 13:17:30,371 INFO L427 AbstractCegarLoop]: === Iteration 17 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:17:30,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:17:30,371 INFO L82 PathProgramCache]: Analyzing trace with hash 1114967118, now seen corresponding path program 6 times [2020-09-15 13:17:30,372 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:17:30,372 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668322069] [2020-09-15 13:17:30,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:17:30,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:17:30,481 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-09-15 13:17:30,481 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668322069] [2020-09-15 13:17:30,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 13:17:30,482 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-15 13:17:30,482 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173419972] [2020-09-15 13:17:30,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-15 13:17:30,482 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:17:30,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-15 13:17:30,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-09-15 13:17:30,483 INFO L87 Difference]: Start difference. First operand 8964 states and 41031 transitions. Second operand 9 states. [2020-09-15 13:17:31,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:17:31,617 INFO L93 Difference]: Finished difference Result 29379 states and 112099 transitions. [2020-09-15 13:17:31,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 13:17:31,618 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2020-09-15 13:17:31,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:17:31,701 INFO L225 Difference]: With dead ends: 29379 [2020-09-15 13:17:31,701 INFO L226 Difference]: Without dead ends: 29356 [2020-09-15 13:17:31,702 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=264, Invalid=728, Unknown=0, NotChecked=0, Total=992 [2020-09-15 13:17:31,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29356 states. [2020-09-15 13:17:32,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29356 to 8573. [2020-09-15 13:17:32,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8573 states. [2020-09-15 13:17:32,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8573 states to 8573 states and 39353 transitions. [2020-09-15 13:17:32,397 INFO L78 Accepts]: Start accepts. Automaton has 8573 states and 39353 transitions. Word has length 21 [2020-09-15 13:17:32,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:17:32,397 INFO L479 AbstractCegarLoop]: Abstraction has 8573 states and 39353 transitions. [2020-09-15 13:17:32,397 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-15 13:17:32,398 INFO L276 IsEmpty]: Start isEmpty. Operand 8573 states and 39353 transitions. [2020-09-15 13:17:32,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-15 13:17:32,400 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:17:32,400 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:17:32,400 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-09-15 13:17:32,400 INFO L427 AbstractCegarLoop]: === Iteration 18 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:17:32,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:17:32,401 INFO L82 PathProgramCache]: Analyzing trace with hash 715669452, now seen corresponding path program 1 times [2020-09-15 13:17:32,401 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:17:32,401 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638246423] [2020-09-15 13:17:32,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:17:32,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:17:32,485 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-09-15 13:17:32,486 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638246423] [2020-09-15 13:17:32,486 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238721470] [2020-09-15 13:17:32,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:17:32,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:17:32,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-15 13:17:32,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:17:32,671 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-09-15 13:17:32,672 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:17:32,672 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-09-15 13:17:32,672 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532681106] [2020-09-15 13:17:32,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-15 13:17:32,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:17:32,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-15 13:17:32,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-09-15 13:17:32,673 INFO L87 Difference]: Start difference. First operand 8573 states and 39353 transitions. Second operand 12 states. [2020-09-15 13:17:33,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:17:33,187 INFO L93 Difference]: Finished difference Result 19727 states and 80274 transitions. [2020-09-15 13:17:33,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-15 13:17:33,188 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2020-09-15 13:17:33,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:17:33,245 INFO L225 Difference]: With dead ends: 19727 [2020-09-15 13:17:33,246 INFO L226 Difference]: Without dead ends: 19703 [2020-09-15 13:17:33,246 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2020-09-15 13:17:33,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19703 states. [2020-09-15 13:17:33,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19703 to 8847. [2020-09-15 13:17:33,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8847 states. [2020-09-15 13:17:33,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8847 states to 8847 states and 40495 transitions. [2020-09-15 13:17:33,616 INFO L78 Accepts]: Start accepts. Automaton has 8847 states and 40495 transitions. Word has length 23 [2020-09-15 13:17:33,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:17:33,617 INFO L479 AbstractCegarLoop]: Abstraction has 8847 states and 40495 transitions. [2020-09-15 13:17:33,617 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-15 13:17:33,617 INFO L276 IsEmpty]: Start isEmpty. Operand 8847 states and 40495 transitions. [2020-09-15 13:17:33,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-15 13:17:33,619 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:17:33,619 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:17:33,819 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-09-15 13:17:33,820 INFO L427 AbstractCegarLoop]: === Iteration 19 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:17:33,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:17:33,821 INFO L82 PathProgramCache]: Analyzing trace with hash 504272987, now seen corresponding path program 1 times [2020-09-15 13:17:33,821 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:17:33,821 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205717545] [2020-09-15 13:17:33,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:17:33,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:17:33,906 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-09-15 13:17:33,907 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205717545] [2020-09-15 13:17:33,907 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329191637] [2020-09-15 13:17:33,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:17:33,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:17:33,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-15 13:17:33,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:17:34,061 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-09-15 13:17:34,061 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:17:34,062 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-09-15 13:17:34,062 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025707217] [2020-09-15 13:17:34,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-15 13:17:34,063 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:17:34,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-15 13:17:34,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-09-15 13:17:34,063 INFO L87 Difference]: Start difference. First operand 8847 states and 40495 transitions. Second operand 12 states. [2020-09-15 13:17:34,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:17:34,554 INFO L93 Difference]: Finished difference Result 20694 states and 84261 transitions. [2020-09-15 13:17:34,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-15 13:17:34,555 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2020-09-15 13:17:34,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:17:34,618 INFO L225 Difference]: With dead ends: 20694 [2020-09-15 13:17:34,618 INFO L226 Difference]: Without dead ends: 20666 [2020-09-15 13:17:34,618 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2020-09-15 13:17:34,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20666 states. [2020-09-15 13:17:35,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20666 to 9115. [2020-09-15 13:17:35,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9115 states. [2020-09-15 13:17:35,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9115 states to 9115 states and 41679 transitions. [2020-09-15 13:17:35,165 INFO L78 Accepts]: Start accepts. Automaton has 9115 states and 41679 transitions. Word has length 23 [2020-09-15 13:17:35,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:17:35,166 INFO L479 AbstractCegarLoop]: Abstraction has 9115 states and 41679 transitions. [2020-09-15 13:17:35,166 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-15 13:17:35,166 INFO L276 IsEmpty]: Start isEmpty. Operand 9115 states and 41679 transitions. [2020-09-15 13:17:35,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-15 13:17:35,169 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:17:35,169 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:17:35,382 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:17:35,382 INFO L427 AbstractCegarLoop]: === Iteration 20 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:17:35,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:17:35,383 INFO L82 PathProgramCache]: Analyzing trace with hash 591685125, now seen corresponding path program 1 times [2020-09-15 13:17:35,383 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:17:35,384 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985852611] [2020-09-15 13:17:35,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:17:35,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:17:35,463 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-09-15 13:17:35,464 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985852611] [2020-09-15 13:17:35,464 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302164977] [2020-09-15 13:17:35,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:17:35,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:17:35,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-15 13:17:35,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:17:35,653 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-09-15 13:17:35,654 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:17:35,654 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-09-15 13:17:35,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596411554] [2020-09-15 13:17:35,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-15 13:17:35,655 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:17:35,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-15 13:17:35,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-09-15 13:17:35,655 INFO L87 Difference]: Start difference. First operand 9115 states and 41679 transitions. Second operand 12 states. [2020-09-15 13:17:36,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:17:36,170 INFO L93 Difference]: Finished difference Result 21396 states and 87360 transitions. [2020-09-15 13:17:36,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-15 13:17:36,173 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2020-09-15 13:17:36,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:17:36,232 INFO L225 Difference]: With dead ends: 21396 [2020-09-15 13:17:36,232 INFO L226 Difference]: Without dead ends: 21359 [2020-09-15 13:17:36,233 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2020-09-15 13:17:36,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21359 states. [2020-09-15 13:17:36,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21359 to 9320. [2020-09-15 13:17:36,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9320 states. [2020-09-15 13:17:36,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9320 states to 9320 states and 42648 transitions. [2020-09-15 13:17:36,646 INFO L78 Accepts]: Start accepts. Automaton has 9320 states and 42648 transitions. Word has length 23 [2020-09-15 13:17:36,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:17:36,651 INFO L479 AbstractCegarLoop]: Abstraction has 9320 states and 42648 transitions. [2020-09-15 13:17:36,651 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-15 13:17:36,651 INFO L276 IsEmpty]: Start isEmpty. Operand 9320 states and 42648 transitions. [2020-09-15 13:17:36,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-15 13:17:36,653 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:17:36,653 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:17:36,864 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2020-09-15 13:17:36,865 INFO L427 AbstractCegarLoop]: === Iteration 21 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:17:36,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:17:36,865 INFO L82 PathProgramCache]: Analyzing trace with hash 142124187, now seen corresponding path program 2 times [2020-09-15 13:17:36,866 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:17:36,866 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800127969] [2020-09-15 13:17:36,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:17:36,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:17:36,945 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-09-15 13:17:36,946 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800127969] [2020-09-15 13:17:36,946 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 13:17:36,946 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-15 13:17:36,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643143998] [2020-09-15 13:17:36,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-15 13:17:36,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:17:36,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-15 13:17:36,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-15 13:17:36,948 INFO L87 Difference]: Start difference. First operand 9320 states and 42648 transitions. Second operand 7 states. [2020-09-15 13:17:37,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:17:37,420 INFO L93 Difference]: Finished difference Result 21489 states and 87752 transitions. [2020-09-15 13:17:37,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-15 13:17:37,421 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2020-09-15 13:17:37,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:17:37,482 INFO L225 Difference]: With dead ends: 21489 [2020-09-15 13:17:37,482 INFO L226 Difference]: Without dead ends: 21452 [2020-09-15 13:17:37,482 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-09-15 13:17:37,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21452 states. [2020-09-15 13:17:37,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21452 to 9401. [2020-09-15 13:17:37,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9401 states. [2020-09-15 13:17:37,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9401 states to 9401 states and 43010 transitions. [2020-09-15 13:17:37,874 INFO L78 Accepts]: Start accepts. Automaton has 9401 states and 43010 transitions. Word has length 23 [2020-09-15 13:17:37,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:17:37,875 INFO L479 AbstractCegarLoop]: Abstraction has 9401 states and 43010 transitions. [2020-09-15 13:17:37,875 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-15 13:17:37,875 INFO L276 IsEmpty]: Start isEmpty. Operand 9401 states and 43010 transitions. [2020-09-15 13:17:37,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-15 13:17:37,877 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:17:37,877 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:17:37,877 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-09-15 13:17:37,877 INFO L427 AbstractCegarLoop]: === Iteration 22 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:17:37,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:17:37,878 INFO L82 PathProgramCache]: Analyzing trace with hash 142117429, now seen corresponding path program 2 times [2020-09-15 13:17:37,878 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:17:37,878 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106040359] [2020-09-15 13:17:37,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:17:37,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:17:37,966 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-09-15 13:17:37,966 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106040359] [2020-09-15 13:17:37,966 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 13:17:37,967 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-15 13:17:37,967 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987043448] [2020-09-15 13:17:37,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-15 13:17:37,967 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:17:37,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-15 13:17:37,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-15 13:17:37,968 INFO L87 Difference]: Start difference. First operand 9401 states and 43010 transitions. Second operand 7 states. [2020-09-15 13:17:38,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:17:38,568 INFO L93 Difference]: Finished difference Result 21198 states and 86437 transitions. [2020-09-15 13:17:38,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-15 13:17:38,569 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2020-09-15 13:17:38,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:17:38,633 INFO L225 Difference]: With dead ends: 21198 [2020-09-15 13:17:38,633 INFO L226 Difference]: Without dead ends: 21161 [2020-09-15 13:17:38,633 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-09-15 13:17:38,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21161 states. [2020-09-15 13:17:38,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21161 to 9396. [2020-09-15 13:17:38,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9396 states. [2020-09-15 13:17:39,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9396 states to 9396 states and 42985 transitions. [2020-09-15 13:17:39,015 INFO L78 Accepts]: Start accepts. Automaton has 9396 states and 42985 transitions. Word has length 23 [2020-09-15 13:17:39,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:17:39,016 INFO L479 AbstractCegarLoop]: Abstraction has 9396 states and 42985 transitions. [2020-09-15 13:17:39,016 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-15 13:17:39,016 INFO L276 IsEmpty]: Start isEmpty. Operand 9396 states and 42985 transitions. [2020-09-15 13:17:39,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-15 13:17:39,018 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:17:39,018 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:17:39,018 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-09-15 13:17:39,018 INFO L427 AbstractCegarLoop]: === Iteration 23 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:17:39,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:17:39,019 INFO L82 PathProgramCache]: Analyzing trace with hash 142103758, now seen corresponding path program 2 times [2020-09-15 13:17:39,019 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:17:39,019 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137617844] [2020-09-15 13:17:39,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:17:39,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:17:39,105 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-09-15 13:17:39,105 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137617844] [2020-09-15 13:17:39,106 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 13:17:39,106 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-15 13:17:39,106 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752517468] [2020-09-15 13:17:39,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-15 13:17:39,106 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:17:39,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-15 13:17:39,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-15 13:17:39,107 INFO L87 Difference]: Start difference. First operand 9396 states and 42985 transitions. Second operand 7 states. [2020-09-15 13:17:39,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:17:39,672 INFO L93 Difference]: Finished difference Result 21067 states and 85734 transitions. [2020-09-15 13:17:39,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-15 13:17:39,673 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2020-09-15 13:17:39,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:17:39,759 INFO L225 Difference]: With dead ends: 21067 [2020-09-15 13:17:39,759 INFO L226 Difference]: Without dead ends: 21030 [2020-09-15 13:17:39,760 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-09-15 13:17:39,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21030 states. [2020-09-15 13:17:40,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21030 to 9426. [2020-09-15 13:17:40,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9426 states. [2020-09-15 13:17:40,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9426 states to 9426 states and 43057 transitions. [2020-09-15 13:17:40,167 INFO L78 Accepts]: Start accepts. Automaton has 9426 states and 43057 transitions. Word has length 23 [2020-09-15 13:17:40,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:17:40,168 INFO L479 AbstractCegarLoop]: Abstraction has 9426 states and 43057 transitions. [2020-09-15 13:17:40,168 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-15 13:17:40,168 INFO L276 IsEmpty]: Start isEmpty. Operand 9426 states and 43057 transitions. [2020-09-15 13:17:40,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-15 13:17:40,171 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:17:40,171 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:17:40,171 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-09-15 13:17:40,171 INFO L427 AbstractCegarLoop]: === Iteration 24 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:17:40,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:17:40,172 INFO L82 PathProgramCache]: Analyzing trace with hash 925732074, now seen corresponding path program 1 times [2020-09-15 13:17:40,172 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:17:40,172 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253966122] [2020-09-15 13:17:40,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:17:40,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:17:40,283 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-15 13:17:40,283 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253966122] [2020-09-15 13:17:40,284 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103133689] [2020-09-15 13:17:40,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:17:40,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:17:40,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 13:17:40,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:17:40,530 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-15 13:17:40,531 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:17:40,531 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-09-15 13:17:40,532 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350480455] [2020-09-15 13:17:40,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-15 13:17:40,532 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:17:40,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-15 13:17:40,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-09-15 13:17:40,535 INFO L87 Difference]: Start difference. First operand 9426 states and 43057 transitions. Second operand 16 states. [2020-09-15 13:17:41,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:17:41,910 INFO L93 Difference]: Finished difference Result 30145 states and 115754 transitions. [2020-09-15 13:17:41,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 13:17:41,911 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 25 [2020-09-15 13:17:41,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:17:41,991 INFO L225 Difference]: With dead ends: 30145 [2020-09-15 13:17:41,991 INFO L226 Difference]: Without dead ends: 30125 [2020-09-15 13:17:41,992 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=397, Invalid=1085, Unknown=0, NotChecked=0, Total=1482 [2020-09-15 13:17:42,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30125 states. [2020-09-15 13:17:42,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30125 to 9338. [2020-09-15 13:17:42,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9338 states. [2020-09-15 13:17:42,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9338 states to 9338 states and 42582 transitions. [2020-09-15 13:17:42,661 INFO L78 Accepts]: Start accepts. Automaton has 9338 states and 42582 transitions. Word has length 25 [2020-09-15 13:17:42,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:17:42,662 INFO L479 AbstractCegarLoop]: Abstraction has 9338 states and 42582 transitions. [2020-09-15 13:17:42,662 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-15 13:17:42,662 INFO L276 IsEmpty]: Start isEmpty. Operand 9338 states and 42582 transitions. [2020-09-15 13:17:42,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-15 13:17:42,666 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:17:42,666 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:17:42,867 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-09-15 13:17:42,867 INFO L427 AbstractCegarLoop]: === Iteration 25 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:17:42,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:17:42,868 INFO L82 PathProgramCache]: Analyzing trace with hash 1013144212, now seen corresponding path program 1 times [2020-09-15 13:17:42,868 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:17:42,868 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919119203] [2020-09-15 13:17:42,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:17:42,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:17:42,975 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-15 13:17:42,976 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919119203] [2020-09-15 13:17:42,976 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060533902] [2020-09-15 13:17:42,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:17:43,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:17:43,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 13:17:43,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:17:43,215 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-15 13:17:43,215 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:17:43,216 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-09-15 13:17:43,216 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072893119] [2020-09-15 13:17:43,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-15 13:17:43,216 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:17:43,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-15 13:17:43,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-09-15 13:17:43,217 INFO L87 Difference]: Start difference. First operand 9338 states and 42582 transitions. Second operand 16 states. [2020-09-15 13:17:44,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:17:44,411 INFO L93 Difference]: Finished difference Result 29696 states and 113916 transitions. [2020-09-15 13:17:44,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 13:17:44,411 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 25 [2020-09-15 13:17:44,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:17:44,492 INFO L225 Difference]: With dead ends: 29696 [2020-09-15 13:17:44,492 INFO L226 Difference]: Without dead ends: 29676 [2020-09-15 13:17:44,492 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=397, Invalid=1085, Unknown=0, NotChecked=0, Total=1482 [2020-09-15 13:17:44,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29676 states. [2020-09-15 13:17:44,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29676 to 9291. [2020-09-15 13:17:44,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9291 states. [2020-09-15 13:17:44,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9291 states to 9291 states and 42295 transitions. [2020-09-15 13:17:44,975 INFO L78 Accepts]: Start accepts. Automaton has 9291 states and 42295 transitions. Word has length 25 [2020-09-15 13:17:44,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:17:44,975 INFO L479 AbstractCegarLoop]: Abstraction has 9291 states and 42295 transitions. [2020-09-15 13:17:44,975 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-15 13:17:44,975 INFO L276 IsEmpty]: Start isEmpty. Operand 9291 states and 42295 transitions. [2020-09-15 13:17:44,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-15 13:17:44,979 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:17:44,979 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:17:45,180 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-09-15 13:17:45,181 INFO L427 AbstractCegarLoop]: === Iteration 26 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:17:45,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:17:45,181 INFO L82 PathProgramCache]: Analyzing trace with hash 563583274, now seen corresponding path program 2 times [2020-09-15 13:17:45,182 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:17:45,182 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402241846] [2020-09-15 13:17:45,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:17:45,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:17:45,288 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-09-15 13:17:45,289 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402241846] [2020-09-15 13:17:45,289 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962885032] [2020-09-15 13:17:45,289 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:17:45,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 13:17:45,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:17:45,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 13:17:45,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:17:45,534 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-09-15 13:17:45,534 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:17:45,534 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-09-15 13:17:45,535 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899007764] [2020-09-15 13:17:45,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-15 13:17:45,535 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:17:45,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-15 13:17:45,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-09-15 13:17:45,536 INFO L87 Difference]: Start difference. First operand 9291 states and 42295 transitions. Second operand 16 states. [2020-09-15 13:17:46,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:17:46,791 INFO L93 Difference]: Finished difference Result 29267 states and 112142 transitions. [2020-09-15 13:17:46,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 13:17:46,792 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 25 [2020-09-15 13:17:46,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:17:46,875 INFO L225 Difference]: With dead ends: 29267 [2020-09-15 13:17:46,875 INFO L226 Difference]: Without dead ends: 29245 [2020-09-15 13:17:46,876 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=397, Invalid=1085, Unknown=0, NotChecked=0, Total=1482 [2020-09-15 13:17:47,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29245 states. [2020-09-15 13:17:47,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29245 to 9288. [2020-09-15 13:17:47,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9288 states. [2020-09-15 13:17:47,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9288 states to 9288 states and 42242 transitions. [2020-09-15 13:17:47,514 INFO L78 Accepts]: Start accepts. Automaton has 9288 states and 42242 transitions. Word has length 25 [2020-09-15 13:17:47,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:17:47,515 INFO L479 AbstractCegarLoop]: Abstraction has 9288 states and 42242 transitions. [2020-09-15 13:17:47,515 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-15 13:17:47,515 INFO L276 IsEmpty]: Start isEmpty. Operand 9288 states and 42242 transitions. [2020-09-15 13:17:47,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-15 13:17:47,518 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:17:47,518 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:17:47,718 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-09-15 13:17:47,719 INFO L427 AbstractCegarLoop]: === Iteration 27 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:17:47,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:17:47,719 INFO L82 PathProgramCache]: Analyzing trace with hash 563576516, now seen corresponding path program 2 times [2020-09-15 13:17:47,720 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:17:47,720 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979056064] [2020-09-15 13:17:47,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:17:47,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:17:47,839 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-09-15 13:17:47,839 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979056064] [2020-09-15 13:17:47,839 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10913283] [2020-09-15 13:17:47,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:17:47,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 13:17:47,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:17:47,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 13:17:47,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:17:48,058 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-09-15 13:17:48,059 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:17:48,059 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-09-15 13:17:48,059 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006866973] [2020-09-15 13:17:48,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-15 13:17:48,060 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:17:48,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-15 13:17:48,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-09-15 13:17:48,060 INFO L87 Difference]: Start difference. First operand 9288 states and 42242 transitions. Second operand 16 states. [2020-09-15 13:17:49,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:17:49,473 INFO L93 Difference]: Finished difference Result 28920 states and 110796 transitions. [2020-09-15 13:17:49,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 13:17:49,474 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 25 [2020-09-15 13:17:49,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:17:49,556 INFO L225 Difference]: With dead ends: 28920 [2020-09-15 13:17:49,557 INFO L226 Difference]: Without dead ends: 28898 [2020-09-15 13:17:49,557 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=397, Invalid=1085, Unknown=0, NotChecked=0, Total=1482 [2020-09-15 13:17:49,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28898 states. [2020-09-15 13:17:50,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28898 to 9176. [2020-09-15 13:17:50,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9176 states. [2020-09-15 13:17:50,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9176 states to 9176 states and 41695 transitions. [2020-09-15 13:17:50,039 INFO L78 Accepts]: Start accepts. Automaton has 9176 states and 41695 transitions. Word has length 25 [2020-09-15 13:17:50,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:17:50,039 INFO L479 AbstractCegarLoop]: Abstraction has 9176 states and 41695 transitions. [2020-09-15 13:17:50,039 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-15 13:17:50,039 INFO L276 IsEmpty]: Start isEmpty. Operand 9176 states and 41695 transitions. [2020-09-15 13:17:50,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-15 13:17:50,043 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:17:50,043 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:17:50,243 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:17:50,244 INFO L427 AbstractCegarLoop]: === Iteration 28 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:17:50,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:17:50,244 INFO L82 PathProgramCache]: Analyzing trace with hash -2052215638, now seen corresponding path program 3 times [2020-09-15 13:17:50,245 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:17:50,245 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594547082] [2020-09-15 13:17:50,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:17:50,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:17:50,354 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-09-15 13:17:50,354 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594547082] [2020-09-15 13:17:50,354 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608975856] [2020-09-15 13:17:50,355 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:17:50,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-15 13:17:50,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:17:50,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 13:17:50,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:17:50,584 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-09-15 13:17:50,585 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:17:50,585 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-09-15 13:17:50,585 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029117815] [2020-09-15 13:17:50,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-15 13:17:50,586 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:17:50,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-15 13:17:50,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-09-15 13:17:50,587 INFO L87 Difference]: Start difference. First operand 9176 states and 41695 transitions. Second operand 16 states. [2020-09-15 13:17:51,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:17:51,796 INFO L93 Difference]: Finished difference Result 29038 states and 111216 transitions. [2020-09-15 13:17:51,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 13:17:51,797 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 25 [2020-09-15 13:17:51,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:17:51,878 INFO L225 Difference]: With dead ends: 29038 [2020-09-15 13:17:51,878 INFO L226 Difference]: Without dead ends: 29018 [2020-09-15 13:17:51,878 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=397, Invalid=1085, Unknown=0, NotChecked=0, Total=1482 [2020-09-15 13:17:52,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29018 states. [2020-09-15 13:17:52,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29018 to 9000. [2020-09-15 13:17:52,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9000 states. [2020-09-15 13:17:52,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9000 states to 9000 states and 40897 transitions. [2020-09-15 13:17:52,550 INFO L78 Accepts]: Start accepts. Automaton has 9000 states and 40897 transitions. Word has length 25 [2020-09-15 13:17:52,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:17:52,550 INFO L479 AbstractCegarLoop]: Abstraction has 9000 states and 40897 transitions. [2020-09-15 13:17:52,550 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-15 13:17:52,550 INFO L276 IsEmpty]: Start isEmpty. Operand 9000 states and 40897 transitions. [2020-09-15 13:17:52,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-15 13:17:52,553 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:17:52,554 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:17:52,754 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-09-15 13:17:52,755 INFO L427 AbstractCegarLoop]: === Iteration 29 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:17:52,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:17:52,755 INFO L82 PathProgramCache]: Analyzing trace with hash -275395741, now seen corresponding path program 1 times [2020-09-15 13:17:52,756 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:17:52,756 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698482436] [2020-09-15 13:17:52,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:17:52,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:17:52,865 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-09-15 13:17:52,866 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698482436] [2020-09-15 13:17:52,866 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788832439] [2020-09-15 13:17:52,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:17:52,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:17:52,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 13:17:52,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:17:53,101 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-09-15 13:17:53,102 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:17:53,102 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-09-15 13:17:53,103 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349744859] [2020-09-15 13:17:53,103 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-15 13:17:53,103 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:17:53,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-15 13:17:53,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-09-15 13:17:53,103 INFO L87 Difference]: Start difference. First operand 9000 states and 40897 transitions. Second operand 16 states. [2020-09-15 13:17:54,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:17:54,528 INFO L93 Difference]: Finished difference Result 29417 states and 113034 transitions. [2020-09-15 13:17:54,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 13:17:54,529 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 25 [2020-09-15 13:17:54,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:17:54,616 INFO L225 Difference]: With dead ends: 29417 [2020-09-15 13:17:54,616 INFO L226 Difference]: Without dead ends: 29397 [2020-09-15 13:17:54,617 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=397, Invalid=1085, Unknown=0, NotChecked=0, Total=1482 [2020-09-15 13:17:54,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29397 states. [2020-09-15 13:17:55,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29397 to 8990. [2020-09-15 13:17:55,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8990 states. [2020-09-15 13:17:55,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8990 states to 8990 states and 40786 transitions. [2020-09-15 13:17:55,105 INFO L78 Accepts]: Start accepts. Automaton has 8990 states and 40786 transitions. Word has length 25 [2020-09-15 13:17:55,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:17:55,105 INFO L479 AbstractCegarLoop]: Abstraction has 8990 states and 40786 transitions. [2020-09-15 13:17:55,105 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-15 13:17:55,106 INFO L276 IsEmpty]: Start isEmpty. Operand 8990 states and 40786 transitions. [2020-09-15 13:17:55,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-15 13:17:55,109 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:17:55,109 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:17:55,314 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:17:55,314 INFO L427 AbstractCegarLoop]: === Iteration 30 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:17:55,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:17:55,315 INFO L82 PathProgramCache]: Analyzing trace with hash -724963437, now seen corresponding path program 2 times [2020-09-15 13:17:55,315 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:17:55,316 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784064000] [2020-09-15 13:17:55,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:17:55,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:17:55,419 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-09-15 13:17:55,419 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784064000] [2020-09-15 13:17:55,419 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830316004] [2020-09-15 13:17:55,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:17:55,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 13:17:55,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:17:55,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 13:17:55,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:17:55,664 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-09-15 13:17:55,665 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:17:55,665 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-09-15 13:17:55,665 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953880826] [2020-09-15 13:17:55,666 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-15 13:17:55,666 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:17:55,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-15 13:17:55,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-09-15 13:17:55,667 INFO L87 Difference]: Start difference. First operand 8990 states and 40786 transitions. Second operand 16 states. [2020-09-15 13:17:57,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:17:57,001 INFO L93 Difference]: Finished difference Result 29064 states and 111552 transitions. [2020-09-15 13:17:57,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 13:17:57,002 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 25 [2020-09-15 13:17:57,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:17:57,089 INFO L225 Difference]: With dead ends: 29064 [2020-09-15 13:17:57,089 INFO L226 Difference]: Without dead ends: 29037 [2020-09-15 13:17:57,089 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=397, Invalid=1085, Unknown=0, NotChecked=0, Total=1482 [2020-09-15 13:17:57,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29037 states. [2020-09-15 13:17:57,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29037 to 8953. [2020-09-15 13:17:57,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8953 states. [2020-09-15 13:17:57,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8953 states to 8953 states and 40609 transitions. [2020-09-15 13:17:57,815 INFO L78 Accepts]: Start accepts. Automaton has 8953 states and 40609 transitions. Word has length 25 [2020-09-15 13:17:57,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:17:57,816 INFO L479 AbstractCegarLoop]: Abstraction has 8953 states and 40609 transitions. [2020-09-15 13:17:57,816 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-15 13:17:57,816 INFO L276 IsEmpty]: Start isEmpty. Operand 8953 states and 40609 transitions. [2020-09-15 13:17:57,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-15 13:17:57,820 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:17:57,820 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:17:58,020 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2020-09-15 13:17:58,021 INFO L427 AbstractCegarLoop]: === Iteration 31 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:17:58,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:17:58,022 INFO L82 PathProgramCache]: Analyzing trace with hash -724977108, now seen corresponding path program 4 times [2020-09-15 13:17:58,022 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:17:58,022 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069819971] [2020-09-15 13:17:58,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:17:58,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:17:58,124 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-09-15 13:17:58,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069819971] [2020-09-15 13:17:58,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347566590] [2020-09-15 13:17:58,125 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:17:58,228 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 13:17:58,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:17:58,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 13:17:58,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:17:58,365 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-09-15 13:17:58,366 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:17:58,366 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-09-15 13:17:58,366 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725936289] [2020-09-15 13:17:58,366 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-15 13:17:58,367 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:17:58,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-15 13:17:58,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-09-15 13:17:58,367 INFO L87 Difference]: Start difference. First operand 8953 states and 40609 transitions. Second operand 16 states. [2020-09-15 13:17:59,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:17:59,596 INFO L93 Difference]: Finished difference Result 28523 states and 109227 transitions. [2020-09-15 13:17:59,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 13:17:59,596 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 25 [2020-09-15 13:17:59,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:17:59,677 INFO L225 Difference]: With dead ends: 28523 [2020-09-15 13:17:59,677 INFO L226 Difference]: Without dead ends: 28501 [2020-09-15 13:17:59,677 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=397, Invalid=1085, Unknown=0, NotChecked=0, Total=1482 [2020-09-15 13:17:59,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28501 states. [2020-09-15 13:18:00,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28501 to 8841. [2020-09-15 13:18:00,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8841 states. [2020-09-15 13:18:00,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8841 states to 8841 states and 40062 transitions. [2020-09-15 13:18:00,147 INFO L78 Accepts]: Start accepts. Automaton has 8841 states and 40062 transitions. Word has length 25 [2020-09-15 13:18:00,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:18:00,148 INFO L479 AbstractCegarLoop]: Abstraction has 8841 states and 40062 transitions. [2020-09-15 13:18:00,148 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-15 13:18:00,148 INFO L276 IsEmpty]: Start isEmpty. Operand 8841 states and 40062 transitions. [2020-09-15 13:18:00,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-15 13:18:00,153 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:18:00,153 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:18:00,359 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:18:00,359 INFO L427 AbstractCegarLoop]: === Iteration 32 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:18:00,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:18:00,360 INFO L82 PathProgramCache]: Analyzing trace with hash -1969402905, now seen corresponding path program 3 times [2020-09-15 13:18:00,360 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:18:00,361 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507268809] [2020-09-15 13:18:00,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:18:00,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:18:00,472 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-09-15 13:18:00,472 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507268809] [2020-09-15 13:18:00,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324083270] [2020-09-15 13:18:00,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:18:00,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-15 13:18:00,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:18:00,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 13:18:00,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:18:00,710 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-09-15 13:18:00,711 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:18:00,711 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-09-15 13:18:00,711 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441879131] [2020-09-15 13:18:00,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-15 13:18:00,712 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:18:00,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-15 13:18:00,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-09-15 13:18:00,712 INFO L87 Difference]: Start difference. First operand 8841 states and 40062 transitions. Second operand 16 states. [2020-09-15 13:18:01,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:18:01,877 INFO L93 Difference]: Finished difference Result 28636 states and 109852 transitions. [2020-09-15 13:18:01,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 13:18:01,878 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 25 [2020-09-15 13:18:01,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:18:01,960 INFO L225 Difference]: With dead ends: 28636 [2020-09-15 13:18:01,961 INFO L226 Difference]: Without dead ends: 28616 [2020-09-15 13:18:01,961 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=397, Invalid=1085, Unknown=0, NotChecked=0, Total=1482 [2020-09-15 13:18:02,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28616 states. [2020-09-15 13:18:02,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28616 to 8702. [2020-09-15 13:18:02,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8702 states. [2020-09-15 13:18:02,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8702 states to 8702 states and 39438 transitions. [2020-09-15 13:18:02,429 INFO L78 Accepts]: Start accepts. Automaton has 8702 states and 39438 transitions. Word has length 25 [2020-09-15 13:18:02,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:18:02,430 INFO L479 AbstractCegarLoop]: Abstraction has 8702 states and 39438 transitions. [2020-09-15 13:18:02,430 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-15 13:18:02,430 INFO L276 IsEmpty]: Start isEmpty. Operand 8702 states and 39438 transitions. [2020-09-15 13:18:02,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-15 13:18:02,433 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:18:02,433 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:18:02,639 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2020-09-15 13:18:02,640 INFO L427 AbstractCegarLoop]: === Iteration 33 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:18:02,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:18:02,640 INFO L82 PathProgramCache]: Analyzing trace with hash 1576190868, now seen corresponding path program 3 times [2020-09-15 13:18:02,641 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:18:02,641 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570851610] [2020-09-15 13:18:02,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:18:02,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:18:02,748 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-09-15 13:18:02,749 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570851610] [2020-09-15 13:18:02,749 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162904666] [2020-09-15 13:18:02,749 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:18:02,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-15 13:18:02,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:18:02,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 13:18:02,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:18:03,037 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-09-15 13:18:03,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:18:03,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-09-15 13:18:03,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434614711] [2020-09-15 13:18:03,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-15 13:18:03,039 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:18:03,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-15 13:18:03,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-09-15 13:18:03,040 INFO L87 Difference]: Start difference. First operand 8702 states and 39438 transitions. Second operand 16 states. [2020-09-15 13:18:04,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:18:04,527 INFO L93 Difference]: Finished difference Result 28297 states and 108461 transitions. [2020-09-15 13:18:04,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 13:18:04,528 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 25 [2020-09-15 13:18:04,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:18:04,780 INFO L225 Difference]: With dead ends: 28297 [2020-09-15 13:18:04,780 INFO L226 Difference]: Without dead ends: 28277 [2020-09-15 13:18:04,781 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=397, Invalid=1085, Unknown=0, NotChecked=0, Total=1482 [2020-09-15 13:18:04,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28277 states. [2020-09-15 13:18:05,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28277 to 8596. [2020-09-15 13:18:05,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8596 states. [2020-09-15 13:18:05,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8596 states to 8596 states and 38978 transitions. [2020-09-15 13:18:05,226 INFO L78 Accepts]: Start accepts. Automaton has 8596 states and 38978 transitions. Word has length 25 [2020-09-15 13:18:05,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:18:05,227 INFO L479 AbstractCegarLoop]: Abstraction has 8596 states and 38978 transitions. [2020-09-15 13:18:05,227 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-15 13:18:05,227 INFO L276 IsEmpty]: Start isEmpty. Operand 8596 states and 38978 transitions. [2020-09-15 13:18:05,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-15 13:18:05,230 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:18:05,230 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:18:05,431 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:18:05,431 INFO L427 AbstractCegarLoop]: === Iteration 34 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:18:05,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:18:05,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1673729315, now seen corresponding path program 4 times [2020-09-15 13:18:05,433 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:18:05,433 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771491379] [2020-09-15 13:18:05,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:18:05,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:18:05,551 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-09-15 13:18:05,552 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771491379] [2020-09-15 13:18:05,552 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690408656] [2020-09-15 13:18:05,552 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:18:05,632 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 13:18:05,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:18:05,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 13:18:05,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:18:05,764 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-09-15 13:18:05,765 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:18:05,765 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-09-15 13:18:05,765 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730041046] [2020-09-15 13:18:05,766 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-15 13:18:05,766 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:18:05,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-15 13:18:05,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-09-15 13:18:05,767 INFO L87 Difference]: Start difference. First operand 8596 states and 38978 transitions. Second operand 16 states. [2020-09-15 13:18:07,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:18:07,229 INFO L93 Difference]: Finished difference Result 28565 states and 109596 transitions. [2020-09-15 13:18:07,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 13:18:07,229 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 25 [2020-09-15 13:18:07,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:18:07,314 INFO L225 Difference]: With dead ends: 28565 [2020-09-15 13:18:07,314 INFO L226 Difference]: Without dead ends: 28538 [2020-09-15 13:18:07,315 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=397, Invalid=1085, Unknown=0, NotChecked=0, Total=1482 [2020-09-15 13:18:07,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28538 states. [2020-09-15 13:18:07,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28538 to 8563. [2020-09-15 13:18:07,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8563 states. [2020-09-15 13:18:07,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8563 states to 8563 states and 38809 transitions. [2020-09-15 13:18:07,789 INFO L78 Accepts]: Start accepts. Automaton has 8563 states and 38809 transitions. Word has length 25 [2020-09-15 13:18:07,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:18:07,789 INFO L479 AbstractCegarLoop]: Abstraction has 8563 states and 38809 transitions. [2020-09-15 13:18:07,789 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-15 13:18:07,789 INFO L276 IsEmpty]: Start isEmpty. Operand 8563 states and 38809 transitions. [2020-09-15 13:18:07,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-15 13:18:07,793 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:18:07,793 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:18:07,994 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2020-09-15 13:18:07,994 INFO L427 AbstractCegarLoop]: === Iteration 35 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:18:07,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:18:07,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1673708886, now seen corresponding path program 4 times [2020-09-15 13:18:07,995 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:18:07,996 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741864831] [2020-09-15 13:18:07,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:18:08,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:18:08,108 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-09-15 13:18:08,108 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741864831] [2020-09-15 13:18:08,109 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249251701] [2020-09-15 13:18:08,109 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:18:08,198 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 13:18:08,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:18:08,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 13:18:08,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:18:08,371 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-09-15 13:18:08,371 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:18:08,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-09-15 13:18:08,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867863205] [2020-09-15 13:18:08,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-15 13:18:08,372 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:18:08,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-15 13:18:08,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-09-15 13:18:08,373 INFO L87 Difference]: Start difference. First operand 8563 states and 38809 transitions. Second operand 16 states. [2020-09-15 13:18:09,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:18:09,785 INFO L93 Difference]: Finished difference Result 28213 states and 108237 transitions. [2020-09-15 13:18:09,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 13:18:09,786 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 25 [2020-09-15 13:18:09,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:18:09,869 INFO L225 Difference]: With dead ends: 28213 [2020-09-15 13:18:09,869 INFO L226 Difference]: Without dead ends: 28186 [2020-09-15 13:18:09,870 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=397, Invalid=1085, Unknown=0, NotChecked=0, Total=1482 [2020-09-15 13:18:10,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28186 states. [2020-09-15 13:18:10,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28186 to 8421. [2020-09-15 13:18:10,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8421 states. [2020-09-15 13:18:10,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8421 states to 8421 states and 38146 transitions. [2020-09-15 13:18:10,329 INFO L78 Accepts]: Start accepts. Automaton has 8421 states and 38146 transitions. Word has length 25 [2020-09-15 13:18:10,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:18:10,329 INFO L479 AbstractCegarLoop]: Abstraction has 8421 states and 38146 transitions. [2020-09-15 13:18:10,329 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-15 13:18:10,330 INFO L276 IsEmpty]: Start isEmpty. Operand 8421 states and 38146 transitions. [2020-09-15 13:18:10,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-15 13:18:10,333 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:18:10,333 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:18:10,533 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:18:10,534 INFO L427 AbstractCegarLoop]: === Iteration 36 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:18:10,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:18:10,535 INFO L82 PathProgramCache]: Analyzing trace with hash -857609261, now seen corresponding path program 5 times [2020-09-15 13:18:10,535 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:18:10,535 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797236896] [2020-09-15 13:18:10,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:18:10,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:18:10,645 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-09-15 13:18:10,646 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797236896] [2020-09-15 13:18:10,646 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 13:18:10,646 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-15 13:18:10,646 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500874269] [2020-09-15 13:18:10,647 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-15 13:18:10,647 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:18:10,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-15 13:18:10,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-09-15 13:18:10,647 INFO L87 Difference]: Start difference. First operand 8421 states and 38146 transitions. Second operand 9 states. [2020-09-15 13:18:11,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:18:11,930 INFO L93 Difference]: Finished difference Result 28226 states and 108274 transitions. [2020-09-15 13:18:11,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 13:18:11,931 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-09-15 13:18:11,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:18:12,017 INFO L225 Difference]: With dead ends: 28226 [2020-09-15 13:18:12,017 INFO L226 Difference]: Without dead ends: 28206 [2020-09-15 13:18:12,018 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=264, Invalid=728, Unknown=0, NotChecked=0, Total=992 [2020-09-15 13:18:12,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28206 states. [2020-09-15 13:18:12,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28206 to 8277. [2020-09-15 13:18:12,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8277 states. [2020-09-15 13:18:12,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8277 states to 8277 states and 37487 transitions. [2020-09-15 13:18:12,488 INFO L78 Accepts]: Start accepts. Automaton has 8277 states and 37487 transitions. Word has length 25 [2020-09-15 13:18:12,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:18:12,489 INFO L479 AbstractCegarLoop]: Abstraction has 8277 states and 37487 transitions. [2020-09-15 13:18:12,489 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-15 13:18:12,489 INFO L276 IsEmpty]: Start isEmpty. Operand 8277 states and 37487 transitions. [2020-09-15 13:18:12,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-15 13:18:12,494 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:18:12,494 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:18:12,494 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2020-09-15 13:18:12,494 INFO L427 AbstractCegarLoop]: === Iteration 37 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:18:12,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:18:12,495 INFO L82 PathProgramCache]: Analyzing trace with hash -857622932, now seen corresponding path program 5 times [2020-09-15 13:18:12,495 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:18:12,495 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259563659] [2020-09-15 13:18:12,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:18:12,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:18:12,603 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-09-15 13:18:12,604 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259563659] [2020-09-15 13:18:12,604 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 13:18:12,604 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-15 13:18:12,604 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286247643] [2020-09-15 13:18:12,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-15 13:18:12,605 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:18:12,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-15 13:18:12,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-09-15 13:18:12,605 INFO L87 Difference]: Start difference. First operand 8277 states and 37487 transitions. Second operand 9 states. [2020-09-15 13:18:13,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:18:13,743 INFO L93 Difference]: Finished difference Result 27801 states and 106552 transitions. [2020-09-15 13:18:13,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 13:18:13,744 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-09-15 13:18:13,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:18:13,825 INFO L225 Difference]: With dead ends: 27801 [2020-09-15 13:18:13,825 INFO L226 Difference]: Without dead ends: 27781 [2020-09-15 13:18:13,826 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=264, Invalid=728, Unknown=0, NotChecked=0, Total=992 [2020-09-15 13:18:13,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27781 states. [2020-09-15 13:18:14,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27781 to 8127. [2020-09-15 13:18:14,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8127 states. [2020-09-15 13:18:14,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8127 states to 8127 states and 36806 transitions. [2020-09-15 13:18:14,279 INFO L78 Accepts]: Start accepts. Automaton has 8127 states and 36806 transitions. Word has length 25 [2020-09-15 13:18:14,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:18:14,279 INFO L479 AbstractCegarLoop]: Abstraction has 8127 states and 36806 transitions. [2020-09-15 13:18:14,279 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-15 13:18:14,279 INFO L276 IsEmpty]: Start isEmpty. Operand 8127 states and 36806 transitions. [2020-09-15 13:18:14,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-15 13:18:14,282 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:18:14,282 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:18:14,283 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2020-09-15 13:18:14,283 INFO L427 AbstractCegarLoop]: === Iteration 38 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:18:14,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:18:14,283 INFO L82 PathProgramCache]: Analyzing trace with hash -864096941, now seen corresponding path program 6 times [2020-09-15 13:18:14,283 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:18:14,283 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202553201] [2020-09-15 13:18:14,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:18:14,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:18:14,393 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-09-15 13:18:14,393 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202553201] [2020-09-15 13:18:14,394 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 13:18:14,394 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-15 13:18:14,394 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898894953] [2020-09-15 13:18:14,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-15 13:18:14,394 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:18:14,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-15 13:18:14,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-09-15 13:18:14,395 INFO L87 Difference]: Start difference. First operand 8127 states and 36806 transitions. Second operand 9 states. [2020-09-15 13:18:15,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:18:15,539 INFO L93 Difference]: Finished difference Result 27548 states and 105447 transitions. [2020-09-15 13:18:15,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 13:18:15,540 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-09-15 13:18:15,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:18:15,625 INFO L225 Difference]: With dead ends: 27548 [2020-09-15 13:18:15,625 INFO L226 Difference]: Without dead ends: 27521 [2020-09-15 13:18:15,625 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=264, Invalid=728, Unknown=0, NotChecked=0, Total=992 [2020-09-15 13:18:15,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27521 states. [2020-09-15 13:18:16,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27521 to 7841. [2020-09-15 13:18:16,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7841 states. [2020-09-15 13:18:16,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7841 states to 7841 states and 35578 transitions. [2020-09-15 13:18:16,084 INFO L78 Accepts]: Start accepts. Automaton has 7841 states and 35578 transitions. Word has length 25 [2020-09-15 13:18:16,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:18:16,085 INFO L479 AbstractCegarLoop]: Abstraction has 7841 states and 35578 transitions. [2020-09-15 13:18:16,085 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-15 13:18:16,085 INFO L276 IsEmpty]: Start isEmpty. Operand 7841 states and 35578 transitions. [2020-09-15 13:18:16,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-15 13:18:16,089 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:18:16,089 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:18:16,089 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2020-09-15 13:18:16,090 INFO L427 AbstractCegarLoop]: === Iteration 39 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:18:16,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:18:16,090 INFO L82 PathProgramCache]: Analyzing trace with hash -864117370, now seen corresponding path program 5 times [2020-09-15 13:18:16,090 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:18:16,090 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614560434] [2020-09-15 13:18:16,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:18:16,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:18:16,198 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-09-15 13:18:16,198 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614560434] [2020-09-15 13:18:16,199 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 13:18:16,199 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-15 13:18:16,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745288119] [2020-09-15 13:18:16,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-15 13:18:16,199 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:18:16,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-15 13:18:16,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-09-15 13:18:16,200 INFO L87 Difference]: Start difference. First operand 7841 states and 35578 transitions. Second operand 9 states. [2020-09-15 13:18:17,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:18:17,581 INFO L93 Difference]: Finished difference Result 27167 states and 103966 transitions. [2020-09-15 13:18:17,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 13:18:17,581 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-09-15 13:18:17,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:18:17,682 INFO L225 Difference]: With dead ends: 27167 [2020-09-15 13:18:17,683 INFO L226 Difference]: Without dead ends: 27147 [2020-09-15 13:18:17,683 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=264, Invalid=728, Unknown=0, NotChecked=0, Total=992 [2020-09-15 13:18:17,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27147 states. [2020-09-15 13:18:18,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27147 to 7743. [2020-09-15 13:18:18,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7743 states. [2020-09-15 13:18:18,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7743 states to 7743 states and 35142 transitions. [2020-09-15 13:18:18,139 INFO L78 Accepts]: Start accepts. Automaton has 7743 states and 35142 transitions. Word has length 25 [2020-09-15 13:18:18,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:18:18,139 INFO L479 AbstractCegarLoop]: Abstraction has 7743 states and 35142 transitions. [2020-09-15 13:18:18,139 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-15 13:18:18,140 INFO L276 IsEmpty]: Start isEmpty. Operand 7743 states and 35142 transitions. [2020-09-15 13:18:18,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-15 13:18:18,143 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:18:18,143 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:18:18,143 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2020-09-15 13:18:18,143 INFO L427 AbstractCegarLoop]: === Iteration 40 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:18:18,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:18:18,144 INFO L82 PathProgramCache]: Analyzing trace with hash -877234772, now seen corresponding path program 6 times [2020-09-15 13:18:18,144 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:18:18,144 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526921704] [2020-09-15 13:18:18,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:18:18,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:18:18,261 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-09-15 13:18:18,262 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526921704] [2020-09-15 13:18:18,262 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 13:18:18,262 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-15 13:18:18,262 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691469976] [2020-09-15 13:18:18,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-15 13:18:18,263 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:18:18,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-15 13:18:18,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-09-15 13:18:18,263 INFO L87 Difference]: Start difference. First operand 7743 states and 35142 transitions. Second operand 9 states. [2020-09-15 13:18:19,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:18:19,458 INFO L93 Difference]: Finished difference Result 26955 states and 103085 transitions. [2020-09-15 13:18:19,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 13:18:19,459 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-09-15 13:18:19,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:18:19,543 INFO L225 Difference]: With dead ends: 26955 [2020-09-15 13:18:19,543 INFO L226 Difference]: Without dead ends: 26928 [2020-09-15 13:18:19,544 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=264, Invalid=728, Unknown=0, NotChecked=0, Total=992 [2020-09-15 13:18:19,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26928 states. [2020-09-15 13:18:19,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26928 to 7532. [2020-09-15 13:18:19,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7532 states. [2020-09-15 13:18:19,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7532 states to 7532 states and 34256 transitions. [2020-09-15 13:18:19,988 INFO L78 Accepts]: Start accepts. Automaton has 7532 states and 34256 transitions. Word has length 25 [2020-09-15 13:18:19,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:18:19,989 INFO L479 AbstractCegarLoop]: Abstraction has 7532 states and 34256 transitions. [2020-09-15 13:18:19,989 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-15 13:18:19,989 INFO L276 IsEmpty]: Start isEmpty. Operand 7532 states and 34256 transitions. [2020-09-15 13:18:19,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-15 13:18:19,992 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:18:19,992 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:18:19,993 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2020-09-15 13:18:19,993 INFO L427 AbstractCegarLoop]: === Iteration 41 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:18:19,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:18:19,993 INFO L82 PathProgramCache]: Analyzing trace with hash -877241530, now seen corresponding path program 6 times [2020-09-15 13:18:19,993 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:18:19,993 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410806978] [2020-09-15 13:18:19,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:18:20,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:18:20,110 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-09-15 13:18:20,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410806978] [2020-09-15 13:18:20,110 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 13:18:20,110 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-15 13:18:20,110 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423570802] [2020-09-15 13:18:20,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-15 13:18:20,111 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:18:20,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-15 13:18:20,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-09-15 13:18:20,111 INFO L87 Difference]: Start difference. First operand 7532 states and 34256 transitions. Second operand 9 states. [2020-09-15 13:18:21,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:18:21,421 INFO L93 Difference]: Finished difference Result 26632 states and 101828 transitions. [2020-09-15 13:18:21,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 13:18:21,422 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-09-15 13:18:21,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:18:21,508 INFO L225 Difference]: With dead ends: 26632 [2020-09-15 13:18:21,508 INFO L226 Difference]: Without dead ends: 26605 [2020-09-15 13:18:21,510 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=264, Invalid=728, Unknown=0, NotChecked=0, Total=992 [2020-09-15 13:18:21,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26605 states. [2020-09-15 13:18:21,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26605 to 7269. [2020-09-15 13:18:21,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7269 states. [2020-09-15 13:18:21,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7269 states to 7269 states and 33154 transitions. [2020-09-15 13:18:21,962 INFO L78 Accepts]: Start accepts. Automaton has 7269 states and 33154 transitions. Word has length 25 [2020-09-15 13:18:21,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:18:21,963 INFO L479 AbstractCegarLoop]: Abstraction has 7269 states and 33154 transitions. [2020-09-15 13:18:21,963 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-15 13:18:21,963 INFO L276 IsEmpty]: Start isEmpty. Operand 7269 states and 33154 transitions. [2020-09-15 13:18:21,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-15 13:18:21,966 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:18:21,966 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:18:21,966 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2020-09-15 13:18:21,966 INFO L427 AbstractCegarLoop]: === Iteration 42 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:18:21,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:18:21,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1311164244, now seen corresponding path program 1 times [2020-09-15 13:18:21,967 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:18:21,967 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385253788] [2020-09-15 13:18:21,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:18:21,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:18:22,040 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-09-15 13:18:22,041 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385253788] [2020-09-15 13:18:22,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 13:18:22,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-15 13:18:22,041 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797701225] [2020-09-15 13:18:22,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-15 13:18:22,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:18:22,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-15 13:18:22,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-15 13:18:22,043 INFO L87 Difference]: Start difference. First operand 7269 states and 33154 transitions. Second operand 5 states. [2020-09-15 13:18:22,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:18:22,243 INFO L93 Difference]: Finished difference Result 11919 states and 51979 transitions. [2020-09-15 13:18:22,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-15 13:18:22,244 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2020-09-15 13:18:22,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:18:22,283 INFO L225 Difference]: With dead ends: 11919 [2020-09-15 13:18:22,283 INFO L226 Difference]: Without dead ends: 11887 [2020-09-15 13:18:22,283 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-15 13:18:22,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11887 states. [2020-09-15 13:18:22,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11887 to 8560. [2020-09-15 13:18:22,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8560 states. [2020-09-15 13:18:22,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8560 states to 8560 states and 38495 transitions. [2020-09-15 13:18:22,574 INFO L78 Accepts]: Start accepts. Automaton has 8560 states and 38495 transitions. Word has length 25 [2020-09-15 13:18:22,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:18:22,574 INFO L479 AbstractCegarLoop]: Abstraction has 8560 states and 38495 transitions. [2020-09-15 13:18:22,574 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-15 13:18:22,574 INFO L276 IsEmpty]: Start isEmpty. Operand 8560 states and 38495 transitions. [2020-09-15 13:18:22,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-15 13:18:22,579 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:18:22,579 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:18:22,579 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2020-09-15 13:18:22,579 INFO L427 AbstractCegarLoop]: === Iteration 43 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:18:22,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:18:22,579 INFO L82 PathProgramCache]: Analyzing trace with hash 1986416772, now seen corresponding path program 1 times [2020-09-15 13:18:22,580 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:18:22,580 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869372577] [2020-09-15 13:18:22,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:18:22,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-15 13:18:22,592 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-15 13:18:22,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-15 13:18:22,606 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-15 13:18:22,615 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-09-15 13:18:22,616 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-15 13:18:22,616 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2020-09-15 13:18:22,616 WARN L633 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-09-15 13:18:22,617 WARN L363 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2020-09-15 13:18:22,617 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2020-09-15 13:18:22,634 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread3of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,634 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread3of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,634 WARN L313 ript$VariableManager]: TermVariabe thr2Thread3of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,634 WARN L313 ript$VariableManager]: TermVariabe thr2Thread3of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,635 WARN L313 ript$VariableManager]: TermVariabe thr2Thread3of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,635 WARN L313 ript$VariableManager]: TermVariabe thr2Thread3of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,635 WARN L313 ript$VariableManager]: TermVariabe thr2Thread3of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,635 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread6of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,635 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread6of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,635 WARN L313 ript$VariableManager]: TermVariabe thr2Thread6of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,635 WARN L313 ript$VariableManager]: TermVariabe thr2Thread6of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,636 WARN L313 ript$VariableManager]: TermVariabe thr2Thread6of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,636 WARN L313 ript$VariableManager]: TermVariabe thr2Thread6of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,636 WARN L313 ript$VariableManager]: TermVariabe thr2Thread6of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,637 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,637 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,637 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,637 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,637 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,637 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,638 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,638 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread2of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,638 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread2of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,638 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,639 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,639 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,639 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,639 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,639 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread5of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,639 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread5of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,640 WARN L313 ript$VariableManager]: TermVariabe thr2Thread5of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,640 WARN L313 ript$VariableManager]: TermVariabe thr2Thread5of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,640 WARN L313 ript$VariableManager]: TermVariabe thr2Thread5of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,640 WARN L313 ript$VariableManager]: TermVariabe thr2Thread5of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,640 WARN L313 ript$VariableManager]: TermVariabe thr2Thread5of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,640 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread4of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,641 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread4of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,641 WARN L313 ript$VariableManager]: TermVariabe thr2Thread4of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,641 WARN L313 ript$VariableManager]: TermVariabe thr2Thread4of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,641 WARN L313 ript$VariableManager]: TermVariabe thr2Thread4of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,641 WARN L313 ript$VariableManager]: TermVariabe thr2Thread4of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,641 WARN L313 ript$VariableManager]: TermVariabe thr2Thread4of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,642 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of6ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,642 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of6ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,642 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of6ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,642 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of6ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,642 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of6ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,642 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of6ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,643 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of6ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,643 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of6ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,643 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of6ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,643 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of6ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,643 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of6ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,643 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of6ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,644 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of6ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,644 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of6ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,644 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of6ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,644 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of6ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,644 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of6ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,644 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of6ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,644 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of6ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,645 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of6ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,645 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread5of6ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,645 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread5of6ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,645 WARN L313 ript$VariableManager]: TermVariabe thr1Thread5of6ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,645 WARN L313 ript$VariableManager]: TermVariabe thr1Thread5of6ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,645 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread5of6ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,646 WARN L313 ript$VariableManager]: TermVariabe thr1Thread5of6ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,646 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread5of6ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,646 WARN L313 ript$VariableManager]: TermVariabe thr1Thread5of6ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,646 WARN L313 ript$VariableManager]: TermVariabe thr1Thread5of6ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,646 WARN L313 ript$VariableManager]: TermVariabe thr1Thread5of6ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,646 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread6of6ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,647 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread6of6ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,647 WARN L313 ript$VariableManager]: TermVariabe thr1Thread6of6ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,647 WARN L313 ript$VariableManager]: TermVariabe thr1Thread6of6ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,647 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread6of6ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,647 WARN L313 ript$VariableManager]: TermVariabe thr1Thread6of6ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,647 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread6of6ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,648 WARN L313 ript$VariableManager]: TermVariabe thr1Thread6of6ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,648 WARN L313 ript$VariableManager]: TermVariabe thr1Thread6of6ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,648 WARN L313 ript$VariableManager]: TermVariabe thr1Thread6of6ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,648 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread4of6ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,648 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread4of6ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,648 WARN L313 ript$VariableManager]: TermVariabe thr1Thread4of6ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,648 WARN L313 ript$VariableManager]: TermVariabe thr1Thread4of6ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,649 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread4of6ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,649 WARN L313 ript$VariableManager]: TermVariabe thr1Thread4of6ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,649 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread4of6ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,649 WARN L313 ript$VariableManager]: TermVariabe thr1Thread4of6ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,649 WARN L313 ript$VariableManager]: TermVariabe thr1Thread4of6ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,649 WARN L313 ript$VariableManager]: TermVariabe thr1Thread4of6ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,650 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread3of6ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,650 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread3of6ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,650 WARN L313 ript$VariableManager]: TermVariabe thr1Thread3of6ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,650 WARN L313 ript$VariableManager]: TermVariabe thr1Thread3of6ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,650 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread3of6ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,650 WARN L313 ript$VariableManager]: TermVariabe thr1Thread3of6ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,650 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread3of6ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,651 WARN L313 ript$VariableManager]: TermVariabe thr1Thread3of6ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,651 WARN L313 ript$VariableManager]: TermVariabe thr1Thread3of6ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,651 WARN L313 ript$VariableManager]: TermVariabe thr1Thread3of6ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,651 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,652 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,652 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,652 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,652 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,654 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread2of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,654 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread2of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,654 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,654 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,654 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,656 WARN L313 ript$VariableManager]: TermVariabe thr2Thread3of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,656 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread3of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,656 WARN L313 ript$VariableManager]: TermVariabe thr2Thread3of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,656 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread3of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,656 WARN L313 ript$VariableManager]: TermVariabe thr2Thread3of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,659 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread4of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,659 WARN L313 ript$VariableManager]: TermVariabe thr2Thread4of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,659 WARN L313 ript$VariableManager]: TermVariabe thr2Thread4of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,660 WARN L313 ript$VariableManager]: TermVariabe thr2Thread4of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,660 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread4of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,661 WARN L313 ript$VariableManager]: TermVariabe thr2Thread5of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,661 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread5of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,661 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread5of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,662 WARN L313 ript$VariableManager]: TermVariabe thr2Thread5of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,662 WARN L313 ript$VariableManager]: TermVariabe thr2Thread5of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,663 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread6of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,664 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread6of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,664 WARN L313 ript$VariableManager]: TermVariabe thr2Thread6of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,664 WARN L313 ript$VariableManager]: TermVariabe thr2Thread6of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,664 WARN L313 ript$VariableManager]: TermVariabe thr2Thread6of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,665 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of6ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,665 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of6ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,666 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of6ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,666 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of6ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,666 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of6ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,666 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of6ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,667 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of6ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,668 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of6ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,668 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of6ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,668 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of6ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,668 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of6ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,668 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of6ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,670 WARN L313 ript$VariableManager]: TermVariabe thr1Thread3of6ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,670 WARN L313 ript$VariableManager]: TermVariabe thr1Thread3of6ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,670 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread3of6ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,670 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread3of6ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,670 WARN L313 ript$VariableManager]: TermVariabe thr1Thread3of6ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,670 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread3of6ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,671 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread4of6ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,672 WARN L313 ript$VariableManager]: TermVariabe thr1Thread4of6ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,672 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread4of6ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,672 WARN L313 ript$VariableManager]: TermVariabe thr1Thread4of6ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,672 WARN L313 ript$VariableManager]: TermVariabe thr1Thread4of6ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,672 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread4of6ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,673 WARN L313 ript$VariableManager]: TermVariabe thr1Thread5of6ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,674 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread5of6ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,674 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread5of6ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,674 WARN L313 ript$VariableManager]: TermVariabe thr1Thread5of6ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,674 WARN L313 ript$VariableManager]: TermVariabe thr1Thread5of6ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,674 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread5of6ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,675 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread6of6ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,675 WARN L313 ript$VariableManager]: TermVariabe thr1Thread6of6ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,675 WARN L313 ript$VariableManager]: TermVariabe thr1Thread6of6ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,676 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread6of6ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,676 WARN L313 ript$VariableManager]: TermVariabe thr1Thread6of6ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,676 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread6of6ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:18:22,677 INFO L251 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2020-09-15 13:18:22,677 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-15 13:18:22,678 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-15 13:18:22,678 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-15 13:18:22,678 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-15 13:18:22,678 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-15 13:18:22,678 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-15 13:18:22,678 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-15 13:18:22,678 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-15 13:18:22,680 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 156 places, 138 transitions, 396 flow [2020-09-15 13:18:22,680 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 156 places, 138 transitions, 396 flow [2020-09-15 13:18:22,700 INFO L129 PetriNetUnfolder]: 9/173 cut-off events. [2020-09-15 13:18:22,700 INFO L130 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2020-09-15 13:18:22,702 INFO L80 FinitePrefix]: Finished finitePrefix Result has 221 conditions, 173 events. 9/173 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 284 event pairs, 0 based on Foata normal form. 0/156 useless extension candidates. Maximal degree in co-relation 208. Up to 14 conditions per place. [2020-09-15 13:18:22,709 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 156 places, 138 transitions, 396 flow [2020-09-15 13:18:22,728 INFO L129 PetriNetUnfolder]: 9/173 cut-off events. [2020-09-15 13:18:22,729 INFO L130 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2020-09-15 13:18:22,731 INFO L80 FinitePrefix]: Finished finitePrefix Result has 221 conditions, 173 events. 9/173 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 284 event pairs, 0 based on Foata normal form. 0/156 useless extension candidates. Maximal degree in co-relation 208. Up to 14 conditions per place. [2020-09-15 13:18:22,738 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 2832 [2020-09-15 13:18:22,738 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-09-15 13:18:25,349 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 61 [2020-09-15 13:18:25,731 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 75 [2020-09-15 13:18:25,924 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 65 [2020-09-15 13:18:25,931 INFO L206 etLargeBlockEncoding]: Checked pairs total: 3678 [2020-09-15 13:18:25,931 INFO L214 etLargeBlockEncoding]: Total number of compositions: 113 [2020-09-15 13:18:25,931 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 71 places, 45 transitions, 210 flow [2020-09-15 13:18:27,921 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 18584 states. [2020-09-15 13:18:27,921 INFO L276 IsEmpty]: Start isEmpty. Operand 18584 states. [2020-09-15 13:18:27,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-09-15 13:18:27,921 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:18:27,921 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-09-15 13:18:27,922 INFO L427 AbstractCegarLoop]: === Iteration 1 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:18:27,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:18:27,922 INFO L82 PathProgramCache]: Analyzing trace with hash 1298891, now seen corresponding path program 1 times [2020-09-15 13:18:27,922 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:18:27,922 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142862979] [2020-09-15 13:18:27,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:18:27,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:18:27,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:18:27,946 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142862979] [2020-09-15 13:18:27,946 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 13:18:27,946 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-09-15 13:18:27,946 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781459213] [2020-09-15 13:18:27,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-15 13:18:27,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:18:27,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-15 13:18:27,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-15 13:18:27,948 INFO L87 Difference]: Start difference. First operand 18584 states. Second operand 3 states. [2020-09-15 13:18:28,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:18:28,138 INFO L93 Difference]: Finished difference Result 17885 states and 92755 transitions. [2020-09-15 13:18:28,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-15 13:18:28,139 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-09-15 13:18:28,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:18:28,218 INFO L225 Difference]: With dead ends: 17885 [2020-09-15 13:18:28,218 INFO L226 Difference]: Without dead ends: 16791 [2020-09-15 13:18:28,218 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-15 13:18:28,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16791 states. [2020-09-15 13:18:28,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16791 to 16791. [2020-09-15 13:18:28,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16791 states. [2020-09-15 13:18:29,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16791 states to 16791 states and 86558 transitions. [2020-09-15 13:18:29,067 INFO L78 Accepts]: Start accepts. Automaton has 16791 states and 86558 transitions. Word has length 3 [2020-09-15 13:18:29,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:18:29,067 INFO L479 AbstractCegarLoop]: Abstraction has 16791 states and 86558 transitions. [2020-09-15 13:18:29,067 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-15 13:18:29,067 INFO L276 IsEmpty]: Start isEmpty. Operand 16791 states and 86558 transitions. [2020-09-15 13:18:29,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-09-15 13:18:29,067 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:18:29,067 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:18:29,067 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2020-09-15 13:18:29,068 INFO L427 AbstractCegarLoop]: === Iteration 2 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:18:29,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:18:29,068 INFO L82 PathProgramCache]: Analyzing trace with hash 1091574945, now seen corresponding path program 1 times [2020-09-15 13:18:29,068 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:18:29,068 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941686203] [2020-09-15 13:18:29,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:18:29,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:18:29,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:18:29,113 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941686203] [2020-09-15 13:18:29,113 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 13:18:29,113 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-15 13:18:29,113 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396465892] [2020-09-15 13:18:29,113 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-15 13:18:29,114 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:18:29,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-15 13:18:29,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-15 13:18:29,114 INFO L87 Difference]: Start difference. First operand 16791 states and 86558 transitions. Second operand 5 states. [2020-09-15 13:18:29,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:18:29,455 INFO L93 Difference]: Finished difference Result 30985 states and 150574 transitions. [2020-09-15 13:18:29,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-15 13:18:29,456 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2020-09-15 13:18:29,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:18:29,580 INFO L225 Difference]: With dead ends: 30985 [2020-09-15 13:18:29,581 INFO L226 Difference]: Without dead ends: 30977 [2020-09-15 13:18:29,581 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-15 13:18:32,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30977 states. [2020-09-15 13:18:32,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30977 to 19868. [2020-09-15 13:18:32,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19868 states. [2020-09-15 13:18:32,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19868 states to 19868 states and 103363 transitions. [2020-09-15 13:18:32,776 INFO L78 Accepts]: Start accepts. Automaton has 19868 states and 103363 transitions. Word has length 9 [2020-09-15 13:18:32,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:18:32,776 INFO L479 AbstractCegarLoop]: Abstraction has 19868 states and 103363 transitions. [2020-09-15 13:18:32,776 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-15 13:18:32,776 INFO L276 IsEmpty]: Start isEmpty. Operand 19868 states and 103363 transitions. [2020-09-15 13:18:32,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 13:18:32,777 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:18:32,777 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:18:32,777 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2020-09-15 13:18:32,777 INFO L427 AbstractCegarLoop]: === Iteration 3 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:18:32,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:18:32,778 INFO L82 PathProgramCache]: Analyzing trace with hash -231509072, now seen corresponding path program 1 times [2020-09-15 13:18:32,778 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:18:32,778 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72080820] [2020-09-15 13:18:32,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:18:32,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:18:32,823 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-15 13:18:32,823 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72080820] [2020-09-15 13:18:32,824 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 13:18:32,824 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-15 13:18:32,824 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261154835] [2020-09-15 13:18:32,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-15 13:18:32,825 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:18:32,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-15 13:18:32,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-15 13:18:32,825 INFO L87 Difference]: Start difference. First operand 19868 states and 103363 transitions. Second operand 5 states. [2020-09-15 13:18:33,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:18:33,236 INFO L93 Difference]: Finished difference Result 36296 states and 178836 transitions. [2020-09-15 13:18:33,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-15 13:18:33,237 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-09-15 13:18:33,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:18:33,407 INFO L225 Difference]: With dead ends: 36296 [2020-09-15 13:18:33,407 INFO L226 Difference]: Without dead ends: 36280 [2020-09-15 13:18:33,408 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-15 13:18:34,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36280 states. [2020-09-15 13:18:34,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36280 to 23806. [2020-09-15 13:18:34,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23806 states. [2020-09-15 13:18:34,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23806 states to 23806 states and 125455 transitions. [2020-09-15 13:18:34,892 INFO L78 Accepts]: Start accepts. Automaton has 23806 states and 125455 transitions. Word has length 13 [2020-09-15 13:18:34,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:18:34,893 INFO L479 AbstractCegarLoop]: Abstraction has 23806 states and 125455 transitions. [2020-09-15 13:18:34,893 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-15 13:18:34,893 INFO L276 IsEmpty]: Start isEmpty. Operand 23806 states and 125455 transitions. [2020-09-15 13:18:34,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-15 13:18:34,893 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:18:34,893 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:18:34,894 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2020-09-15 13:18:34,894 INFO L427 AbstractCegarLoop]: === Iteration 4 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:18:34,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:18:34,894 INFO L82 PathProgramCache]: Analyzing trace with hash -588793474, now seen corresponding path program 1 times [2020-09-15 13:18:34,894 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:18:34,894 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710007746] [2020-09-15 13:18:34,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:18:34,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:18:34,958 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:18:34,958 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710007746] [2020-09-15 13:18:34,959 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936854362] [2020-09-15 13:18:34,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:18:35,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:18:35,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-15 13:18:35,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:18:35,163 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:18:35,164 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:18:35,164 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-09-15 13:18:35,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964664699] [2020-09-15 13:18:35,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-15 13:18:35,165 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:18:35,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-15 13:18:35,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-09-15 13:18:35,166 INFO L87 Difference]: Start difference. First operand 23806 states and 125455 transitions. Second operand 12 states. [2020-09-15 13:18:38,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:18:38,205 INFO L93 Difference]: Finished difference Result 56720 states and 262685 transitions. [2020-09-15 13:18:38,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-15 13:18:38,206 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-15 13:18:38,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:18:38,488 INFO L225 Difference]: With dead ends: 56720 [2020-09-15 13:18:38,488 INFO L226 Difference]: Without dead ends: 56704 [2020-09-15 13:18:38,488 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=260, Unknown=0, NotChecked=0, Total=380 [2020-09-15 13:18:39,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56704 states. [2020-09-15 13:18:40,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56704 to 23629. [2020-09-15 13:18:40,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23629 states. [2020-09-15 13:18:40,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23629 states to 23629 states and 124418 transitions. [2020-09-15 13:18:40,287 INFO L78 Accepts]: Start accepts. Automaton has 23629 states and 124418 transitions. Word has length 15 [2020-09-15 13:18:40,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:18:40,287 INFO L479 AbstractCegarLoop]: Abstraction has 23629 states and 124418 transitions. [2020-09-15 13:18:40,288 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-15 13:18:40,288 INFO L276 IsEmpty]: Start isEmpty. Operand 23629 states and 124418 transitions. [2020-09-15 13:18:40,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-15 13:18:40,288 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:18:40,288 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:18:40,488 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-09-15 13:18:40,489 INFO L427 AbstractCegarLoop]: === Iteration 5 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:18:40,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:18:40,490 INFO L82 PathProgramCache]: Analyzing trace with hash 858081470, now seen corresponding path program 2 times [2020-09-15 13:18:40,490 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:18:40,491 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861681993] [2020-09-15 13:18:40,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:18:40,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:18:40,561 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-15 13:18:40,561 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861681993] [2020-09-15 13:18:40,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 13:18:40,562 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-15 13:18:40,562 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546186803] [2020-09-15 13:18:40,562 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-15 13:18:40,563 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:18:40,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-15 13:18:40,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-15 13:18:40,563 INFO L87 Difference]: Start difference. First operand 23629 states and 124418 transitions. Second operand 7 states. [2020-09-15 13:18:41,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:18:41,417 INFO L93 Difference]: Finished difference Result 58078 states and 269185 transitions. [2020-09-15 13:18:41,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-15 13:18:41,417 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-09-15 13:18:41,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:18:41,678 INFO L225 Difference]: With dead ends: 58078 [2020-09-15 13:18:41,678 INFO L226 Difference]: Without dead ends: 58061 [2020-09-15 13:18:41,678 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-09-15 13:18:42,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58061 states. [2020-09-15 13:18:44,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58061 to 23109. [2020-09-15 13:18:44,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23109 states. [2020-09-15 13:18:44,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23109 states to 23109 states and 121651 transitions. [2020-09-15 13:18:44,356 INFO L78 Accepts]: Start accepts. Automaton has 23109 states and 121651 transitions. Word has length 15 [2020-09-15 13:18:44,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:18:44,357 INFO L479 AbstractCegarLoop]: Abstraction has 23109 states and 121651 transitions. [2020-09-15 13:18:44,357 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-15 13:18:44,357 INFO L276 IsEmpty]: Start isEmpty. Operand 23109 states and 121651 transitions. [2020-09-15 13:18:44,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-15 13:18:44,357 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:18:44,357 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:18:44,358 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2020-09-15 13:18:44,358 INFO L427 AbstractCegarLoop]: === Iteration 6 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:18:44,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:18:44,358 INFO L82 PathProgramCache]: Analyzing trace with hash 704376303, now seen corresponding path program 1 times [2020-09-15 13:18:44,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:18:44,358 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862563004] [2020-09-15 13:18:44,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:18:44,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:18:44,452 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-09-15 13:18:44,453 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862563004] [2020-09-15 13:18:44,453 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 13:18:44,453 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-15 13:18:44,453 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584589661] [2020-09-15 13:18:44,454 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-15 13:18:44,454 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:18:44,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-15 13:18:44,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-15 13:18:44,455 INFO L87 Difference]: Start difference. First operand 23109 states and 121651 transitions. Second operand 5 states. [2020-09-15 13:18:45,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:18:45,098 INFO L93 Difference]: Finished difference Result 41885 states and 209629 transitions. [2020-09-15 13:18:45,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-15 13:18:45,099 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-09-15 13:18:45,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:18:45,306 INFO L225 Difference]: With dead ends: 41885 [2020-09-15 13:18:45,306 INFO L226 Difference]: Without dead ends: 41856 [2020-09-15 13:18:45,306 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-15 13:18:45,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41856 states. [2020-09-15 13:18:46,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41856 to 28237. [2020-09-15 13:18:46,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28237 states. [2020-09-15 13:18:46,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28237 states to 28237 states and 150261 transitions. [2020-09-15 13:18:46,950 INFO L78 Accepts]: Start accepts. Automaton has 28237 states and 150261 transitions. Word has length 17 [2020-09-15 13:18:46,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:18:46,950 INFO L479 AbstractCegarLoop]: Abstraction has 28237 states and 150261 transitions. [2020-09-15 13:18:46,951 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-15 13:18:46,951 INFO L276 IsEmpty]: Start isEmpty. Operand 28237 states and 150261 transitions. [2020-09-15 13:18:46,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-15 13:18:46,951 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:18:46,951 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:18:46,952 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2020-09-15 13:18:46,952 INFO L427 AbstractCegarLoop]: === Iteration 7 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:18:46,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:18:46,952 INFO L82 PathProgramCache]: Analyzing trace with hash 1918672061, now seen corresponding path program 1 times [2020-09-15 13:18:46,952 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:18:46,952 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032977181] [2020-09-15 13:18:46,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:18:46,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:18:47,045 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-15 13:18:47,046 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032977181] [2020-09-15 13:18:47,046 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943040531] [2020-09-15 13:18:47,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:18:47,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:18:47,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-15 13:18:47,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:18:47,271 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-15 13:18:47,272 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:18:47,272 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-09-15 13:18:47,272 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247857327] [2020-09-15 13:18:47,273 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-15 13:18:47,273 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:18:47,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-15 13:18:47,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-09-15 13:18:47,274 INFO L87 Difference]: Start difference. First operand 28237 states and 150261 transitions. Second operand 12 states. [2020-09-15 13:18:50,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:18:50,769 INFO L93 Difference]: Finished difference Result 66831 states and 314874 transitions. [2020-09-15 13:18:50,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-15 13:18:50,771 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 19 [2020-09-15 13:18:50,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:18:51,127 INFO L225 Difference]: With dead ends: 66831 [2020-09-15 13:18:51,128 INFO L226 Difference]: Without dead ends: 66807 [2020-09-15 13:18:51,128 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=260, Unknown=0, NotChecked=0, Total=380 [2020-09-15 13:18:52,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66807 states. [2020-09-15 13:18:53,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66807 to 28673. [2020-09-15 13:18:53,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28673 states. [2020-09-15 13:18:53,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28673 states to 28673 states and 152375 transitions. [2020-09-15 13:18:53,331 INFO L78 Accepts]: Start accepts. Automaton has 28673 states and 152375 transitions. Word has length 19 [2020-09-15 13:18:53,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:18:53,331 INFO L479 AbstractCegarLoop]: Abstraction has 28673 states and 152375 transitions. [2020-09-15 13:18:53,331 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-15 13:18:53,331 INFO L276 IsEmpty]: Start isEmpty. Operand 28673 states and 152375 transitions. [2020-09-15 13:18:53,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-15 13:18:53,333 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:18:53,333 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:18:53,548 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable81 [2020-09-15 13:18:53,549 INFO L427 AbstractCegarLoop]: === Iteration 8 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:18:53,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:18:53,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1064014108, now seen corresponding path program 1 times [2020-09-15 13:18:53,550 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:18:53,550 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685732336] [2020-09-15 13:18:53,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:18:53,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:18:53,625 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-15 13:18:53,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685732336] [2020-09-15 13:18:53,626 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599200780] [2020-09-15 13:18:53,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:18:53,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:18:53,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-15 13:18:53,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:18:53,835 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-15 13:18:53,835 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:18:53,835 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-09-15 13:18:53,836 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047204868] [2020-09-15 13:18:53,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-15 13:18:53,836 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:18:53,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-15 13:18:53,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-09-15 13:18:53,837 INFO L87 Difference]: Start difference. First operand 28673 states and 152375 transitions. Second operand 12 states. [2020-09-15 13:18:54,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:18:54,816 INFO L93 Difference]: Finished difference Result 69484 states and 328264 transitions. [2020-09-15 13:18:54,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-15 13:18:54,817 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 19 [2020-09-15 13:18:54,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:18:55,156 INFO L225 Difference]: With dead ends: 69484 [2020-09-15 13:18:55,156 INFO L226 Difference]: Without dead ends: 69451 [2020-09-15 13:18:55,157 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=260, Unknown=0, NotChecked=0, Total=380 [2020-09-15 13:18:56,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69451 states. [2020-09-15 13:18:58,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69451 to 28873. [2020-09-15 13:18:58,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28873 states. [2020-09-15 13:18:58,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28873 states to 28873 states and 153454 transitions. [2020-09-15 13:18:58,242 INFO L78 Accepts]: Start accepts. Automaton has 28873 states and 153454 transitions. Word has length 19 [2020-09-15 13:18:58,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:18:58,242 INFO L479 AbstractCegarLoop]: Abstraction has 28873 states and 153454 transitions. [2020-09-15 13:18:58,242 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-15 13:18:58,242 INFO L276 IsEmpty]: Start isEmpty. Operand 28873 states and 153454 transitions. [2020-09-15 13:18:58,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-15 13:18:58,243 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:18:58,243 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:18:58,444 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:18:58,445 INFO L427 AbstractCegarLoop]: === Iteration 9 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:18:58,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:18:58,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1699177508, now seen corresponding path program 2 times [2020-09-15 13:18:58,446 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:18:58,446 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991489050] [2020-09-15 13:18:58,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:18:58,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:18:58,519 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-09-15 13:18:58,520 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991489050] [2020-09-15 13:18:58,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 13:18:58,520 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-15 13:18:58,521 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530780162] [2020-09-15 13:18:58,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-15 13:18:58,521 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:18:58,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-15 13:18:58,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-15 13:18:58,522 INFO L87 Difference]: Start difference. First operand 28873 states and 153454 transitions. Second operand 7 states. [2020-09-15 13:18:59,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:18:59,510 INFO L93 Difference]: Finished difference Result 70510 states and 333491 transitions. [2020-09-15 13:18:59,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-15 13:18:59,511 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-09-15 13:18:59,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:18:59,863 INFO L225 Difference]: With dead ends: 70510 [2020-09-15 13:18:59,863 INFO L226 Difference]: Without dead ends: 70477 [2020-09-15 13:18:59,864 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-09-15 13:19:00,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70477 states. [2020-09-15 13:19:02,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70477 to 28942. [2020-09-15 13:19:02,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28942 states. [2020-09-15 13:19:03,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28942 states to 28942 states and 153921 transitions. [2020-09-15 13:19:03,133 INFO L78 Accepts]: Start accepts. Automaton has 28942 states and 153921 transitions. Word has length 19 [2020-09-15 13:19:03,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:19:03,133 INFO L479 AbstractCegarLoop]: Abstraction has 28942 states and 153921 transitions. [2020-09-15 13:19:03,133 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-15 13:19:03,134 INFO L276 IsEmpty]: Start isEmpty. Operand 28942 states and 153921 transitions. [2020-09-15 13:19:03,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-15 13:19:03,135 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:19:03,135 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:19:03,136 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2020-09-15 13:19:03,136 INFO L427 AbstractCegarLoop]: === Iteration 10 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:19:03,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:19:03,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1699205315, now seen corresponding path program 2 times [2020-09-15 13:19:03,138 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:19:03,138 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597734757] [2020-09-15 13:19:03,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:19:03,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:19:03,222 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-09-15 13:19:03,223 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597734757] [2020-09-15 13:19:03,223 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 13:19:03,223 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-15 13:19:03,224 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599014944] [2020-09-15 13:19:03,224 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-15 13:19:03,224 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:19:03,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-15 13:19:03,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-15 13:19:03,225 INFO L87 Difference]: Start difference. First operand 28942 states and 153921 transitions. Second operand 7 states. [2020-09-15 13:19:04,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:19:04,183 INFO L93 Difference]: Finished difference Result 70096 states and 331298 transitions. [2020-09-15 13:19:04,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-15 13:19:04,185 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-09-15 13:19:04,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:19:04,523 INFO L225 Difference]: With dead ends: 70096 [2020-09-15 13:19:04,524 INFO L226 Difference]: Without dead ends: 70063 [2020-09-15 13:19:04,524 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-09-15 13:19:05,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70063 states. [2020-09-15 13:19:06,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70063 to 29094. [2020-09-15 13:19:06,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29094 states. [2020-09-15 13:19:06,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29094 states to 29094 states and 154883 transitions. [2020-09-15 13:19:06,843 INFO L78 Accepts]: Start accepts. Automaton has 29094 states and 154883 transitions. Word has length 19 [2020-09-15 13:19:06,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:19:06,843 INFO L479 AbstractCegarLoop]: Abstraction has 29094 states and 154883 transitions. [2020-09-15 13:19:06,843 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-15 13:19:06,843 INFO L276 IsEmpty]: Start isEmpty. Operand 29094 states and 154883 transitions. [2020-09-15 13:19:06,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-15 13:19:06,844 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:19:06,844 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:19:06,844 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2020-09-15 13:19:06,845 INFO L427 AbstractCegarLoop]: === Iteration 11 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:19:06,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:19:06,845 INFO L82 PathProgramCache]: Analyzing trace with hash -228866966, now seen corresponding path program 1 times [2020-09-15 13:19:06,845 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:19:06,845 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984222075] [2020-09-15 13:19:06,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:19:06,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:19:06,945 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:19:06,946 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984222075] [2020-09-15 13:19:06,946 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52187541] [2020-09-15 13:19:06,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:19:07,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:19:07,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 13:19:07,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:19:07,214 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:19:07,215 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:19:07,215 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-09-15 13:19:07,215 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617831571] [2020-09-15 13:19:07,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-15 13:19:07,216 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:19:07,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-15 13:19:07,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2020-09-15 13:19:07,216 INFO L87 Difference]: Start difference. First operand 29094 states and 154883 transitions. Second operand 16 states. [2020-09-15 13:19:09,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:19:09,647 INFO L93 Difference]: Finished difference Result 100731 states and 448596 transitions. [2020-09-15 13:19:09,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 13:19:09,649 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 21 [2020-09-15 13:19:09,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:19:10,107 INFO L225 Difference]: With dead ends: 100731 [2020-09-15 13:19:10,108 INFO L226 Difference]: Without dead ends: 100715 [2020-09-15 13:19:10,108 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=394, Invalid=1088, Unknown=0, NotChecked=0, Total=1482 [2020-09-15 13:19:11,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100715 states. [2020-09-15 13:19:12,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100715 to 28719. [2020-09-15 13:19:12,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28719 states. [2020-09-15 13:19:16,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28719 states to 28719 states and 152760 transitions. [2020-09-15 13:19:16,877 INFO L78 Accepts]: Start accepts. Automaton has 28719 states and 152760 transitions. Word has length 21 [2020-09-15 13:19:16,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:19:16,878 INFO L479 AbstractCegarLoop]: Abstraction has 28719 states and 152760 transitions. [2020-09-15 13:19:16,878 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-15 13:19:16,878 INFO L276 IsEmpty]: Start isEmpty. Operand 28719 states and 152760 transitions. [2020-09-15 13:19:16,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-15 13:19:16,879 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:19:16,879 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:19:17,080 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2020-09-15 13:19:17,080 INFO L427 AbstractCegarLoop]: === Iteration 12 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:19:17,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:19:17,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1302908714, now seen corresponding path program 2 times [2020-09-15 13:19:17,081 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:19:17,082 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802950867] [2020-09-15 13:19:17,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:19:17,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:19:17,190 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-15 13:19:17,191 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802950867] [2020-09-15 13:19:17,191 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462815050] [2020-09-15 13:19:17,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:19:17,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 13:19:17,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:19:17,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 13:19:17,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:19:17,459 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-15 13:19:17,460 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:19:17,460 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-09-15 13:19:17,460 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34105088] [2020-09-15 13:19:17,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-15 13:19:17,461 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:19:17,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-15 13:19:17,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2020-09-15 13:19:17,462 INFO L87 Difference]: Start difference. First operand 28719 states and 152760 transitions. Second operand 16 states. [2020-09-15 13:19:19,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:19:19,638 INFO L93 Difference]: Finished difference Result 99876 states and 444348 transitions. [2020-09-15 13:19:19,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 13:19:19,639 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 21 [2020-09-15 13:19:19,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:19:20,123 INFO L225 Difference]: With dead ends: 99876 [2020-09-15 13:19:20,123 INFO L226 Difference]: Without dead ends: 99855 [2020-09-15 13:19:20,124 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=394, Invalid=1088, Unknown=0, NotChecked=0, Total=1482 [2020-09-15 13:19:21,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99855 states. [2020-09-15 13:19:23,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99855 to 28343. [2020-09-15 13:19:23,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28343 states. [2020-09-15 13:19:23,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28343 states to 28343 states and 150639 transitions. [2020-09-15 13:19:23,685 INFO L78 Accepts]: Start accepts. Automaton has 28343 states and 150639 transitions. Word has length 21 [2020-09-15 13:19:23,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:19:23,685 INFO L479 AbstractCegarLoop]: Abstraction has 28343 states and 150639 transitions. [2020-09-15 13:19:23,685 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-15 13:19:23,685 INFO L276 IsEmpty]: Start isEmpty. Operand 28343 states and 150639 transitions. [2020-09-15 13:19:23,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-15 13:19:23,687 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:19:23,687 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:19:23,887 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:19:23,888 INFO L427 AbstractCegarLoop]: === Iteration 13 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:19:23,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:19:23,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1149181014, now seen corresponding path program 3 times [2020-09-15 13:19:23,890 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:19:23,890 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568471887] [2020-09-15 13:19:23,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:19:23,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:19:23,994 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-15 13:19:23,995 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568471887] [2020-09-15 13:19:23,995 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351083989] [2020-09-15 13:19:23,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:19:24,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-15 13:19:24,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:19:24,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 13:19:24,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:19:24,266 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-15 13:19:24,267 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:19:24,267 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-09-15 13:19:24,267 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521843478] [2020-09-15 13:19:24,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-15 13:19:24,268 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:19:24,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-15 13:19:24,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2020-09-15 13:19:24,269 INFO L87 Difference]: Start difference. First operand 28343 states and 150639 transitions. Second operand 16 states. [2020-09-15 13:19:26,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:19:26,521 INFO L93 Difference]: Finished difference Result 100071 states and 445291 transitions. [2020-09-15 13:19:26,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 13:19:26,522 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 21 [2020-09-15 13:19:26,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:19:26,979 INFO L225 Difference]: With dead ends: 100071 [2020-09-15 13:19:26,979 INFO L226 Difference]: Without dead ends: 100055 [2020-09-15 13:19:26,980 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=394, Invalid=1088, Unknown=0, NotChecked=0, Total=1482 [2020-09-15 13:19:28,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100055 states. [2020-09-15 13:19:30,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100055 to 27654. [2020-09-15 13:19:30,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27654 states. [2020-09-15 13:19:30,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27654 states to 27654 states and 147080 transitions. [2020-09-15 13:19:30,659 INFO L78 Accepts]: Start accepts. Automaton has 27654 states and 147080 transitions. Word has length 21 [2020-09-15 13:19:30,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:19:30,659 INFO L479 AbstractCegarLoop]: Abstraction has 27654 states and 147080 transitions. [2020-09-15 13:19:30,659 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-15 13:19:30,659 INFO L276 IsEmpty]: Start isEmpty. Operand 27654 states and 147080 transitions. [2020-09-15 13:19:30,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-15 13:19:30,660 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:19:30,660 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:19:30,861 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2020-09-15 13:19:30,861 INFO L427 AbstractCegarLoop]: === Iteration 14 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:19:30,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:19:30,862 INFO L82 PathProgramCache]: Analyzing trace with hash 315341610, now seen corresponding path program 4 times [2020-09-15 13:19:30,862 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:19:30,863 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244223103] [2020-09-15 13:19:30,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:19:30,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:19:30,975 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-15 13:19:30,976 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244223103] [2020-09-15 13:19:30,977 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992642323] [2020-09-15 13:19:30,977 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:19:31,099 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 13:19:31,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:19:31,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 13:19:31,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:19:31,255 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-15 13:19:31,255 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:19:31,256 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-09-15 13:19:31,256 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633646423] [2020-09-15 13:19:31,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-15 13:19:31,257 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:19:31,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-15 13:19:31,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2020-09-15 13:19:31,257 INFO L87 Difference]: Start difference. First operand 27654 states and 147080 transitions. Second operand 16 states. [2020-09-15 13:19:33,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:19:33,214 INFO L93 Difference]: Finished difference Result 99523 states and 442763 transitions. [2020-09-15 13:19:33,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 13:19:33,215 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 21 [2020-09-15 13:19:33,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:19:33,684 INFO L225 Difference]: With dead ends: 99523 [2020-09-15 13:19:33,684 INFO L226 Difference]: Without dead ends: 99502 [2020-09-15 13:19:33,685 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=394, Invalid=1088, Unknown=0, NotChecked=0, Total=1482 [2020-09-15 13:19:35,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99502 states. [2020-09-15 13:19:36,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99502 to 27278. [2020-09-15 13:19:36,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27278 states. [2020-09-15 13:19:37,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27278 states to 27278 states and 144959 transitions. [2020-09-15 13:19:37,086 INFO L78 Accepts]: Start accepts. Automaton has 27278 states and 144959 transitions. Word has length 21 [2020-09-15 13:19:37,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:19:37,087 INFO L479 AbstractCegarLoop]: Abstraction has 27278 states and 144959 transitions. [2020-09-15 13:19:37,087 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-15 13:19:37,087 INFO L276 IsEmpty]: Start isEmpty. Operand 27278 states and 144959 transitions. [2020-09-15 13:19:37,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-15 13:19:37,088 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:19:37,088 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:19:37,289 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2020-09-15 13:19:37,289 INFO L427 AbstractCegarLoop]: === Iteration 15 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:19:37,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:19:37,290 INFO L82 PathProgramCache]: Analyzing trace with hash -822012438, now seen corresponding path program 5 times [2020-09-15 13:19:37,291 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:19:37,291 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733997296] [2020-09-15 13:19:37,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:19:37,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:19:37,397 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-09-15 13:19:37,398 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733997296] [2020-09-15 13:19:37,398 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 13:19:37,398 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-15 13:19:37,399 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121795008] [2020-09-15 13:19:37,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-15 13:19:37,399 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:19:37,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-15 13:19:37,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-09-15 13:19:37,400 INFO L87 Difference]: Start difference. First operand 27278 states and 144959 transitions. Second operand 9 states. [2020-09-15 13:19:39,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:19:39,454 INFO L93 Difference]: Finished difference Result 99710 states and 443686 transitions. [2020-09-15 13:19:39,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 13:19:39,454 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2020-09-15 13:19:39,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:19:39,918 INFO L225 Difference]: With dead ends: 99710 [2020-09-15 13:19:39,918 INFO L226 Difference]: Without dead ends: 99694 [2020-09-15 13:19:39,918 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=264, Invalid=728, Unknown=0, NotChecked=0, Total=992 [2020-09-15 13:19:41,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99694 states. [2020-09-15 13:19:43,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99694 to 26597. [2020-09-15 13:19:43,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26597 states. [2020-09-15 13:19:43,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26597 states to 26597 states and 141420 transitions. [2020-09-15 13:19:43,397 INFO L78 Accepts]: Start accepts. Automaton has 26597 states and 141420 transitions. Word has length 21 [2020-09-15 13:19:43,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:19:43,397 INFO L479 AbstractCegarLoop]: Abstraction has 26597 states and 141420 transitions. [2020-09-15 13:19:43,397 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-15 13:19:43,397 INFO L276 IsEmpty]: Start isEmpty. Operand 26597 states and 141420 transitions. [2020-09-15 13:19:43,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-15 13:19:43,398 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:19:43,398 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:19:43,399 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2020-09-15 13:19:43,399 INFO L427 AbstractCegarLoop]: === Iteration 16 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:19:43,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:19:43,399 INFO L82 PathProgramCache]: Analyzing trace with hash -848707158, now seen corresponding path program 6 times [2020-09-15 13:19:43,399 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:19:43,399 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195543910] [2020-09-15 13:19:43,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:19:43,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:19:43,527 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-09-15 13:19:43,528 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195543910] [2020-09-15 13:19:43,528 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 13:19:43,528 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-15 13:19:43,529 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472950642] [2020-09-15 13:19:43,529 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-15 13:19:43,529 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:19:43,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-15 13:19:43,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-09-15 13:19:43,530 INFO L87 Difference]: Start difference. First operand 26597 states and 141420 transitions. Second operand 9 states. [2020-09-15 13:19:45,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:19:45,531 INFO L93 Difference]: Finished difference Result 98863 states and 439458 transitions. [2020-09-15 13:19:45,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 13:19:45,532 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2020-09-15 13:19:45,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:19:46,746 INFO L225 Difference]: With dead ends: 98863 [2020-09-15 13:19:46,746 INFO L226 Difference]: Without dead ends: 98841 [2020-09-15 13:19:46,747 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=264, Invalid=728, Unknown=0, NotChecked=0, Total=992 [2020-09-15 13:19:47,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98841 states. [2020-09-15 13:19:49,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98841 to 25744. [2020-09-15 13:19:49,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25744 states. [2020-09-15 13:19:49,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25744 states to 25744 states and 137181 transitions. [2020-09-15 13:19:49,510 INFO L78 Accepts]: Start accepts. Automaton has 25744 states and 137181 transitions. Word has length 21 [2020-09-15 13:19:49,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:19:49,510 INFO L479 AbstractCegarLoop]: Abstraction has 25744 states and 137181 transitions. [2020-09-15 13:19:49,510 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-15 13:19:49,510 INFO L276 IsEmpty]: Start isEmpty. Operand 25744 states and 137181 transitions. [2020-09-15 13:19:49,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-15 13:19:49,512 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:19:49,512 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:19:49,512 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2020-09-15 13:19:49,512 INFO L427 AbstractCegarLoop]: === Iteration 17 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:19:49,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:19:49,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1818695965, now seen corresponding path program 1 times [2020-09-15 13:19:49,513 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:19:49,513 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78889805] [2020-09-15 13:19:49,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:19:49,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:19:49,576 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-09-15 13:19:49,577 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78889805] [2020-09-15 13:19:49,577 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 13:19:49,577 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-15 13:19:49,577 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571295134] [2020-09-15 13:19:49,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-15 13:19:49,578 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:19:49,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-15 13:19:49,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-15 13:19:49,578 INFO L87 Difference]: Start difference. First operand 25744 states and 137181 transitions. Second operand 5 states. [2020-09-15 13:19:50,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:19:50,127 INFO L93 Difference]: Finished difference Result 46463 states and 236107 transitions. [2020-09-15 13:19:50,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-15 13:19:50,128 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-09-15 13:19:50,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:19:50,943 INFO L225 Difference]: With dead ends: 46463 [2020-09-15 13:19:50,944 INFO L226 Difference]: Without dead ends: 46417 [2020-09-15 13:19:50,944 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-15 13:19:51,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46417 states. [2020-09-15 13:19:52,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46417 to 31960. [2020-09-15 13:19:52,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31960 states. [2020-09-15 13:19:52,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31960 states to 31960 states and 171209 transitions. [2020-09-15 13:19:52,736 INFO L78 Accepts]: Start accepts. Automaton has 31960 states and 171209 transitions. Word has length 21 [2020-09-15 13:19:52,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:19:52,736 INFO L479 AbstractCegarLoop]: Abstraction has 31960 states and 171209 transitions. [2020-09-15 13:19:52,736 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-15 13:19:52,736 INFO L276 IsEmpty]: Start isEmpty. Operand 31960 states and 171209 transitions. [2020-09-15 13:19:52,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-15 13:19:52,738 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:19:52,738 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:19:52,739 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2020-09-15 13:19:52,739 INFO L427 AbstractCegarLoop]: === Iteration 18 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:19:52,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:19:52,739 INFO L82 PathProgramCache]: Analyzing trace with hash 605532395, now seen corresponding path program 1 times [2020-09-15 13:19:52,739 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:19:52,739 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50614274] [2020-09-15 13:19:52,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:19:52,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:19:52,818 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-15 13:19:52,819 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50614274] [2020-09-15 13:19:52,819 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483900067] [2020-09-15 13:19:52,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:19:52,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:19:52,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-15 13:19:52,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:19:53,046 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-15 13:19:53,046 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:19:53,046 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-09-15 13:19:53,047 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767275608] [2020-09-15 13:19:53,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-15 13:19:53,047 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:19:53,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-15 13:19:53,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-09-15 13:19:53,048 INFO L87 Difference]: Start difference. First operand 31960 states and 171209 transitions. Second operand 12 states. [2020-09-15 13:19:54,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:19:54,299 INFO L93 Difference]: Finished difference Result 75380 states and 361389 transitions. [2020-09-15 13:19:54,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-15 13:19:54,301 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2020-09-15 13:19:54,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:19:54,690 INFO L225 Difference]: With dead ends: 75380 [2020-09-15 13:19:54,690 INFO L226 Difference]: Without dead ends: 75344 [2020-09-15 13:19:54,690 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=260, Unknown=0, NotChecked=0, Total=380 [2020-09-15 13:19:56,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75344 states. [2020-09-15 13:19:57,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75344 to 32974. [2020-09-15 13:19:57,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32974 states. [2020-09-15 13:19:57,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32974 states to 32974 states and 176363 transitions. [2020-09-15 13:19:57,908 INFO L78 Accepts]: Start accepts. Automaton has 32974 states and 176363 transitions. Word has length 23 [2020-09-15 13:19:57,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:19:57,908 INFO L479 AbstractCegarLoop]: Abstraction has 32974 states and 176363 transitions. [2020-09-15 13:19:57,908 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-15 13:19:57,909 INFO L276 IsEmpty]: Start isEmpty. Operand 32974 states and 176363 transitions. [2020-09-15 13:19:57,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-15 13:19:57,911 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:19:57,911 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:19:58,112 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:19:58,112 INFO L427 AbstractCegarLoop]: === Iteration 19 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:19:58,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:19:58,113 INFO L82 PathProgramCache]: Analyzing trace with hash 768040394, now seen corresponding path program 1 times [2020-09-15 13:19:58,114 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:19:58,114 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325693861] [2020-09-15 13:19:58,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:19:58,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:19:58,196 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-09-15 13:19:58,197 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325693861] [2020-09-15 13:19:58,197 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059516071] [2020-09-15 13:19:58,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:19:58,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:19:58,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-15 13:19:58,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:19:58,416 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-09-15 13:19:58,416 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:19:58,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-09-15 13:19:58,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517561308] [2020-09-15 13:19:58,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-15 13:19:58,418 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:19:58,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-15 13:19:58,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-09-15 13:19:58,418 INFO L87 Difference]: Start difference. First operand 32974 states and 176363 transitions. Second operand 12 states. [2020-09-15 13:19:59,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:19:59,656 INFO L93 Difference]: Finished difference Result 79487 states and 381757 transitions. [2020-09-15 13:19:59,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-15 13:19:59,657 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2020-09-15 13:19:59,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:20:00,061 INFO L225 Difference]: With dead ends: 79487 [2020-09-15 13:20:00,062 INFO L226 Difference]: Without dead ends: 79445 [2020-09-15 13:20:00,062 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=260, Unknown=0, NotChecked=0, Total=380 [2020-09-15 13:20:01,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79445 states. [2020-09-15 13:20:03,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79445 to 33981. [2020-09-15 13:20:03,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33981 states. [2020-09-15 13:20:03,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33981 states to 33981 states and 181710 transitions. [2020-09-15 13:20:03,456 INFO L78 Accepts]: Start accepts. Automaton has 33981 states and 181710 transitions. Word has length 23 [2020-09-15 13:20:03,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:20:03,457 INFO L479 AbstractCegarLoop]: Abstraction has 33981 states and 181710 transitions. [2020-09-15 13:20:03,457 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-15 13:20:03,457 INFO L276 IsEmpty]: Start isEmpty. Operand 33981 states and 181710 transitions. [2020-09-15 13:20:03,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-15 13:20:03,460 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:20:03,460 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:20:03,660 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:20:03,661 INFO L427 AbstractCegarLoop]: === Iteration 20 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:20:03,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:20:03,662 INFO L82 PathProgramCache]: Analyzing trace with hash 1041867770, now seen corresponding path program 1 times [2020-09-15 13:20:03,662 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:20:03,662 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52781138] [2020-09-15 13:20:03,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:20:03,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:20:03,748 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-09-15 13:20:03,748 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52781138] [2020-09-15 13:20:03,749 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139253542] [2020-09-15 13:20:03,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:20:03,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:20:03,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-15 13:20:03,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:20:03,989 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-09-15 13:20:03,990 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:20:03,990 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-09-15 13:20:03,991 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760784292] [2020-09-15 13:20:03,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-15 13:20:03,991 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:20:03,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-15 13:20:03,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-09-15 13:20:03,992 INFO L87 Difference]: Start difference. First operand 33981 states and 181710 transitions. Second operand 12 states. [2020-09-15 13:20:05,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:20:05,218 INFO L93 Difference]: Finished difference Result 82728 states and 398553 transitions. [2020-09-15 13:20:05,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-15 13:20:05,219 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2020-09-15 13:20:05,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:20:05,692 INFO L225 Difference]: With dead ends: 82728 [2020-09-15 13:20:05,693 INFO L226 Difference]: Without dead ends: 82673 [2020-09-15 13:20:05,693 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=260, Unknown=0, NotChecked=0, Total=380 [2020-09-15 13:20:07,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82673 states. [2020-09-15 13:20:09,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82673 to 34821. [2020-09-15 13:20:09,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34821 states. [2020-09-15 13:20:09,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34821 states to 34821 states and 186422 transitions. [2020-09-15 13:20:09,462 INFO L78 Accepts]: Start accepts. Automaton has 34821 states and 186422 transitions. Word has length 23 [2020-09-15 13:20:09,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:20:09,462 INFO L479 AbstractCegarLoop]: Abstraction has 34821 states and 186422 transitions. [2020-09-15 13:20:09,462 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-15 13:20:09,462 INFO L276 IsEmpty]: Start isEmpty. Operand 34821 states and 186422 transitions. [2020-09-15 13:20:09,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-15 13:20:09,465 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:20:09,465 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:20:09,666 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:20:09,666 INFO L427 AbstractCegarLoop]: === Iteration 21 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:20:09,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:20:09,667 INFO L82 PathProgramCache]: Analyzing trace with hash -284839030, now seen corresponding path program 2 times [2020-09-15 13:20:09,668 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:20:09,668 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937550075] [2020-09-15 13:20:09,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:20:09,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:20:09,752 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-09-15 13:20:09,752 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937550075] [2020-09-15 13:20:09,753 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 13:20:09,753 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-15 13:20:09,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71761023] [2020-09-15 13:20:09,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-15 13:20:09,754 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:20:09,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-15 13:20:09,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-15 13:20:09,754 INFO L87 Difference]: Start difference. First operand 34821 states and 186422 transitions. Second operand 7 states. [2020-09-15 13:20:10,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:20:10,935 INFO L93 Difference]: Finished difference Result 83507 states and 402693 transitions. [2020-09-15 13:20:10,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-15 13:20:10,936 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2020-09-15 13:20:10,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:20:11,389 INFO L225 Difference]: With dead ends: 83507 [2020-09-15 13:20:11,390 INFO L226 Difference]: Without dead ends: 83452 [2020-09-15 13:20:11,390 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-09-15 13:20:13,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83452 states. [2020-09-15 13:20:14,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83452 to 35694. [2020-09-15 13:20:14,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35694 states. [2020-09-15 13:20:15,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35694 states to 35694 states and 191145 transitions. [2020-09-15 13:20:15,003 INFO L78 Accepts]: Start accepts. Automaton has 35694 states and 191145 transitions. Word has length 23 [2020-09-15 13:20:15,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:20:15,003 INFO L479 AbstractCegarLoop]: Abstraction has 35694 states and 191145 transitions. [2020-09-15 13:20:15,003 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-15 13:20:15,003 INFO L276 IsEmpty]: Start isEmpty. Operand 35694 states and 191145 transitions. [2020-09-15 13:20:15,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-15 13:20:15,006 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:20:15,006 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:20:15,006 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2020-09-15 13:20:15,006 INFO L427 AbstractCegarLoop]: === Iteration 22 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:20:15,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:20:15,007 INFO L82 PathProgramCache]: Analyzing trace with hash -284850438, now seen corresponding path program 2 times [2020-09-15 13:20:15,007 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:20:15,007 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071704346] [2020-09-15 13:20:15,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:20:15,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:20:15,086 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-09-15 13:20:15,087 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071704346] [2020-09-15 13:20:15,087 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 13:20:15,087 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-15 13:20:15,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325133447] [2020-09-15 13:20:15,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-15 13:20:15,088 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:20:15,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-15 13:20:15,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-15 13:20:15,089 INFO L87 Difference]: Start difference. First operand 35694 states and 191145 transitions. Second operand 7 states. [2020-09-15 13:20:16,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:20:16,339 INFO L93 Difference]: Finished difference Result 83523 states and 402462 transitions. [2020-09-15 13:20:16,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-15 13:20:16,340 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2020-09-15 13:20:16,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:20:16,778 INFO L225 Difference]: With dead ends: 83523 [2020-09-15 13:20:16,779 INFO L226 Difference]: Without dead ends: 83468 [2020-09-15 13:20:16,779 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-09-15 13:20:18,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83468 states. [2020-09-15 13:20:20,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83468 to 36306. [2020-09-15 13:20:20,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36306 states. [2020-09-15 13:20:20,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36306 states to 36306 states and 194552 transitions. [2020-09-15 13:20:20,503 INFO L78 Accepts]: Start accepts. Automaton has 36306 states and 194552 transitions. Word has length 23 [2020-09-15 13:20:20,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:20:20,504 INFO L479 AbstractCegarLoop]: Abstraction has 36306 states and 194552 transitions. [2020-09-15 13:20:20,504 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-15 13:20:20,504 INFO L276 IsEmpty]: Start isEmpty. Operand 36306 states and 194552 transitions. [2020-09-15 13:20:20,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-15 13:20:20,507 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:20:20,507 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:20:20,507 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2020-09-15 13:20:20,508 INFO L427 AbstractCegarLoop]: === Iteration 23 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:20:20,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:20:20,508 INFO L82 PathProgramCache]: Analyzing trace with hash -284866837, now seen corresponding path program 2 times [2020-09-15 13:20:20,508 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:20:20,508 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174345440] [2020-09-15 13:20:20,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:20:20,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:20:20,589 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-09-15 13:20:20,589 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174345440] [2020-09-15 13:20:20,589 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 13:20:20,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-15 13:20:20,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125478879] [2020-09-15 13:20:20,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-15 13:20:20,590 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:20:20,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-15 13:20:20,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-15 13:20:20,591 INFO L87 Difference]: Start difference. First operand 36306 states and 194552 transitions. Second operand 7 states. [2020-09-15 13:20:21,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:20:21,786 INFO L93 Difference]: Finished difference Result 83918 states and 404136 transitions. [2020-09-15 13:20:21,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-15 13:20:21,787 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2020-09-15 13:20:21,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:20:22,245 INFO L225 Difference]: With dead ends: 83918 [2020-09-15 13:20:22,245 INFO L226 Difference]: Without dead ends: 83863 [2020-09-15 13:20:22,246 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-09-15 13:20:24,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83863 states. [2020-09-15 13:20:25,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83863 to 37062. [2020-09-15 13:20:25,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37062 states. [2020-09-15 13:20:25,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37062 states to 37062 states and 198528 transitions. [2020-09-15 13:20:25,954 INFO L78 Accepts]: Start accepts. Automaton has 37062 states and 198528 transitions. Word has length 23 [2020-09-15 13:20:25,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:20:25,954 INFO L479 AbstractCegarLoop]: Abstraction has 37062 states and 198528 transitions. [2020-09-15 13:20:25,954 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-15 13:20:25,954 INFO L276 IsEmpty]: Start isEmpty. Operand 37062 states and 198528 transitions. [2020-09-15 13:20:25,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-15 13:20:25,959 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:20:25,959 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:20:25,960 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2020-09-15 13:20:25,960 INFO L427 AbstractCegarLoop]: === Iteration 24 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:20:25,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:20:25,960 INFO L82 PathProgramCache]: Analyzing trace with hash -1146013160, now seen corresponding path program 1 times [2020-09-15 13:20:25,960 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:20:25,960 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518437031] [2020-09-15 13:20:25,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:20:25,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:20:26,072 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-15 13:20:26,073 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518437031] [2020-09-15 13:20:26,073 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469739198] [2020-09-15 13:20:26,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:20:26,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:20:26,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 13:20:26,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:20:26,366 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-15 13:20:26,366 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:20:26,367 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-09-15 13:20:26,367 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159681996] [2020-09-15 13:20:26,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-15 13:20:26,367 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:20:26,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-15 13:20:26,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2020-09-15 13:20:26,368 INFO L87 Difference]: Start difference. First operand 37062 states and 198528 transitions. Second operand 16 states. [2020-09-15 13:20:30,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:20:30,047 INFO L93 Difference]: Finished difference Result 122892 states and 561130 transitions. [2020-09-15 13:20:30,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 13:20:30,048 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 25 [2020-09-15 13:20:30,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:20:30,717 INFO L225 Difference]: With dead ends: 122892 [2020-09-15 13:20:30,718 INFO L226 Difference]: Without dead ends: 122862 [2020-09-15 13:20:30,718 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=394, Invalid=1088, Unknown=0, NotChecked=0, Total=1482 [2020-09-15 13:20:32,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122862 states. [2020-09-15 13:20:34,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122862 to 36727. [2020-09-15 13:20:34,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36727 states. [2020-09-15 13:20:39,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36727 states to 36727 states and 196466 transitions. [2020-09-15 13:20:39,291 INFO L78 Accepts]: Start accepts. Automaton has 36727 states and 196466 transitions. Word has length 25 [2020-09-15 13:20:39,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:20:39,291 INFO L479 AbstractCegarLoop]: Abstraction has 36727 states and 196466 transitions. [2020-09-15 13:20:39,291 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-15 13:20:39,291 INFO L276 IsEmpty]: Start isEmpty. Operand 36727 states and 196466 transitions. [2020-09-15 13:20:39,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-15 13:20:39,295 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:20:39,295 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:20:39,496 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2020-09-15 13:20:39,496 INFO L427 AbstractCegarLoop]: === Iteration 25 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:20:39,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:20:39,497 INFO L82 PathProgramCache]: Analyzing trace with hash -872185784, now seen corresponding path program 1 times [2020-09-15 13:20:39,497 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:20:39,498 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013831037] [2020-09-15 13:20:39,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:20:39,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:20:39,611 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-15 13:20:39,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013831037] [2020-09-15 13:20:39,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430361601] [2020-09-15 13:20:39,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:20:39,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:20:39,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 13:20:39,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:20:39,911 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-15 13:20:39,912 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:20:39,912 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-09-15 13:20:39,912 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952475365] [2020-09-15 13:20:39,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-15 13:20:39,913 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:20:39,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-15 13:20:39,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2020-09-15 13:20:39,914 INFO L87 Difference]: Start difference. First operand 36727 states and 196466 transitions. Second operand 16 states. [2020-09-15 13:20:42,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:20:42,708 INFO L93 Difference]: Finished difference Result 121590 states and 554657 transitions. [2020-09-15 13:20:42,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 13:20:42,709 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 25 [2020-09-15 13:20:42,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:20:43,304 INFO L225 Difference]: With dead ends: 121590 [2020-09-15 13:20:43,304 INFO L226 Difference]: Without dead ends: 121560 [2020-09-15 13:20:43,305 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=394, Invalid=1088, Unknown=0, NotChecked=0, Total=1482 [2020-09-15 13:20:44,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121560 states. [2020-09-15 13:20:47,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121560 to 36513. [2020-09-15 13:20:47,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36513 states. [2020-09-15 13:20:47,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36513 states to 36513 states and 195090 transitions. [2020-09-15 13:20:47,493 INFO L78 Accepts]: Start accepts. Automaton has 36513 states and 195090 transitions. Word has length 25 [2020-09-15 13:20:47,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:20:47,494 INFO L479 AbstractCegarLoop]: Abstraction has 36513 states and 195090 transitions. [2020-09-15 13:20:47,494 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-15 13:20:47,494 INFO L276 IsEmpty]: Start isEmpty. Operand 36513 states and 195090 transitions. [2020-09-15 13:20:47,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-15 13:20:47,498 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:20:47,498 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:20:47,705 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:20:47,706 INFO L427 AbstractCegarLoop]: === Iteration 26 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:20:47,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:20:47,706 INFO L82 PathProgramCache]: Analyzing trace with hash 2096074712, now seen corresponding path program 2 times [2020-09-15 13:20:47,707 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:20:47,707 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315637183] [2020-09-15 13:20:47,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:20:47,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:20:47,822 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-15 13:20:47,823 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315637183] [2020-09-15 13:20:47,823 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544894885] [2020-09-15 13:20:47,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:20:47,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 13:20:47,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:20:47,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 13:20:47,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:20:48,091 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-15 13:20:48,092 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:20:48,092 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-09-15 13:20:48,092 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954040961] [2020-09-15 13:20:48,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-15 13:20:48,093 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:20:48,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-15 13:20:48,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2020-09-15 13:20:48,093 INFO L87 Difference]: Start difference. First operand 36513 states and 195090 transitions. Second operand 16 states. [2020-09-15 13:20:50,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:20:50,380 INFO L93 Difference]: Finished difference Result 120395 states and 548664 transitions. [2020-09-15 13:20:50,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 13:20:50,382 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 25 [2020-09-15 13:20:50,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:20:52,265 INFO L225 Difference]: With dead ends: 120395 [2020-09-15 13:20:52,265 INFO L226 Difference]: Without dead ends: 120362 [2020-09-15 13:20:52,266 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=394, Invalid=1088, Unknown=0, NotChecked=0, Total=1482 [2020-09-15 13:20:53,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120362 states. [2020-09-15 13:20:55,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120362 to 36444. [2020-09-15 13:20:55,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36444 states. [2020-09-15 13:20:55,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36444 states to 36444 states and 194571 transitions. [2020-09-15 13:20:55,569 INFO L78 Accepts]: Start accepts. Automaton has 36444 states and 194571 transitions. Word has length 25 [2020-09-15 13:20:55,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:20:55,569 INFO L479 AbstractCegarLoop]: Abstraction has 36444 states and 194571 transitions. [2020-09-15 13:20:55,569 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-15 13:20:55,570 INFO L276 IsEmpty]: Start isEmpty. Operand 36444 states and 194571 transitions. [2020-09-15 13:20:55,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-15 13:20:55,574 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:20:55,574 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:20:55,774 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2020-09-15 13:20:55,775 INFO L427 AbstractCegarLoop]: === Iteration 27 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:20:55,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:20:55,776 INFO L82 PathProgramCache]: Analyzing trace with hash 2096063304, now seen corresponding path program 2 times [2020-09-15 13:20:55,776 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:20:55,776 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950750410] [2020-09-15 13:20:55,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:20:55,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:20:55,878 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-15 13:20:55,878 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950750410] [2020-09-15 13:20:55,879 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948199652] [2020-09-15 13:20:55,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:20:56,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 13:20:56,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:20:56,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 13:20:56,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:20:56,142 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-15 13:20:56,143 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:20:56,143 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-09-15 13:20:56,143 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369282820] [2020-09-15 13:20:56,143 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-15 13:20:56,144 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:20:56,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-15 13:20:56,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2020-09-15 13:20:56,144 INFO L87 Difference]: Start difference. First operand 36444 states and 194571 transitions. Second operand 16 states. [2020-09-15 13:20:58,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:20:58,858 INFO L93 Difference]: Finished difference Result 119346 states and 543724 transitions. [2020-09-15 13:20:58,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 13:20:58,859 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 25 [2020-09-15 13:20:58,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:20:59,400 INFO L225 Difference]: With dead ends: 119346 [2020-09-15 13:20:59,400 INFO L226 Difference]: Without dead ends: 119313 [2020-09-15 13:20:59,401 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=394, Invalid=1088, Unknown=0, NotChecked=0, Total=1482 [2020-09-15 13:21:00,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119313 states. [2020-09-15 13:21:06,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119313 to 36040. [2020-09-15 13:21:06,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36040 states. [2020-09-15 13:21:06,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36040 states to 36040 states and 192287 transitions. [2020-09-15 13:21:06,208 INFO L78 Accepts]: Start accepts. Automaton has 36040 states and 192287 transitions. Word has length 25 [2020-09-15 13:21:06,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:21:06,208 INFO L479 AbstractCegarLoop]: Abstraction has 36040 states and 192287 transitions. [2020-09-15 13:21:06,208 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-15 13:21:06,208 INFO L276 IsEmpty]: Start isEmpty. Operand 36040 states and 192287 transitions. [2020-09-15 13:21:06,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-15 13:21:06,211 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:21:06,211 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:21:06,412 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2020-09-15 13:21:06,412 INFO L427 AbstractCegarLoop]: === Iteration 28 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:21:06,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:21:06,413 INFO L82 PathProgramCache]: Analyzing trace with hash 582269272, now seen corresponding path program 3 times [2020-09-15 13:21:06,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:21:06,414 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532489796] [2020-09-15 13:21:06,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:21:06,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:21:06,513 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-09-15 13:21:06,513 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532489796] [2020-09-15 13:21:06,514 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402659598] [2020-09-15 13:21:06,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:21:06,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-15 13:21:06,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:21:06,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 13:21:06,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:21:06,777 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-09-15 13:21:06,777 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:21:06,778 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-09-15 13:21:06,778 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080623170] [2020-09-15 13:21:06,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-15 13:21:06,778 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:21:06,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-15 13:21:06,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2020-09-15 13:21:06,779 INFO L87 Difference]: Start difference. First operand 36040 states and 192287 transitions. Second operand 16 states. [2020-09-15 13:21:09,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:21:09,143 INFO L93 Difference]: Finished difference Result 119770 states and 545635 transitions. [2020-09-15 13:21:09,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 13:21:09,144 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 25 [2020-09-15 13:21:09,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:21:09,679 INFO L225 Difference]: With dead ends: 119770 [2020-09-15 13:21:09,679 INFO L226 Difference]: Without dead ends: 119740 [2020-09-15 13:21:09,680 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=394, Invalid=1088, Unknown=0, NotChecked=0, Total=1482 [2020-09-15 13:21:12,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119740 states. [2020-09-15 13:21:13,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119740 to 35471. [2020-09-15 13:21:13,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35471 states. [2020-09-15 13:21:13,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35471 states to 35471 states and 189238 transitions. [2020-09-15 13:21:13,923 INFO L78 Accepts]: Start accepts. Automaton has 35471 states and 189238 transitions. Word has length 25 [2020-09-15 13:21:13,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:21:13,924 INFO L479 AbstractCegarLoop]: Abstraction has 35471 states and 189238 transitions. [2020-09-15 13:21:13,924 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-15 13:21:13,924 INFO L276 IsEmpty]: Start isEmpty. Operand 35471 states and 189238 transitions. [2020-09-15 13:21:13,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-15 13:21:13,926 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:21:13,926 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:21:14,136 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2020-09-15 13:21:14,137 INFO L427 AbstractCegarLoop]: === Iteration 29 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:21:14,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:21:14,138 INFO L82 PathProgramCache]: Analyzing trace with hash 679178599, now seen corresponding path program 1 times [2020-09-15 13:21:14,138 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:21:14,138 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210322609] [2020-09-15 13:21:14,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:21:14,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:21:14,246 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-15 13:21:14,247 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210322609] [2020-09-15 13:21:14,247 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564166188] [2020-09-15 13:21:14,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:21:14,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:21:14,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 13:21:14,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:21:14,479 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-15 13:21:14,480 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:21:14,480 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-09-15 13:21:14,480 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526449956] [2020-09-15 13:21:14,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-15 13:21:14,480 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:21:14,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-15 13:21:14,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2020-09-15 13:21:14,481 INFO L87 Difference]: Start difference. First operand 35471 states and 189238 transitions. Second operand 16 states. [2020-09-15 13:21:17,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:21:17,638 INFO L93 Difference]: Finished difference Result 121131 states and 553230 transitions. [2020-09-15 13:21:17,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 13:21:17,639 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 25 [2020-09-15 13:21:17,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:21:18,231 INFO L225 Difference]: With dead ends: 121131 [2020-09-15 13:21:18,231 INFO L226 Difference]: Without dead ends: 121101 [2020-09-15 13:21:18,232 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=394, Invalid=1088, Unknown=0, NotChecked=0, Total=1482 [2020-09-15 13:21:19,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121101 states. [2020-09-15 13:21:25,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121101 to 35374. [2020-09-15 13:21:25,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35374 states. [2020-09-15 13:21:25,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35374 states to 35374 states and 188534 transitions. [2020-09-15 13:21:25,274 INFO L78 Accepts]: Start accepts. Automaton has 35374 states and 188534 transitions. Word has length 25 [2020-09-15 13:21:25,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:21:25,274 INFO L479 AbstractCegarLoop]: Abstraction has 35374 states and 188534 transitions. [2020-09-15 13:21:25,274 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-15 13:21:25,274 INFO L276 IsEmpty]: Start isEmpty. Operand 35374 states and 188534 transitions. [2020-09-15 13:21:25,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-15 13:21:25,277 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:21:25,277 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:21:25,478 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2020-09-15 13:21:25,478 INFO L427 AbstractCegarLoop]: === Iteration 30 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:21:25,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:21:25,479 INFO L82 PathProgramCache]: Analyzing trace with hash -647539609, now seen corresponding path program 2 times [2020-09-15 13:21:25,479 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:21:25,480 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357405075] [2020-09-15 13:21:25,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:21:25,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:21:25,584 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-09-15 13:21:25,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357405075] [2020-09-15 13:21:25,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520328739] [2020-09-15 13:21:25,585 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:21:25,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 13:21:25,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:21:25,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 13:21:25,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:21:25,854 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-09-15 13:21:25,854 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:21:25,855 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-09-15 13:21:25,855 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275231017] [2020-09-15 13:21:25,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-15 13:21:25,855 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:21:25,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-15 13:21:25,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2020-09-15 13:21:25,856 INFO L87 Difference]: Start difference. First operand 35374 states and 188534 transitions. Second operand 16 states. [2020-09-15 13:21:28,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:21:28,162 INFO L93 Difference]: Finished difference Result 120194 states and 548412 transitions. [2020-09-15 13:21:28,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 13:21:28,164 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 25 [2020-09-15 13:21:28,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:21:28,760 INFO L225 Difference]: With dead ends: 120194 [2020-09-15 13:21:28,760 INFO L226 Difference]: Without dead ends: 120154 [2020-09-15 13:21:28,761 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=394, Invalid=1088, Unknown=0, NotChecked=0, Total=1482 [2020-09-15 13:21:31,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120154 states. [2020-09-15 13:21:32,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120154 to 35219. [2020-09-15 13:21:32,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35219 states. [2020-09-15 13:21:32,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35219 states to 35219 states and 187630 transitions. [2020-09-15 13:21:32,990 INFO L78 Accepts]: Start accepts. Automaton has 35219 states and 187630 transitions. Word has length 25 [2020-09-15 13:21:32,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:21:32,991 INFO L479 AbstractCegarLoop]: Abstraction has 35219 states and 187630 transitions. [2020-09-15 13:21:32,991 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-15 13:21:32,991 INFO L276 IsEmpty]: Start isEmpty. Operand 35219 states and 187630 transitions. [2020-09-15 13:21:32,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-15 13:21:32,994 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:21:32,994 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:21:33,195 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:21:33,195 INFO L427 AbstractCegarLoop]: === Iteration 31 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:21:33,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:21:33,196 INFO L82 PathProgramCache]: Analyzing trace with hash -647556008, now seen corresponding path program 4 times [2020-09-15 13:21:33,196 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:21:33,197 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031543583] [2020-09-15 13:21:33,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:21:33,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:21:33,307 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-09-15 13:21:33,307 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031543583] [2020-09-15 13:21:33,307 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602241601] [2020-09-15 13:21:33,308 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:21:33,436 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 13:21:33,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:21:33,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 13:21:33,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:21:33,591 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-09-15 13:21:33,592 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:21:33,592 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-09-15 13:21:33,592 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262751454] [2020-09-15 13:21:33,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-15 13:21:33,593 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:21:33,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-15 13:21:33,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2020-09-15 13:21:33,594 INFO L87 Difference]: Start difference. First operand 35219 states and 187630 transitions. Second operand 16 states. [2020-09-15 13:21:36,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:21:36,934 INFO L93 Difference]: Finished difference Result 118559 states and 539905 transitions. [2020-09-15 13:21:36,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 13:21:36,935 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 25 [2020-09-15 13:21:36,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:21:37,495 INFO L225 Difference]: With dead ends: 118559 [2020-09-15 13:21:37,495 INFO L226 Difference]: Without dead ends: 118526 [2020-09-15 13:21:37,496 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=394, Invalid=1088, Unknown=0, NotChecked=0, Total=1482 [2020-09-15 13:21:38,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118526 states. [2020-09-15 13:21:40,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118526 to 34815. [2020-09-15 13:21:40,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34815 states. [2020-09-15 13:21:40,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34815 states to 34815 states and 185346 transitions. [2020-09-15 13:21:40,748 INFO L78 Accepts]: Start accepts. Automaton has 34815 states and 185346 transitions. Word has length 25 [2020-09-15 13:21:40,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:21:40,748 INFO L479 AbstractCegarLoop]: Abstraction has 34815 states and 185346 transitions. [2020-09-15 13:21:40,748 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-15 13:21:40,748 INFO L276 IsEmpty]: Start isEmpty. Operand 34815 states and 185346 transitions. [2020-09-15 13:21:40,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-15 13:21:40,752 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:21:40,752 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:21:40,959 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2020-09-15 13:21:40,960 INFO L427 AbstractCegarLoop]: === Iteration 32 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:21:40,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:21:40,960 INFO L82 PathProgramCache]: Analyzing trace with hash -1056609241, now seen corresponding path program 3 times [2020-09-15 13:21:40,961 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:21:40,961 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042772758] [2020-09-15 13:21:40,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:21:40,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:21:41,070 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-09-15 13:21:41,071 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042772758] [2020-09-15 13:21:41,072 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835679691] [2020-09-15 13:21:41,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:21:43,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-15 13:21:43,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:21:43,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 13:21:43,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:21:43,696 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-09-15 13:21:43,696 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:21:43,696 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-09-15 13:21:43,697 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098154864] [2020-09-15 13:21:43,697 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-15 13:21:43,697 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:21:43,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-15 13:21:43,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2020-09-15 13:21:43,697 INFO L87 Difference]: Start difference. First operand 34815 states and 185346 transitions. Second operand 16 states. [2020-09-15 13:21:45,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:21:45,811 INFO L93 Difference]: Finished difference Result 118955 states and 542533 transitions. [2020-09-15 13:21:45,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 13:21:45,812 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 25 [2020-09-15 13:21:45,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:21:46,375 INFO L225 Difference]: With dead ends: 118955 [2020-09-15 13:21:46,375 INFO L226 Difference]: Without dead ends: 118925 [2020-09-15 13:21:46,376 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=394, Invalid=1088, Unknown=0, NotChecked=0, Total=1482 [2020-09-15 13:21:47,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118925 states. [2020-09-15 13:21:50,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118925 to 34363. [2020-09-15 13:21:50,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34363 states. [2020-09-15 13:21:50,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34363 states to 34363 states and 182968 transitions. [2020-09-15 13:21:50,435 INFO L78 Accepts]: Start accepts. Automaton has 34363 states and 182968 transitions. Word has length 25 [2020-09-15 13:21:50,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:21:50,435 INFO L479 AbstractCegarLoop]: Abstraction has 34363 states and 182968 transitions. [2020-09-15 13:21:50,435 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-15 13:21:50,436 INFO L276 IsEmpty]: Start isEmpty. Operand 34363 states and 182968 transitions. [2020-09-15 13:21:50,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-15 13:21:50,440 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:21:50,440 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:21:50,640 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2020-09-15 13:21:50,641 INFO L427 AbstractCegarLoop]: === Iteration 33 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:21:50,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:21:50,642 INFO L82 PathProgramCache]: Analyzing trace with hash -989383992, now seen corresponding path program 3 times [2020-09-15 13:21:50,642 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:21:50,643 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962418567] [2020-09-15 13:21:50,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:21:50,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:21:50,767 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-09-15 13:21:50,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962418567] [2020-09-15 13:21:50,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450433149] [2020-09-15 13:21:50,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:21:50,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-15 13:21:50,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:21:50,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 13:21:50,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:21:51,004 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-09-15 13:21:51,005 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:21:51,005 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-09-15 13:21:51,005 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070491757] [2020-09-15 13:21:51,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-15 13:21:51,006 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:21:51,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-15 13:21:51,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2020-09-15 13:21:51,007 INFO L87 Difference]: Start difference. First operand 34363 states and 182968 transitions. Second operand 16 states. [2020-09-15 13:21:53,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:21:53,459 INFO L93 Difference]: Finished difference Result 117996 states and 537739 transitions. [2020-09-15 13:21:53,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 13:21:53,460 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 25 [2020-09-15 13:21:53,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:21:54,024 INFO L225 Difference]: With dead ends: 117996 [2020-09-15 13:21:54,024 INFO L226 Difference]: Without dead ends: 117966 [2020-09-15 13:21:54,025 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=394, Invalid=1088, Unknown=0, NotChecked=0, Total=1482 [2020-09-15 13:21:56,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117966 states. [2020-09-15 13:21:57,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117966 to 34024. [2020-09-15 13:21:57,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34024 states. [2020-09-15 13:21:58,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34024 states to 34024 states and 181250 transitions. [2020-09-15 13:21:58,059 INFO L78 Accepts]: Start accepts. Automaton has 34024 states and 181250 transitions. Word has length 25 [2020-09-15 13:21:58,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:21:58,059 INFO L479 AbstractCegarLoop]: Abstraction has 34024 states and 181250 transitions. [2020-09-15 13:21:58,059 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-15 13:21:58,059 INFO L276 IsEmpty]: Start isEmpty. Operand 34024 states and 181250 transitions. [2020-09-15 13:21:58,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-15 13:21:58,063 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:21:58,063 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:21:58,263 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2020-09-15 13:21:58,264 INFO L427 AbstractCegarLoop]: === Iteration 34 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:21:58,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:21:58,264 INFO L82 PathProgramCache]: Analyzing trace with hash 507575079, now seen corresponding path program 4 times [2020-09-15 13:21:58,265 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:21:58,265 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208844322] [2020-09-15 13:21:58,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:21:58,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:21:58,375 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-09-15 13:21:58,375 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208844322] [2020-09-15 13:21:58,375 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184686209] [2020-09-15 13:21:58,376 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:21:58,502 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 13:21:58,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:21:58,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 13:21:58,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:21:58,659 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-09-15 13:21:58,660 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:21:58,660 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-09-15 13:21:58,660 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016214725] [2020-09-15 13:21:58,661 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-15 13:21:58,661 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:21:58,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-15 13:21:58,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2020-09-15 13:21:58,661 INFO L87 Difference]: Start difference. First operand 34024 states and 181250 transitions. Second operand 16 states. [2020-09-15 13:22:01,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:22:01,486 INFO L93 Difference]: Finished difference Result 119076 states and 543105 transitions. [2020-09-15 13:22:01,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 13:22:01,488 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 25 [2020-09-15 13:22:01,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:22:02,094 INFO L225 Difference]: With dead ends: 119076 [2020-09-15 13:22:02,094 INFO L226 Difference]: Without dead ends: 119036 [2020-09-15 13:22:02,095 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=394, Invalid=1088, Unknown=0, NotChecked=0, Total=1482 [2020-09-15 13:22:03,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119036 states. [2020-09-15 13:22:05,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119036 to 33873. [2020-09-15 13:22:05,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33873 states. [2020-09-15 13:22:05,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33873 states to 33873 states and 180354 transitions. [2020-09-15 13:22:05,664 INFO L78 Accepts]: Start accepts. Automaton has 33873 states and 180354 transitions. Word has length 25 [2020-09-15 13:22:05,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:22:05,664 INFO L479 AbstractCegarLoop]: Abstraction has 33873 states and 180354 transitions. [2020-09-15 13:22:05,664 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-15 13:22:05,665 INFO L276 IsEmpty]: Start isEmpty. Operand 33873 states and 180354 transitions. [2020-09-15 13:22:05,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-15 13:22:05,667 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:22:05,667 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:22:05,867 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2020-09-15 13:22:05,868 INFO L427 AbstractCegarLoop]: === Iteration 35 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:22:05,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:22:05,869 INFO L82 PathProgramCache]: Analyzing trace with hash 507547272, now seen corresponding path program 4 times [2020-09-15 13:22:05,869 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:22:05,869 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099058559] [2020-09-15 13:22:05,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:22:05,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:22:05,965 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-09-15 13:22:05,966 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099058559] [2020-09-15 13:22:05,966 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204838760] [2020-09-15 13:22:05,966 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:22:06,092 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 13:22:06,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:22:06,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 13:22:06,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:22:06,231 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-09-15 13:22:06,231 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:22:06,231 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-09-15 13:22:06,231 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102750891] [2020-09-15 13:22:06,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-15 13:22:06,232 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:22:06,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-15 13:22:06,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2020-09-15 13:22:06,232 INFO L87 Difference]: Start difference. First operand 33873 states and 180354 transitions. Second operand 16 states. [2020-09-15 13:22:08,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:22:08,330 INFO L93 Difference]: Finished difference Result 118020 states and 538147 transitions. [2020-09-15 13:22:08,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 13:22:08,331 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 25 [2020-09-15 13:22:08,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:22:08,717 INFO L225 Difference]: With dead ends: 118020 [2020-09-15 13:22:08,718 INFO L226 Difference]: Without dead ends: 117980 [2020-09-15 13:22:08,718 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=394, Invalid=1088, Unknown=0, NotChecked=0, Total=1482 [2020-09-15 13:22:13,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117980 states. [2020-09-15 13:22:14,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117980 to 33387. [2020-09-15 13:22:14,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33387 states. [2020-09-15 13:22:14,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33387 states to 33387 states and 177693 transitions. [2020-09-15 13:22:14,463 INFO L78 Accepts]: Start accepts. Automaton has 33387 states and 177693 transitions. Word has length 25 [2020-09-15 13:22:14,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:22:14,464 INFO L479 AbstractCegarLoop]: Abstraction has 33387 states and 177693 transitions. [2020-09-15 13:22:14,464 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-15 13:22:14,464 INFO L276 IsEmpty]: Start isEmpty. Operand 33387 states and 177693 transitions. [2020-09-15 13:22:14,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-15 13:22:14,466 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:22:14,466 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:22:14,667 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:22:14,667 INFO L427 AbstractCegarLoop]: === Iteration 36 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:22:14,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:22:14,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1147615783, now seen corresponding path program 5 times [2020-09-15 13:22:14,668 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:22:14,669 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677298120] [2020-09-15 13:22:14,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:22:14,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:22:14,768 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-09-15 13:22:14,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677298120] [2020-09-15 13:22:14,769 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 13:22:14,769 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-15 13:22:14,770 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936953735] [2020-09-15 13:22:14,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-15 13:22:14,770 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:22:14,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-15 13:22:14,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-09-15 13:22:14,771 INFO L87 Difference]: Start difference. First operand 33387 states and 177693 transitions. Second operand 9 states. [2020-09-15 13:22:16,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:22:16,645 INFO L93 Difference]: Finished difference Result 118363 states and 539792 transitions. [2020-09-15 13:22:16,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 13:22:16,646 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-09-15 13:22:16,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:22:17,836 INFO L225 Difference]: With dead ends: 118363 [2020-09-15 13:22:17,836 INFO L226 Difference]: Without dead ends: 118333 [2020-09-15 13:22:17,837 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=264, Invalid=728, Unknown=0, NotChecked=0, Total=992 [2020-09-15 13:22:18,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118333 states. [2020-09-15 13:22:20,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118333 to 32908. [2020-09-15 13:22:20,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32908 states. [2020-09-15 13:22:20,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32908 states to 32908 states and 175152 transitions. [2020-09-15 13:22:20,398 INFO L78 Accepts]: Start accepts. Automaton has 32908 states and 175152 transitions. Word has length 25 [2020-09-15 13:22:20,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:22:20,398 INFO L479 AbstractCegarLoop]: Abstraction has 32908 states and 175152 transitions. [2020-09-15 13:22:20,398 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-15 13:22:20,398 INFO L276 IsEmpty]: Start isEmpty. Operand 32908 states and 175152 transitions. [2020-09-15 13:22:20,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-15 13:22:20,401 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:22:20,401 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:22:20,401 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2020-09-15 13:22:20,401 INFO L427 AbstractCegarLoop]: === Iteration 37 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:22:20,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:22:20,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1147599384, now seen corresponding path program 5 times [2020-09-15 13:22:20,401 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:22:20,402 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680961161] [2020-09-15 13:22:20,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:22:20,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:22:20,498 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-09-15 13:22:20,498 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680961161] [2020-09-15 13:22:20,498 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 13:22:20,498 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-15 13:22:20,498 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382241801] [2020-09-15 13:22:20,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-15 13:22:20,499 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:22:20,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-15 13:22:20,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-09-15 13:22:20,499 INFO L87 Difference]: Start difference. First operand 32908 states and 175152 transitions. Second operand 9 states. [2020-09-15 13:22:22,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:22:22,788 INFO L93 Difference]: Finished difference Result 117027 states and 533313 transitions. [2020-09-15 13:22:22,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 13:22:22,789 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-09-15 13:22:22,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:22:23,156 INFO L225 Difference]: With dead ends: 117027 [2020-09-15 13:22:23,157 INFO L226 Difference]: Without dead ends: 116997 [2020-09-15 13:22:23,157 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=264, Invalid=728, Unknown=0, NotChecked=0, Total=992 [2020-09-15 13:22:24,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116997 states. [2020-09-15 13:22:28,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116997 to 32394. [2020-09-15 13:22:28,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32394 states. [2020-09-15 13:22:28,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32394 states to 32394 states and 172458 transitions. [2020-09-15 13:22:28,579 INFO L78 Accepts]: Start accepts. Automaton has 32394 states and 172458 transitions. Word has length 25 [2020-09-15 13:22:28,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:22:28,579 INFO L479 AbstractCegarLoop]: Abstraction has 32394 states and 172458 transitions. [2020-09-15 13:22:28,579 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-15 13:22:28,579 INFO L276 IsEmpty]: Start isEmpty. Operand 32394 states and 172458 transitions. [2020-09-15 13:22:28,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-15 13:22:28,582 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:22:28,582 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:22:28,582 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2020-09-15 13:22:28,582 INFO L427 AbstractCegarLoop]: === Iteration 38 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:22:28,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:22:28,582 INFO L82 PathProgramCache]: Analyzing trace with hash 1136664103, now seen corresponding path program 6 times [2020-09-15 13:22:28,583 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:22:28,583 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421340360] [2020-09-15 13:22:28,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:22:28,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:22:28,680 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-09-15 13:22:28,680 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421340360] [2020-09-15 13:22:28,680 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 13:22:28,680 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-15 13:22:28,681 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898474768] [2020-09-15 13:22:28,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-15 13:22:28,681 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:22:28,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-15 13:22:28,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-09-15 13:22:28,681 INFO L87 Difference]: Start difference. First operand 32394 states and 172458 transitions. Second operand 9 states. [2020-09-15 13:22:30,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:22:30,288 INFO L93 Difference]: Finished difference Result 116213 states and 529114 transitions. [2020-09-15 13:22:30,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 13:22:30,289 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-09-15 13:22:30,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:22:30,645 INFO L225 Difference]: With dead ends: 116213 [2020-09-15 13:22:30,645 INFO L226 Difference]: Without dead ends: 116173 [2020-09-15 13:22:30,645 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=264, Invalid=728, Unknown=0, NotChecked=0, Total=992 [2020-09-15 13:22:32,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116173 states. [2020-09-15 13:22:33,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116173 to 31530. [2020-09-15 13:22:33,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31530 states. [2020-09-15 13:22:33,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31530 states to 31530 states and 168028 transitions. [2020-09-15 13:22:33,820 INFO L78 Accepts]: Start accepts. Automaton has 31530 states and 168028 transitions. Word has length 25 [2020-09-15 13:22:33,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:22:33,821 INFO L479 AbstractCegarLoop]: Abstraction has 31530 states and 168028 transitions. [2020-09-15 13:22:33,821 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-15 13:22:33,821 INFO L276 IsEmpty]: Start isEmpty. Operand 31530 states and 168028 transitions. [2020-09-15 13:22:33,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-15 13:22:33,824 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:22:33,824 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:22:33,825 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2020-09-15 13:22:33,825 INFO L427 AbstractCegarLoop]: === Iteration 39 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:22:33,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:22:33,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1136636296, now seen corresponding path program 5 times [2020-09-15 13:22:33,825 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:22:33,825 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282603551] [2020-09-15 13:22:33,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:22:33,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:22:33,919 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-09-15 13:22:33,919 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282603551] [2020-09-15 13:22:33,919 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 13:22:33,919 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-15 13:22:33,920 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074151050] [2020-09-15 13:22:33,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-15 13:22:33,920 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:22:33,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-15 13:22:33,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-09-15 13:22:33,920 INFO L87 Difference]: Start difference. First operand 31530 states and 168028 transitions. Second operand 9 states. [2020-09-15 13:22:35,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:22:35,676 INFO L93 Difference]: Finished difference Result 115048 states and 523573 transitions. [2020-09-15 13:22:35,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 13:22:35,677 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-09-15 13:22:35,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:22:36,908 INFO L225 Difference]: With dead ends: 115048 [2020-09-15 13:22:36,909 INFO L226 Difference]: Without dead ends: 115018 [2020-09-15 13:22:36,909 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=264, Invalid=728, Unknown=0, NotChecked=0, Total=992 [2020-09-15 13:22:38,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115018 states. [2020-09-15 13:22:39,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115018 to 31199. [2020-09-15 13:22:39,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31199 states. [2020-09-15 13:22:39,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31199 states to 31199 states and 166334 transitions. [2020-09-15 13:22:39,245 INFO L78 Accepts]: Start accepts. Automaton has 31199 states and 166334 transitions. Word has length 25 [2020-09-15 13:22:39,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:22:39,246 INFO L479 AbstractCegarLoop]: Abstraction has 31199 states and 166334 transitions. [2020-09-15 13:22:39,246 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-15 13:22:39,246 INFO L276 IsEmpty]: Start isEmpty. Operand 31199 states and 166334 transitions. [2020-09-15 13:22:39,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-15 13:22:39,248 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:22:39,248 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:22:39,248 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2020-09-15 13:22:39,249 INFO L427 AbstractCegarLoop]: === Iteration 40 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:22:39,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:22:39,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1120904664, now seen corresponding path program 6 times [2020-09-15 13:22:39,249 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:22:39,249 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298844172] [2020-09-15 13:22:39,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:22:39,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:22:39,347 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-09-15 13:22:39,348 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298844172] [2020-09-15 13:22:39,348 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 13:22:39,348 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-15 13:22:39,348 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480474578] [2020-09-15 13:22:39,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-15 13:22:39,348 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:22:39,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-15 13:22:39,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-09-15 13:22:39,349 INFO L87 Difference]: Start difference. First operand 31199 states and 166334 transitions. Second operand 9 states. [2020-09-15 13:22:41,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:22:41,261 INFO L93 Difference]: Finished difference Result 114413 states and 520399 transitions. [2020-09-15 13:22:41,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 13:22:41,262 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-09-15 13:22:41,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:22:41,622 INFO L225 Difference]: With dead ends: 114413 [2020-09-15 13:22:41,622 INFO L226 Difference]: Without dead ends: 114373 [2020-09-15 13:22:41,623 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=264, Invalid=728, Unknown=0, NotChecked=0, Total=992 [2020-09-15 13:22:42,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114373 states. [2020-09-15 13:22:46,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114373 to 30592. [2020-09-15 13:22:46,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30592 states. [2020-09-15 13:22:46,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30592 states to 30592 states and 163260 transitions. [2020-09-15 13:22:46,839 INFO L78 Accepts]: Start accepts. Automaton has 30592 states and 163260 transitions. Word has length 25 [2020-09-15 13:22:46,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:22:46,839 INFO L479 AbstractCegarLoop]: Abstraction has 30592 states and 163260 transitions. [2020-09-15 13:22:46,839 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-15 13:22:46,839 INFO L276 IsEmpty]: Start isEmpty. Operand 30592 states and 163260 transitions. [2020-09-15 13:22:46,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-15 13:22:46,841 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:22:46,842 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:22:46,842 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2020-09-15 13:22:46,842 INFO L427 AbstractCegarLoop]: === Iteration 41 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:22:46,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:22:46,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1120893256, now seen corresponding path program 6 times [2020-09-15 13:22:46,842 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:22:46,842 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932240552] [2020-09-15 13:22:46,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:22:46,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:22:46,937 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-09-15 13:22:46,937 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932240552] [2020-09-15 13:22:46,937 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 13:22:46,938 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-15 13:22:46,938 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342946182] [2020-09-15 13:22:46,938 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-15 13:22:46,938 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:22:46,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-15 13:22:46,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-09-15 13:22:46,939 INFO L87 Difference]: Start difference. First operand 30592 states and 163260 transitions. Second operand 9 states. [2020-09-15 13:22:48,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:22:48,577 INFO L93 Difference]: Finished difference Result 113466 states and 515911 transitions. [2020-09-15 13:22:48,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 13:22:48,578 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-09-15 13:22:48,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:22:48,940 INFO L225 Difference]: With dead ends: 113466 [2020-09-15 13:22:48,940 INFO L226 Difference]: Without dead ends: 113426 [2020-09-15 13:22:48,940 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=264, Invalid=728, Unknown=0, NotChecked=0, Total=992 [2020-09-15 13:22:50,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113426 states. [2020-09-15 13:22:51,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113426 to 29802. [2020-09-15 13:22:51,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29802 states. [2020-09-15 13:22:51,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29802 states to 29802 states and 159321 transitions. [2020-09-15 13:22:51,981 INFO L78 Accepts]: Start accepts. Automaton has 29802 states and 159321 transitions. Word has length 25 [2020-09-15 13:22:51,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:22:51,982 INFO L479 AbstractCegarLoop]: Abstraction has 29802 states and 159321 transitions. [2020-09-15 13:22:51,982 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-15 13:22:51,982 INFO L276 IsEmpty]: Start isEmpty. Operand 29802 states and 159321 transitions. [2020-09-15 13:22:51,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-15 13:22:51,984 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:22:51,984 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:22:51,984 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2020-09-15 13:22:51,984 INFO L427 AbstractCegarLoop]: === Iteration 42 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:22:51,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:22:51,985 INFO L82 PathProgramCache]: Analyzing trace with hash 123792641, now seen corresponding path program 1 times [2020-09-15 13:22:51,985 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:22:51,985 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123653014] [2020-09-15 13:22:51,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:22:51,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:22:52,038 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-09-15 13:22:52,038 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123653014] [2020-09-15 13:22:52,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 13:22:52,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-15 13:22:52,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058584484] [2020-09-15 13:22:52,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-15 13:22:52,039 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:22:52,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-15 13:22:52,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-15 13:22:52,040 INFO L87 Difference]: Start difference. First operand 29802 states and 159321 transitions. Second operand 5 states. [2020-09-15 13:22:52,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:22:52,518 INFO L93 Difference]: Finished difference Result 53165 states and 272731 transitions. [2020-09-15 13:22:52,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-15 13:22:52,519 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2020-09-15 13:22:52,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:22:52,700 INFO L225 Difference]: With dead ends: 53165 [2020-09-15 13:22:52,700 INFO L226 Difference]: Without dead ends: 53102 [2020-09-15 13:22:52,700 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-15 13:22:53,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53102 states. [2020-09-15 13:22:54,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53102 to 37675. [2020-09-15 13:22:54,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37675 states. [2020-09-15 13:22:54,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37675 states to 37675 states and 201015 transitions. [2020-09-15 13:22:54,929 INFO L78 Accepts]: Start accepts. Automaton has 37675 states and 201015 transitions. Word has length 25 [2020-09-15 13:22:54,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:22:54,930 INFO L479 AbstractCegarLoop]: Abstraction has 37675 states and 201015 transitions. [2020-09-15 13:22:54,930 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-15 13:22:54,930 INFO L276 IsEmpty]: Start isEmpty. Operand 37675 states and 201015 transitions. [2020-09-15 13:22:54,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-15 13:22:54,934 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:22:54,934 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:22:54,934 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2020-09-15 13:22:54,934 INFO L427 AbstractCegarLoop]: === Iteration 43 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:22:54,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:22:54,934 INFO L82 PathProgramCache]: Analyzing trace with hash -480284107, now seen corresponding path program 1 times [2020-09-15 13:22:54,935 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:22:54,935 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963975815] [2020-09-15 13:22:54,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:22:54,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:22:55,072 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:22:55,072 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963975815] [2020-09-15 13:22:55,073 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393306358] [2020-09-15 13:22:55,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:22:55,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:22:55,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 13:22:55,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:22:55,389 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:22:55,390 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:22:55,390 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2020-09-15 13:22:55,390 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968818717] [2020-09-15 13:22:55,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-15 13:22:55,391 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:22:55,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-15 13:22:55,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2020-09-15 13:22:55,391 INFO L87 Difference]: Start difference. First operand 37675 states and 201015 transitions. Second operand 20 states. [2020-09-15 13:22:59,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:22:59,342 INFO L93 Difference]: Finished difference Result 186148 states and 815009 transitions. [2020-09-15 13:22:59,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-09-15 13:22:59,343 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 27 [2020-09-15 13:22:59,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:23:00,709 INFO L225 Difference]: With dead ends: 186148 [2020-09-15 13:23:00,709 INFO L226 Difference]: Without dead ends: 186130 [2020-09-15 13:23:00,709 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1882 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1283, Invalid=4723, Unknown=0, NotChecked=0, Total=6006 [2020-09-15 13:23:02,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186130 states. [2020-09-15 13:23:07,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186130 to 37780. [2020-09-15 13:23:07,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37780 states. [2020-09-15 13:23:07,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37780 states to 37780 states and 201508 transitions. [2020-09-15 13:23:07,965 INFO L78 Accepts]: Start accepts. Automaton has 37780 states and 201508 transitions. Word has length 27 [2020-09-15 13:23:07,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:23:07,965 INFO L479 AbstractCegarLoop]: Abstraction has 37780 states and 201508 transitions. [2020-09-15 13:23:07,965 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-15 13:23:07,966 INFO L276 IsEmpty]: Start isEmpty. Operand 37780 states and 201508 transitions. [2020-09-15 13:23:07,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-15 13:23:07,970 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:23:07,970 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:23:08,183 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2020-09-15 13:23:08,184 INFO L427 AbstractCegarLoop]: === Iteration 44 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:23:08,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:23:08,184 INFO L82 PathProgramCache]: Analyzing trace with hash -1807002315, now seen corresponding path program 2 times [2020-09-15 13:23:08,185 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:23:08,185 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631364180] [2020-09-15 13:23:08,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:23:08,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:23:08,316 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-15 13:23:08,317 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631364180] [2020-09-15 13:23:08,317 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139291185] [2020-09-15 13:23:08,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:23:08,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 13:23:08,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:23:08,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 13:23:08,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:23:08,618 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-15 13:23:08,619 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:23:08,619 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2020-09-15 13:23:08,619 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70084252] [2020-09-15 13:23:08,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-15 13:23:08,619 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:23:08,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-15 13:23:08,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2020-09-15 13:23:08,620 INFO L87 Difference]: Start difference. First operand 37780 states and 201508 transitions. Second operand 20 states. [2020-09-15 13:23:13,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:23:13,278 INFO L93 Difference]: Finished difference Result 185731 states and 813247 transitions. [2020-09-15 13:23:13,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-09-15 13:23:13,279 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 27 [2020-09-15 13:23:13,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:23:13,804 INFO L225 Difference]: With dead ends: 185731 [2020-09-15 13:23:13,804 INFO L226 Difference]: Without dead ends: 185707 [2020-09-15 13:23:13,804 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1874 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1283, Invalid=4723, Unknown=0, NotChecked=0, Total=6006 [2020-09-15 13:23:15,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185707 states. [2020-09-15 13:23:20,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185707 to 37506. [2020-09-15 13:23:20,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37506 states. [2020-09-15 13:23:21,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37506 states to 37506 states and 200034 transitions. [2020-09-15 13:23:21,040 INFO L78 Accepts]: Start accepts. Automaton has 37506 states and 200034 transitions. Word has length 27 [2020-09-15 13:23:21,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:23:21,040 INFO L479 AbstractCegarLoop]: Abstraction has 37506 states and 200034 transitions. [2020-09-15 13:23:21,040 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-15 13:23:21,041 INFO L276 IsEmpty]: Start isEmpty. Operand 37506 states and 200034 transitions. [2020-09-15 13:23:21,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-15 13:23:21,044 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:23:21,044 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:23:21,245 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2020-09-15 13:23:21,245 INFO L427 AbstractCegarLoop]: === Iteration 45 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:23:21,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:23:21,246 INFO L82 PathProgramCache]: Analyzing trace with hash 2078895349, now seen corresponding path program 3 times [2020-09-15 13:23:21,246 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:23:21,246 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674894215] [2020-09-15 13:23:21,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:23:21,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:23:21,373 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-15 13:23:21,373 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674894215] [2020-09-15 13:23:21,373 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140070127] [2020-09-15 13:23:21,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:23:21,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-15 13:23:21,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:23:21,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 13:23:21,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:23:21,675 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-15 13:23:21,675 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:23:21,675 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2020-09-15 13:23:21,676 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326934917] [2020-09-15 13:23:21,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-15 13:23:21,676 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:23:21,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-15 13:23:21,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2020-09-15 13:23:21,676 INFO L87 Difference]: Start difference. First operand 37506 states and 200034 transitions. Second operand 20 states. [2020-09-15 13:23:26,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:23:26,076 INFO L93 Difference]: Finished difference Result 185071 states and 810108 transitions. [2020-09-15 13:23:26,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-09-15 13:23:26,077 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 27 [2020-09-15 13:23:26,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:23:26,586 INFO L225 Difference]: With dead ends: 185071 [2020-09-15 13:23:26,586 INFO L226 Difference]: Without dead ends: 185053 [2020-09-15 13:23:26,587 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1876 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1283, Invalid=4723, Unknown=0, NotChecked=0, Total=6006 [2020-09-15 13:23:28,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185053 states. [2020-09-15 13:23:31,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185053 to 37607. [2020-09-15 13:23:31,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37607 states. [2020-09-15 13:23:31,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37607 states to 37607 states and 200519 transitions. [2020-09-15 13:23:31,267 INFO L78 Accepts]: Start accepts. Automaton has 37607 states and 200519 transitions. Word has length 27 [2020-09-15 13:23:31,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:23:31,267 INFO L479 AbstractCegarLoop]: Abstraction has 37607 states and 200519 transitions. [2020-09-15 13:23:31,267 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-15 13:23:31,267 INFO L276 IsEmpty]: Start isEmpty. Operand 37607 states and 200519 transitions. [2020-09-15 13:23:31,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-15 13:23:31,272 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:23:31,272 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forcibly destroying the process [2020-09-15 13:23:34,222 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:23:34,222 INFO L427 AbstractCegarLoop]: === Iteration 46 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:23:34,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:23:34,223 INFO L82 PathProgramCache]: Analyzing trace with hash -651887627, now seen corresponding path program 4 times [2020-09-15 13:23:34,223 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:23:34,223 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85935312] [2020-09-15 13:23:34,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] The stream was forcibly closed: stdIn [2020-09-15 13:23:34,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:23:34,355 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-15 13:23:34,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85935312] [2020-09-15 13:23:34,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257636551] [2020-09-15 13:23:34,355 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:23:34,474 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 13:23:34,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:23:34,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 13:23:34,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:23:34,680 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-15 13:23:34,680 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:23:34,681 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2020-09-15 13:23:34,681 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136151291] [2020-09-15 13:23:34,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-15 13:23:34,681 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:23:34,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-15 13:23:34,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2020-09-15 13:23:34,682 INFO L87 Difference]: Start difference. First operand 37607 states and 200519 transitions. Second operand 20 states. [2020-09-15 13:23:38,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:23:38,781 INFO L93 Difference]: Finished difference Result 184772 states and 808751 transitions. [2020-09-15 13:23:38,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-09-15 13:23:38,784 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 27 [2020-09-15 13:23:38,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:23:39,462 INFO L225 Difference]: With dead ends: 184772 [2020-09-15 13:23:39,462 INFO L226 Difference]: Without dead ends: 184748 [2020-09-15 13:23:39,463 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1870 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1283, Invalid=4723, Unknown=0, NotChecked=0, Total=6006 [2020-09-15 13:23:41,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184748 states. [2020-09-15 13:23:44,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184748 to 37341. [2020-09-15 13:23:44,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37341 states. [2020-09-15 13:23:45,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37341 states to 37341 states and 199065 transitions. [2020-09-15 13:23:45,104 INFO L78 Accepts]: Start accepts. Automaton has 37341 states and 199065 transitions. Word has length 27 [2020-09-15 13:23:45,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:23:45,104 INFO L479 AbstractCegarLoop]: Abstraction has 37341 states and 199065 transitions. [2020-09-15 13:23:45,104 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-15 13:23:45,105 INFO L276 IsEmpty]: Start isEmpty. Operand 37341 states and 199065 transitions. [2020-09-15 13:23:45,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-15 13:23:45,108 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:23:45,109 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:23:45,309 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:23:45,310 INFO L427 AbstractCegarLoop]: === Iteration 47 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:23:45,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:23:45,311 INFO L82 PathProgramCache]: Analyzing trace with hash -11846923, now seen corresponding path program 5 times [2020-09-15 13:23:45,311 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:23:45,311 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668689404] [2020-09-15 13:23:45,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:23:45,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:23:45,446 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-15 13:23:45,447 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668689404] [2020-09-15 13:23:45,447 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913175224] [2020-09-15 13:23:45,447 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:23:45,575 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-15 13:23:45,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:23:45,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 13:23:45,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:23:45,795 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-15 13:23:45,795 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:23:45,796 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2020-09-15 13:23:45,796 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429969978] [2020-09-15 13:23:45,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-15 13:23:45,797 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:23:45,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-15 13:23:45,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2020-09-15 13:23:45,797 INFO L87 Difference]: Start difference. First operand 37341 states and 199065 transitions. Second operand 20 states. [2020-09-15 13:23:51,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:23:51,541 INFO L93 Difference]: Finished difference Result 184120 states and 805632 transitions. [2020-09-15 13:23:51,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-09-15 13:23:51,543 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 27 [2020-09-15 13:23:51,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:23:52,369 INFO L225 Difference]: With dead ends: 184120 [2020-09-15 13:23:52,369 INFO L226 Difference]: Without dead ends: 184102 [2020-09-15 13:23:52,370 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1869 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1283, Invalid=4723, Unknown=0, NotChecked=0, Total=6006 [2020-09-15 13:23:53,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184102 states. [2020-09-15 13:24:00,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184102 to 37438. [2020-09-15 13:24:00,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37438 states. [2020-09-15 13:24:00,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37438 states to 37438 states and 199538 transitions. [2020-09-15 13:24:00,893 INFO L78 Accepts]: Start accepts. Automaton has 37438 states and 199538 transitions. Word has length 27 [2020-09-15 13:24:00,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:24:00,893 INFO L479 AbstractCegarLoop]: Abstraction has 37438 states and 199538 transitions. [2020-09-15 13:24:00,893 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-15 13:24:00,893 INFO L276 IsEmpty]: Start isEmpty. Operand 37438 states and 199538 transitions. [2020-09-15 13:24:00,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-15 13:24:00,898 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:24:00,898 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:24:01,099 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:24:01,100 INFO L427 AbstractCegarLoop]: === Iteration 48 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:24:01,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:24:01,101 INFO L82 PathProgramCache]: Analyzing trace with hash -22798603, now seen corresponding path program 6 times [2020-09-15 13:24:01,101 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:24:01,101 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730544480] [2020-09-15 13:24:01,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:24:01,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:24:01,237 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-15 13:24:01,238 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730544480] [2020-09-15 13:24:01,238 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702464165] [2020-09-15 13:24:01,238 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:24:01,363 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-15 13:24:01,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:24:01,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 13:24:01,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:24:01,573 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-15 13:24:01,573 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:24:01,574 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2020-09-15 13:24:01,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053978709] [2020-09-15 13:24:01,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-15 13:24:01,574 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:24:01,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-15 13:24:01,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2020-09-15 13:24:01,575 INFO L87 Difference]: Start difference. First operand 37438 states and 199538 transitions. Second operand 20 states. [2020-09-15 13:24:06,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:24:06,559 INFO L93 Difference]: Finished difference Result 183711 states and 803890 transitions. [2020-09-15 13:24:06,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-09-15 13:24:06,560 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 27 [2020-09-15 13:24:06,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:24:07,345 INFO L225 Difference]: With dead ends: 183711 [2020-09-15 13:24:07,345 INFO L226 Difference]: Without dead ends: 183683 [2020-09-15 13:24:07,345 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1858 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1283, Invalid=4723, Unknown=0, NotChecked=0, Total=6006 [2020-09-15 13:24:10,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183683 states. [2020-09-15 13:24:12,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183683 to 37176. [2020-09-15 13:24:12,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37176 states. [2020-09-15 13:24:12,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37176 states to 37176 states and 198103 transitions. [2020-09-15 13:24:12,867 INFO L78 Accepts]: Start accepts. Automaton has 37176 states and 198103 transitions. Word has length 27 [2020-09-15 13:24:12,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:24:12,867 INFO L479 AbstractCegarLoop]: Abstraction has 37176 states and 198103 transitions. [2020-09-15 13:24:12,867 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-15 13:24:12,867 INFO L276 IsEmpty]: Start isEmpty. Operand 37176 states and 198103 transitions. [2020-09-15 13:24:12,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-15 13:24:12,870 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:24:12,870 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:24:13,071 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2020-09-15 13:24:13,071 INFO L427 AbstractCegarLoop]: === Iteration 49 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:24:13,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:24:13,072 INFO L82 PathProgramCache]: Analyzing trace with hash -1035670065, now seen corresponding path program 1 times [2020-09-15 13:24:13,072 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:24:13,073 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957174687] [2020-09-15 13:24:13,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:24:13,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:24:15,531 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-09-15 13:24:15,532 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957174687] [2020-09-15 13:24:15,532 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295863253] [2020-09-15 13:24:15,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:24:15,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:24:15,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-15 13:24:15,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:24:15,720 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-09-15 13:24:15,720 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:24:15,720 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-09-15 13:24:15,721 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234109511] [2020-09-15 13:24:15,721 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-15 13:24:15,721 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:24:15,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-15 13:24:15,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-09-15 13:24:15,721 INFO L87 Difference]: Start difference. First operand 37176 states and 198103 transitions. Second operand 12 states. [2020-09-15 13:24:16,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:24:16,567 INFO L93 Difference]: Finished difference Result 82213 states and 399726 transitions. [2020-09-15 13:24:16,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-15 13:24:16,568 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2020-09-15 13:24:16,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:24:16,800 INFO L225 Difference]: With dead ends: 82213 [2020-09-15 13:24:16,800 INFO L226 Difference]: Without dead ends: 82165 [2020-09-15 13:24:16,800 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=120, Invalid=260, Unknown=0, NotChecked=0, Total=380 [2020-09-15 13:24:17,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82165 states. [2020-09-15 13:24:19,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82165 to 38439. [2020-09-15 13:24:19,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38439 states. [2020-09-15 13:24:19,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38439 states to 38439 states and 204452 transitions. [2020-09-15 13:24:19,152 INFO L78 Accepts]: Start accepts. Automaton has 38439 states and 204452 transitions. Word has length 27 [2020-09-15 13:24:19,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:24:19,153 INFO L479 AbstractCegarLoop]: Abstraction has 38439 states and 204452 transitions. [2020-09-15 13:24:19,153 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-15 13:24:19,153 INFO L276 IsEmpty]: Start isEmpty. Operand 38439 states and 204452 transitions. [2020-09-15 13:24:19,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-15 13:24:19,156 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:24:19,156 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:24:19,357 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2020-09-15 13:24:19,357 INFO L427 AbstractCegarLoop]: === Iteration 50 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:24:19,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:24:19,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1753210507, now seen corresponding path program 7 times [2020-09-15 13:24:19,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:24:19,358 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764032341] [2020-09-15 13:24:19,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:24:19,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:24:19,484 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-15 13:24:19,485 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764032341] [2020-09-15 13:24:19,485 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482914097] [2020-09-15 13:24:19,485 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:24:19,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:24:19,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 13:24:19,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:24:19,778 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-15 13:24:19,779 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:24:19,779 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2020-09-15 13:24:19,779 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151842995] [2020-09-15 13:24:19,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-15 13:24:19,780 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:24:19,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-15 13:24:19,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2020-09-15 13:24:19,781 INFO L87 Difference]: Start difference. First operand 38439 states and 204452 transitions. Second operand 20 states. [2020-09-15 13:24:23,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:24:23,538 INFO L93 Difference]: Finished difference Result 183266 states and 800955 transitions. [2020-09-15 13:24:23,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-09-15 13:24:23,539 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 27 [2020-09-15 13:24:23,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:24:24,904 INFO L225 Difference]: With dead ends: 183266 [2020-09-15 13:24:24,904 INFO L226 Difference]: Without dead ends: 183248 [2020-09-15 13:24:24,905 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1878 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1283, Invalid=4723, Unknown=0, NotChecked=0, Total=6006 [2020-09-15 13:24:26,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183248 states. [2020-09-15 13:24:31,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183248 to 38274. [2020-09-15 13:24:31,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38274 states. [2020-09-15 13:24:31,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38274 states to 38274 states and 203647 transitions. [2020-09-15 13:24:31,857 INFO L78 Accepts]: Start accepts. Automaton has 38274 states and 203647 transitions. Word has length 27 [2020-09-15 13:24:31,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:24:31,857 INFO L479 AbstractCegarLoop]: Abstraction has 38274 states and 203647 transitions. [2020-09-15 13:24:31,857 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-15 13:24:31,857 INFO L276 IsEmpty]: Start isEmpty. Operand 38274 states and 203647 transitions. [2020-09-15 13:24:31,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-15 13:24:31,861 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:24:31,861 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:24:32,061 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2020-09-15 13:24:32,062 INFO L427 AbstractCegarLoop]: === Iteration 51 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:24:32,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:24:32,063 INFO L82 PathProgramCache]: Analyzing trace with hash 1215038581, now seen corresponding path program 8 times [2020-09-15 13:24:32,063 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:24:32,063 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251039138] [2020-09-15 13:24:32,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:24:32,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:24:32,190 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-09-15 13:24:32,191 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251039138] [2020-09-15 13:24:32,191 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859011221] [2020-09-15 13:24:32,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:24:32,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 13:24:32,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:24:32,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 13:24:32,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:24:32,502 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-09-15 13:24:32,502 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:24:32,502 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2020-09-15 13:24:32,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766577011] [2020-09-15 13:24:32,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-15 13:24:32,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:24:32,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-15 13:24:32,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2020-09-15 13:24:32,504 INFO L87 Difference]: Start difference. First operand 38274 states and 203647 transitions. Second operand 20 states. [2020-09-15 13:24:37,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:24:37,688 INFO L93 Difference]: Finished difference Result 182849 states and 799193 transitions. [2020-09-15 13:24:37,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-09-15 13:24:37,689 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 27 [2020-09-15 13:24:37,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:24:38,208 INFO L225 Difference]: With dead ends: 182849 [2020-09-15 13:24:38,208 INFO L226 Difference]: Without dead ends: 182825 [2020-09-15 13:24:38,208 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1870 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1283, Invalid=4723, Unknown=0, NotChecked=0, Total=6006 [2020-09-15 13:24:39,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182825 states. [2020-09-15 13:24:42,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182825 to 37880. [2020-09-15 13:24:42,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37880 states. [2020-09-15 13:24:42,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37880 states to 37880 states and 201614 transitions. [2020-09-15 13:24:42,416 INFO L78 Accepts]: Start accepts. Automaton has 37880 states and 201614 transitions. Word has length 27 [2020-09-15 13:24:42,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:24:42,416 INFO L479 AbstractCegarLoop]: Abstraction has 37880 states and 201614 transitions. [2020-09-15 13:24:42,416 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-15 13:24:42,416 INFO L276 IsEmpty]: Start isEmpty. Operand 37880 states and 201614 transitions. [2020-09-15 13:24:42,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-15 13:24:42,420 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:24:42,420 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:24:42,621 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2020-09-15 13:24:42,621 INFO L427 AbstractCegarLoop]: === Iteration 52 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:24:42,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:24:42,622 INFO L82 PathProgramCache]: Analyzing trace with hash -1641326347, now seen corresponding path program 9 times [2020-09-15 13:24:42,622 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:24:42,622 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154582677] [2020-09-15 13:24:42,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:24:42,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:24:42,747 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-15 13:24:42,748 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154582677] [2020-09-15 13:24:42,748 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136850544] [2020-09-15 13:24:42,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:24:42,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-15 13:24:42,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:24:42,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 13:24:42,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:24:43,065 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-15 13:24:43,065 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:24:43,066 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2020-09-15 13:24:43,066 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691587264] [2020-09-15 13:24:43,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-15 13:24:43,066 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:24:43,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-15 13:24:43,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2020-09-15 13:24:43,067 INFO L87 Difference]: Start difference. First operand 37880 states and 201614 transitions. Second operand 20 states. [2020-09-15 13:24:49,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:24:49,009 INFO L93 Difference]: Finished difference Result 183813 states and 803277 transitions. [2020-09-15 13:24:49,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-09-15 13:24:49,010 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 27 [2020-09-15 13:24:49,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:24:49,498 INFO L225 Difference]: With dead ends: 183813 [2020-09-15 13:24:49,498 INFO L226 Difference]: Without dead ends: 183795 [2020-09-15 13:24:49,499 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1874 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1283, Invalid=4723, Unknown=0, NotChecked=0, Total=6006 [2020-09-15 13:24:51,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183795 states. [2020-09-15 13:24:53,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183795 to 37981. [2020-09-15 13:24:53,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37981 states. [2020-09-15 13:24:54,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37981 states to 37981 states and 202099 transitions. [2020-09-15 13:24:54,234 INFO L78 Accepts]: Start accepts. Automaton has 37981 states and 202099 transitions. Word has length 27 [2020-09-15 13:24:54,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:24:54,234 INFO L479 AbstractCegarLoop]: Abstraction has 37981 states and 202099 transitions. [2020-09-15 13:24:54,234 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-15 13:24:54,235 INFO L276 IsEmpty]: Start isEmpty. Operand 37981 states and 202099 transitions. [2020-09-15 13:24:54,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-15 13:24:54,239 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:24:54,239 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:24:54,443 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2020-09-15 13:24:54,445 INFO L427 AbstractCegarLoop]: === Iteration 53 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:24:54,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:24:54,446 INFO L82 PathProgramCache]: Analyzing trace with hash -144395083, now seen corresponding path program 10 times [2020-09-15 13:24:54,446 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:24:54,447 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692075762] [2020-09-15 13:24:54,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:24:54,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:24:54,571 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-15 13:24:54,572 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692075762] [2020-09-15 13:24:54,572 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012556354] [2020-09-15 13:24:54,572 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:24:54,690 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 13:24:54,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:24:54,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 13:24:54,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:24:54,887 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-15 13:24:54,888 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:24:54,888 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2020-09-15 13:24:54,888 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809560930] [2020-09-15 13:24:54,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-15 13:24:54,889 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:24:54,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-15 13:24:54,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2020-09-15 13:24:54,890 INFO L87 Difference]: Start difference. First operand 37981 states and 202099 transitions. Second operand 20 states. [2020-09-15 13:24:59,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:24:59,419 INFO L93 Difference]: Finished difference Result 184566 states and 806586 transitions. [2020-09-15 13:24:59,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-09-15 13:24:59,420 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 27 [2020-09-15 13:24:59,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:24:59,915 INFO L225 Difference]: With dead ends: 184566 [2020-09-15 13:24:59,915 INFO L226 Difference]: Without dead ends: 184542 [2020-09-15 13:24:59,915 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1873 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1283, Invalid=4723, Unknown=0, NotChecked=0, Total=6006 [2020-09-15 13:25:02,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184542 states. [2020-09-15 13:25:07,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184542 to 37715. [2020-09-15 13:25:07,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37715 states. [2020-09-15 13:25:07,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37715 states to 37715 states and 200645 transitions. [2020-09-15 13:25:07,956 INFO L78 Accepts]: Start accepts. Automaton has 37715 states and 200645 transitions. Word has length 27 [2020-09-15 13:25:07,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:25:07,957 INFO L479 AbstractCegarLoop]: Abstraction has 37715 states and 200645 transitions. [2020-09-15 13:25:07,957 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-15 13:25:07,957 INFO L276 IsEmpty]: Start isEmpty. Operand 37715 states and 200645 transitions. [2020-09-15 13:25:07,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-15 13:25:07,961 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:25:07,962 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:25:08,178 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:25:08,178 INFO L427 AbstractCegarLoop]: === Iteration 54 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:25:08,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:25:08,179 INFO L82 PathProgramCache]: Analyzing trace with hash 484693941, now seen corresponding path program 11 times [2020-09-15 13:25:08,179 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:25:08,180 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735729754] [2020-09-15 13:25:08,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:25:08,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:25:08,302 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-09-15 13:25:08,302 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735729754] [2020-09-15 13:25:08,302 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336999873] [2020-09-15 13:25:08,302 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:25:08,420 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-15 13:25:08,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:25:08,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 13:25:08,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:25:08,621 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-09-15 13:25:08,622 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:25:08,622 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2020-09-15 13:25:08,622 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237709774] [2020-09-15 13:25:08,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-15 13:25:08,623 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:25:08,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-15 13:25:08,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2020-09-15 13:25:08,623 INFO L87 Difference]: Start difference. First operand 37715 states and 200645 transitions. Second operand 20 states. [2020-09-15 13:25:13,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:25:13,619 INFO L93 Difference]: Finished difference Result 183914 states and 803467 transitions. [2020-09-15 13:25:13,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-09-15 13:25:13,620 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 27 [2020-09-15 13:25:13,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:25:14,134 INFO L225 Difference]: With dead ends: 183914 [2020-09-15 13:25:14,134 INFO L226 Difference]: Without dead ends: 183896 [2020-09-15 13:25:14,135 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1861 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1283, Invalid=4723, Unknown=0, NotChecked=0, Total=6006 [2020-09-15 13:25:15,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183896 states. [2020-09-15 13:25:18,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183896 to 37812. [2020-09-15 13:25:18,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37812 states. [2020-09-15 13:25:18,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37812 states to 37812 states and 201118 transitions. [2020-09-15 13:25:18,304 INFO L78 Accepts]: Start accepts. Automaton has 37812 states and 201118 transitions. Word has length 27 [2020-09-15 13:25:18,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:25:18,305 INFO L479 AbstractCegarLoop]: Abstraction has 37812 states and 201118 transitions. [2020-09-15 13:25:18,305 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-15 13:25:18,305 INFO L276 IsEmpty]: Start isEmpty. Operand 37812 states and 201118 transitions. [2020-09-15 13:25:18,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-15 13:25:18,308 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:25:18,308 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:25:18,509 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2020-09-15 13:25:18,509 INFO L427 AbstractCegarLoop]: === Iteration 55 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:25:18,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:25:18,510 INFO L82 PathProgramCache]: Analyzing trace with hash 468950901, now seen corresponding path program 12 times [2020-09-15 13:25:18,510 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:25:18,511 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50294383] [2020-09-15 13:25:18,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:25:18,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:25:18,633 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-09-15 13:25:18,634 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50294383] [2020-09-15 13:25:18,634 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456561395] [2020-09-15 13:25:18,634 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:25:18,749 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-15 13:25:18,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:25:18,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 13:25:18,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:25:18,941 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-09-15 13:25:18,941 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:25:18,942 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2020-09-15 13:25:18,942 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940005907] [2020-09-15 13:25:18,942 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-15 13:25:18,942 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:25:18,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-15 13:25:18,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2020-09-15 13:25:18,943 INFO L87 Difference]: Start difference. First operand 37812 states and 201118 transitions. Second operand 20 states. [2020-09-15 13:25:24,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:25:24,483 INFO L93 Difference]: Finished difference Result 182421 states and 796955 transitions. [2020-09-15 13:25:24,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-09-15 13:25:24,484 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 27 [2020-09-15 13:25:24,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:25:24,971 INFO L225 Difference]: With dead ends: 182421 [2020-09-15 13:25:24,971 INFO L226 Difference]: Without dead ends: 182393 [2020-09-15 13:25:24,971 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1871 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1283, Invalid=4723, Unknown=0, NotChecked=0, Total=6006 [2020-09-15 13:25:30,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182393 states. [2020-09-15 13:25:31,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182393 to 37550. [2020-09-15 13:25:31,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37550 states. [2020-09-15 13:25:31,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37550 states to 37550 states and 199683 transitions. [2020-09-15 13:25:31,950 INFO L78 Accepts]: Start accepts. Automaton has 37550 states and 199683 transitions. Word has length 27 [2020-09-15 13:25:31,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:25:31,950 INFO L479 AbstractCegarLoop]: Abstraction has 37550 states and 199683 transitions. [2020-09-15 13:25:31,950 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-15 13:25:31,950 INFO L276 IsEmpty]: Start isEmpty. Operand 37550 states and 199683 transitions. [2020-09-15 13:25:31,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-15 13:25:31,954 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:25:31,954 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:25:32,161 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2020-09-15 13:25:32,162 INFO L427 AbstractCegarLoop]: === Iteration 56 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:25:32,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:25:32,162 INFO L82 PathProgramCache]: Analyzing trace with hash -528149714, now seen corresponding path program 1 times [2020-09-15 13:25:32,163 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:25:32,163 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370976502] [2020-09-15 13:25:32,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:25:32,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:25:32,235 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-09-15 13:25:32,236 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370976502] [2020-09-15 13:25:32,236 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596771561] [2020-09-15 13:25:32,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:25:32,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:25:32,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-15 13:25:32,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:25:32,846 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-09-15 13:25:32,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:25:32,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-09-15 13:25:32,846 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699946149] [2020-09-15 13:25:32,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-15 13:25:32,847 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:25:32,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-15 13:25:32,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-09-15 13:25:32,847 INFO L87 Difference]: Start difference. First operand 37550 states and 199683 transitions. Second operand 12 states. [2020-09-15 13:25:33,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:25:33,830 INFO L93 Difference]: Finished difference Result 86095 states and 418282 transitions. [2020-09-15 13:25:33,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-15 13:25:33,831 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2020-09-15 13:25:33,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:25:34,077 INFO L225 Difference]: With dead ends: 86095 [2020-09-15 13:25:34,077 INFO L226 Difference]: Without dead ends: 86043 [2020-09-15 13:25:34,077 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=260, Unknown=0, NotChecked=0, Total=380 [2020-09-15 13:25:34,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86043 states. [2020-09-15 13:25:36,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86043 to 39046. [2020-09-15 13:25:36,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39046 states. [2020-09-15 13:25:36,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39046 states to 39046 states and 207545 transitions. [2020-09-15 13:25:36,643 INFO L78 Accepts]: Start accepts. Automaton has 39046 states and 207545 transitions. Word has length 27 [2020-09-15 13:25:36,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:25:36,643 INFO L479 AbstractCegarLoop]: Abstraction has 39046 states and 207545 transitions. [2020-09-15 13:25:36,643 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-15 13:25:36,643 INFO L276 IsEmpty]: Start isEmpty. Operand 39046 states and 207545 transitions. [2020-09-15 13:25:36,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-15 13:25:36,647 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:25:36,647 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:25:36,848 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:25:36,848 INFO L427 AbstractCegarLoop]: === Iteration 57 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:25:36,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:25:36,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1008837557, now seen corresponding path program 13 times [2020-09-15 13:25:36,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:25:36,849 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363638960] [2020-09-15 13:25:36,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:25:36,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:25:36,977 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-09-15 13:25:36,977 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363638960] [2020-09-15 13:25:36,977 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963699803] [2020-09-15 13:25:36,977 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:25:37,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:25:37,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 13:25:37,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:25:37,359 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-09-15 13:25:37,359 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:25:37,359 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2020-09-15 13:25:37,359 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073323257] [2020-09-15 13:25:37,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-15 13:25:37,360 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:25:37,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-15 13:25:37,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2020-09-15 13:25:37,360 INFO L87 Difference]: Start difference. First operand 39046 states and 207545 transitions. Second operand 20 states. [2020-09-15 13:25:41,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:25:41,262 INFO L93 Difference]: Finished difference Result 182203 states and 795088 transitions. [2020-09-15 13:25:41,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-09-15 13:25:41,263 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 27 [2020-09-15 13:25:41,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:25:42,602 INFO L225 Difference]: With dead ends: 182203 [2020-09-15 13:25:42,603 INFO L226 Difference]: Without dead ends: 182185 [2020-09-15 13:25:42,603 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1874 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1283, Invalid=4723, Unknown=0, NotChecked=0, Total=6006 [2020-09-15 13:25:44,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182185 states. [2020-09-15 13:25:49,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182185 to 38881. [2020-09-15 13:25:49,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38881 states. [2020-09-15 13:25:50,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38881 states to 38881 states and 206740 transitions. [2020-09-15 13:25:50,015 INFO L78 Accepts]: Start accepts. Automaton has 38881 states and 206740 transitions. Word has length 27 [2020-09-15 13:25:50,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:25:50,015 INFO L479 AbstractCegarLoop]: Abstraction has 38881 states and 206740 transitions. [2020-09-15 13:25:50,015 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-15 13:25:50,015 INFO L276 IsEmpty]: Start isEmpty. Operand 38881 states and 206740 transitions. [2020-09-15 13:25:50,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-15 13:25:50,020 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:25:50,020 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:25:50,233 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:25:50,233 INFO L427 AbstractCegarLoop]: === Iteration 58 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:25:50,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:25:50,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1789198475, now seen corresponding path program 14 times [2020-09-15 13:25:50,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:25:50,235 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110687792] [2020-09-15 13:25:50,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:25:50,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:25:50,361 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-09-15 13:25:50,361 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110687792] [2020-09-15 13:25:50,361 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031096316] [2020-09-15 13:25:50,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:25:50,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 13:25:50,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:25:50,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 13:25:50,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:25:50,686 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-09-15 13:25:50,687 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:25:50,687 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2020-09-15 13:25:50,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360480953] [2020-09-15 13:25:50,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-15 13:25:50,687 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:25:50,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-15 13:25:50,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2020-09-15 13:25:50,688 INFO L87 Difference]: Start difference. First operand 38881 states and 206740 transitions. Second operand 20 states. [2020-09-15 13:25:55,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:25:55,487 INFO L93 Difference]: Finished difference Result 182814 states and 797848 transitions. [2020-09-15 13:25:55,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-09-15 13:25:55,488 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 27 [2020-09-15 13:25:55,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:25:55,993 INFO L225 Difference]: With dead ends: 182814 [2020-09-15 13:25:55,993 INFO L226 Difference]: Without dead ends: 182790 [2020-09-15 13:25:55,994 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1874 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1283, Invalid=4723, Unknown=0, NotChecked=0, Total=6006 [2020-09-15 13:25:57,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182790 states. [2020-09-15 13:26:00,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182790 to 38491. [2020-09-15 13:26:00,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38491 states. [2020-09-15 13:26:00,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38491 states to 38491 states and 204715 transitions. [2020-09-15 13:26:00,196 INFO L78 Accepts]: Start accepts. Automaton has 38491 states and 204715 transitions. Word has length 27 [2020-09-15 13:26:00,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:26:00,196 INFO L479 AbstractCegarLoop]: Abstraction has 38491 states and 204715 transitions. [2020-09-15 13:26:00,197 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-15 13:26:00,197 INFO L276 IsEmpty]: Start isEmpty. Operand 38491 states and 204715 transitions. [2020-09-15 13:26:00,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-15 13:26:00,201 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:26:00,201 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:26:00,401 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:26:00,402 INFO L427 AbstractCegarLoop]: === Iteration 59 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:26:00,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:26:00,403 INFO L82 PathProgramCache]: Analyzing trace with hash 1120567157, now seen corresponding path program 15 times [2020-09-15 13:26:00,403 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:26:00,403 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832893754] [2020-09-15 13:26:00,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:26:00,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:26:00,532 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-09-15 13:26:00,532 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832893754] [2020-09-15 13:26:00,532 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530219882] [2020-09-15 13:26:00,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:26:00,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-15 13:26:00,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:26:00,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 13:26:00,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:26:00,863 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-09-15 13:26:00,863 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:26:00,863 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2020-09-15 13:26:00,863 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288719844] [2020-09-15 13:26:00,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-15 13:26:00,864 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:26:00,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-15 13:26:00,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2020-09-15 13:26:00,865 INFO L87 Difference]: Start difference. First operand 38491 states and 204715 transitions. Second operand 20 states. [2020-09-15 13:26:05,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:26:05,552 INFO L93 Difference]: Finished difference Result 181233 states and 790722 transitions. [2020-09-15 13:26:05,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-09-15 13:26:05,553 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 27 [2020-09-15 13:26:05,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:26:06,086 INFO L225 Difference]: With dead ends: 181233 [2020-09-15 13:26:06,086 INFO L226 Difference]: Without dead ends: 181215 [2020-09-15 13:26:06,086 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1871 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1283, Invalid=4723, Unknown=0, NotChecked=0, Total=6006 [2020-09-15 13:26:08,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181215 states. [2020-09-15 13:26:10,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181215 to 38192. [2020-09-15 13:26:10,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38192 states. [2020-09-15 13:26:14,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38192 states to 38192 states and 203358 transitions. [2020-09-15 13:26:14,756 INFO L78 Accepts]: Start accepts. Automaton has 38192 states and 203358 transitions. Word has length 27 [2020-09-15 13:26:14,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:26:14,757 INFO L479 AbstractCegarLoop]: Abstraction has 38192 states and 203358 transitions. [2020-09-15 13:26:14,757 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-15 13:26:14,757 INFO L276 IsEmpty]: Start isEmpty. Operand 38192 states and 203358 transitions. [2020-09-15 13:26:14,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-15 13:26:14,761 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:26:14,761 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:26:14,961 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2020-09-15 13:26:14,962 INFO L427 AbstractCegarLoop]: === Iteration 60 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:26:14,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:26:14,963 INFO L82 PathProgramCache]: Analyzing trace with hash -1610215819, now seen corresponding path program 16 times [2020-09-15 13:26:14,963 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:26:14,963 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196616802] [2020-09-15 13:26:14,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:26:14,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:26:15,090 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-09-15 13:26:15,090 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196616802] [2020-09-15 13:26:15,090 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923706723] [2020-09-15 13:26:15,090 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:26:15,205 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 13:26:15,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:26:15,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 13:26:15,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:26:15,412 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-09-15 13:26:15,412 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:26:15,413 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2020-09-15 13:26:15,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764067551] [2020-09-15 13:26:15,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-15 13:26:15,413 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:26:15,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-15 13:26:15,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2020-09-15 13:26:15,414 INFO L87 Difference]: Start difference. First operand 38192 states and 203358 transitions. Second operand 20 states. [2020-09-15 13:26:20,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:26:20,143 INFO L93 Difference]: Finished difference Result 181989 states and 794023 transitions. [2020-09-15 13:26:20,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-09-15 13:26:20,144 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 27 [2020-09-15 13:26:20,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:26:20,627 INFO L225 Difference]: With dead ends: 181989 [2020-09-15 13:26:20,627 INFO L226 Difference]: Without dead ends: 181965 [2020-09-15 13:26:20,628 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1866 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1283, Invalid=4723, Unknown=0, NotChecked=0, Total=6006 [2020-09-15 13:26:22,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181965 states. [2020-09-15 13:26:24,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181965 to 37802. [2020-09-15 13:26:24,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37802 states. [2020-09-15 13:26:25,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37802 states to 37802 states and 201333 transitions. [2020-09-15 13:26:25,036 INFO L78 Accepts]: Start accepts. Automaton has 37802 states and 201333 transitions. Word has length 27 [2020-09-15 13:26:25,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:26:25,037 INFO L479 AbstractCegarLoop]: Abstraction has 37802 states and 201333 transitions. [2020-09-15 13:26:25,037 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-15 13:26:25,037 INFO L276 IsEmpty]: Start isEmpty. Operand 37802 states and 201333 transitions. [2020-09-15 13:26:25,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-15 13:26:25,041 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:26:25,041 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:26:25,241 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2020-09-15 13:26:25,242 INFO L427 AbstractCegarLoop]: === Iteration 61 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:26:25,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:26:25,242 INFO L82 PathProgramCache]: Analyzing trace with hash -1846620555, now seen corresponding path program 17 times [2020-09-15 13:26:25,243 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:26:25,243 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457835920] [2020-09-15 13:26:25,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:26:25,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:26:25,368 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-09-15 13:26:25,368 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457835920] [2020-09-15 13:26:25,369 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145388467] [2020-09-15 13:26:25,369 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:26:25,487 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-15 13:26:25,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:26:25,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 13:26:25,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:26:25,689 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-09-15 13:26:25,690 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:26:25,690 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2020-09-15 13:26:25,690 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514633208] [2020-09-15 13:26:25,690 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-15 13:26:25,690 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:26:25,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-15 13:26:25,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2020-09-15 13:26:25,691 INFO L87 Difference]: Start difference. First operand 37802 states and 201333 transitions. Second operand 20 states. [2020-09-15 13:26:30,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:26:30,571 INFO L93 Difference]: Finished difference Result 183299 states and 799959 transitions. [2020-09-15 13:26:30,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-09-15 13:26:30,572 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 27 [2020-09-15 13:26:30,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:26:31,085 INFO L225 Difference]: With dead ends: 183299 [2020-09-15 13:26:31,085 INFO L226 Difference]: Without dead ends: 183281 [2020-09-15 13:26:31,085 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1870 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1283, Invalid=4723, Unknown=0, NotChecked=0, Total=6006 [2020-09-15 13:26:32,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183281 states. [2020-09-15 13:26:37,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183281 to 37899. [2020-09-15 13:26:37,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37899 states. [2020-09-15 13:26:38,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37899 states to 37899 states and 201806 transitions. [2020-09-15 13:26:38,126 INFO L78 Accepts]: Start accepts. Automaton has 37899 states and 201806 transitions. Word has length 27 [2020-09-15 13:26:38,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:26:38,126 INFO L479 AbstractCegarLoop]: Abstraction has 37899 states and 201806 transitions. [2020-09-15 13:26:38,127 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-15 13:26:38,127 INFO L276 IsEmpty]: Start isEmpty. Operand 37899 states and 201806 transitions. [2020-09-15 13:26:38,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-15 13:26:38,131 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:26:38,131 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:26:38,331 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2020-09-15 13:26:38,332 INFO L427 AbstractCegarLoop]: === Iteration 62 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:26:38,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:26:38,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1873315275, now seen corresponding path program 18 times [2020-09-15 13:26:38,333 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:26:38,333 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001057497] [2020-09-15 13:26:38,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:26:38,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:26:38,460 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-09-15 13:26:38,461 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001057497] [2020-09-15 13:26:38,461 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703473819] [2020-09-15 13:26:38,461 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:26:38,579 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-15 13:26:38,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:26:38,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 13:26:38,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:26:38,790 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-09-15 13:26:38,790 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:26:38,791 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2020-09-15 13:26:38,791 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36587099] [2020-09-15 13:26:38,791 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-15 13:26:38,791 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:26:38,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-15 13:26:38,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2020-09-15 13:26:38,792 INFO L87 Difference]: Start difference. First operand 37899 states and 201806 transitions. Second operand 20 states. [2020-09-15 13:26:43,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:26:43,608 INFO L93 Difference]: Finished difference Result 182890 states and 798217 transitions. [2020-09-15 13:26:43,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-09-15 13:26:43,609 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 27 [2020-09-15 13:26:43,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:26:44,112 INFO L225 Difference]: With dead ends: 182890 [2020-09-15 13:26:44,112 INFO L226 Difference]: Without dead ends: 182862 [2020-09-15 13:26:44,113 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1861 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1283, Invalid=4723, Unknown=0, NotChecked=0, Total=6006 [2020-09-15 13:26:46,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182862 states. [2020-09-15 13:26:48,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182862 to 37637. [2020-09-15 13:26:48,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37637 states. [2020-09-15 13:26:48,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37637 states to 37637 states and 200371 transitions. [2020-09-15 13:26:48,256 INFO L78 Accepts]: Start accepts. Automaton has 37637 states and 200371 transitions. Word has length 27 [2020-09-15 13:26:48,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:26:48,256 INFO L479 AbstractCegarLoop]: Abstraction has 37637 states and 200371 transitions. [2020-09-15 13:26:48,256 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-15 13:26:48,256 INFO L276 IsEmpty]: Start isEmpty. Operand 37637 states and 200371 transitions. [2020-09-15 13:26:48,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-15 13:26:48,260 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:26:48,260 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:26:48,460 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2020-09-15 13:26:48,461 INFO L427 AbstractCegarLoop]: === Iteration 63 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:26:48,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:26:48,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1424539998, now seen corresponding path program 1 times [2020-09-15 13:26:48,462 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:26:48,462 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704195437] [2020-09-15 13:26:48,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:26:48,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:26:48,534 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-15 13:26:48,534 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704195437] [2020-09-15 13:26:48,535 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358021771] [2020-09-15 13:26:48,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:26:49,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:26:49,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-15 13:26:49,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:26:49,480 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-15 13:26:49,480 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:26:49,480 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-09-15 13:26:49,481 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408364006] [2020-09-15 13:26:49,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-15 13:26:49,481 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:26:49,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-15 13:26:49,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-09-15 13:26:49,482 INFO L87 Difference]: Start difference. First operand 37637 states and 200371 transitions. Second operand 12 states. [2020-09-15 13:26:50,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:26:50,511 INFO L93 Difference]: Finished difference Result 88848 states and 432494 transitions. [2020-09-15 13:26:50,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-15 13:26:50,512 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2020-09-15 13:26:50,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:26:50,766 INFO L225 Difference]: With dead ends: 88848 [2020-09-15 13:26:50,767 INFO L226 Difference]: Without dead ends: 88788 [2020-09-15 13:26:50,767 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=260, Unknown=0, NotChecked=0, Total=380 [2020-09-15 13:26:51,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88788 states. [2020-09-15 13:26:53,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88788 to 39292. [2020-09-15 13:26:53,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39292 states. [2020-09-15 13:26:53,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39292 states to 39292 states and 209387 transitions. [2020-09-15 13:26:53,440 INFO L78 Accepts]: Start accepts. Automaton has 39292 states and 209387 transitions. Word has length 27 [2020-09-15 13:26:53,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:26:53,440 INFO L479 AbstractCegarLoop]: Abstraction has 39292 states and 209387 transitions. [2020-09-15 13:26:53,440 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-15 13:26:53,440 INFO L276 IsEmpty]: Start isEmpty. Operand 39292 states and 209387 transitions. [2020-09-15 13:26:53,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-15 13:26:53,445 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:26:53,445 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:26:53,645 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:26:53,646 INFO L427 AbstractCegarLoop]: === Iteration 64 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:26:53,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:26:53,646 INFO L82 PathProgramCache]: Analyzing trace with hash -839318940, now seen corresponding path program 1 times [2020-09-15 13:26:53,647 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:26:53,647 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019831317] [2020-09-15 13:26:53,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:26:53,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:26:53,723 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-09-15 13:26:53,723 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019831317] [2020-09-15 13:26:53,724 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414480407] [2020-09-15 13:26:53,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:26:53,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:26:53,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-15 13:26:53,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:26:53,922 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-09-15 13:26:53,922 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:26:53,922 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-09-15 13:26:53,922 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510188701] [2020-09-15 13:26:53,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-15 13:26:53,923 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:26:53,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-15 13:26:53,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-09-15 13:26:53,923 INFO L87 Difference]: Start difference. First operand 39292 states and 209387 transitions. Second operand 12 states. [2020-09-15 13:26:54,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:26:54,945 INFO L93 Difference]: Finished difference Result 92913 states and 454143 transitions. [2020-09-15 13:26:54,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-15 13:26:54,946 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2020-09-15 13:26:54,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:26:55,217 INFO L225 Difference]: With dead ends: 92913 [2020-09-15 13:26:55,217 INFO L226 Difference]: Without dead ends: 92836 [2020-09-15 13:26:55,217 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=260, Unknown=0, NotChecked=0, Total=380 [2020-09-15 13:26:56,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92836 states. [2020-09-15 13:26:57,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92836 to 40834. [2020-09-15 13:26:57,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40834 states. [2020-09-15 13:26:57,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40834 states to 40834 states and 218021 transitions. [2020-09-15 13:26:57,930 INFO L78 Accepts]: Start accepts. Automaton has 40834 states and 218021 transitions. Word has length 27 [2020-09-15 13:26:57,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:26:57,930 INFO L479 AbstractCegarLoop]: Abstraction has 40834 states and 218021 transitions. [2020-09-15 13:26:57,930 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-15 13:26:57,931 INFO L276 IsEmpty]: Start isEmpty. Operand 40834 states and 218021 transitions. [2020-09-15 13:26:57,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-15 13:26:57,936 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:26:57,936 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:26:58,145 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2020-09-15 13:26:58,145 INFO L427 AbstractCegarLoop]: === Iteration 65 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:26:58,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:26:58,146 INFO L82 PathProgramCache]: Analyzing trace with hash -947827339, now seen corresponding path program 19 times [2020-09-15 13:26:58,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:26:58,147 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59114194] [2020-09-15 13:26:58,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:26:58,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:26:58,280 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-09-15 13:26:58,280 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59114194] [2020-09-15 13:26:58,280 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 13:26:58,280 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-09-15 13:26:58,281 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828623589] [2020-09-15 13:26:58,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-15 13:26:58,281 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:26:58,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-15 13:26:58,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-09-15 13:26:58,281 INFO L87 Difference]: Start difference. First operand 40834 states and 218021 transitions. Second operand 11 states. [2020-09-15 13:27:02,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:27:02,902 INFO L93 Difference]: Finished difference Result 180696 states and 786321 transitions. [2020-09-15 13:27:02,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-09-15 13:27:02,903 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2020-09-15 13:27:02,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:27:03,413 INFO L225 Difference]: With dead ends: 180696 [2020-09-15 13:27:03,413 INFO L226 Difference]: Without dead ends: 180678 [2020-09-15 13:27:03,413 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1552 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=941, Invalid=3751, Unknown=0, NotChecked=0, Total=4692 [2020-09-15 13:27:04,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180678 states. [2020-09-15 13:27:10,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180678 to 40673. [2020-09-15 13:27:10,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40673 states. [2020-09-15 13:27:10,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40673 states to 40673 states and 217228 transitions. [2020-09-15 13:27:10,657 INFO L78 Accepts]: Start accepts. Automaton has 40673 states and 217228 transitions. Word has length 27 [2020-09-15 13:27:10,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:27:10,657 INFO L479 AbstractCegarLoop]: Abstraction has 40673 states and 217228 transitions. [2020-09-15 13:27:10,657 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-15 13:27:10,657 INFO L276 IsEmpty]: Start isEmpty. Operand 40673 states and 217228 transitions. [2020-09-15 13:27:10,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-15 13:27:10,663 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:27:10,663 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:27:10,663 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2020-09-15 13:27:10,663 INFO L427 AbstractCegarLoop]: === Iteration 66 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:27:10,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:27:10,663 INFO L82 PathProgramCache]: Analyzing trace with hash -963570379, now seen corresponding path program 20 times [2020-09-15 13:27:10,663 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:27:10,664 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468557418] [2020-09-15 13:27:10,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:27:10,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:27:10,791 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-09-15 13:27:10,791 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468557418] [2020-09-15 13:27:10,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 13:27:10,792 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-09-15 13:27:10,792 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151093624] [2020-09-15 13:27:10,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-15 13:27:10,792 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:27:10,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-15 13:27:10,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-09-15 13:27:10,793 INFO L87 Difference]: Start difference. First operand 40673 states and 217228 transitions. Second operand 11 states. [2020-09-15 13:27:15,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:27:15,525 INFO L93 Difference]: Finished difference Result 180287 states and 784579 transitions. [2020-09-15 13:27:15,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-09-15 13:27:15,527 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2020-09-15 13:27:15,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:27:16,020 INFO L225 Difference]: With dead ends: 180287 [2020-09-15 13:27:16,021 INFO L226 Difference]: Without dead ends: 180263 [2020-09-15 13:27:16,021 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1559 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=941, Invalid=3751, Unknown=0, NotChecked=0, Total=4692 [2020-09-15 13:27:17,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180263 states. [2020-09-15 13:27:20,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180263 to 40321. [2020-09-15 13:27:20,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40321 states. [2020-09-15 13:27:20,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40321 states to 40321 states and 215433 transitions. [2020-09-15 13:27:20,275 INFO L78 Accepts]: Start accepts. Automaton has 40321 states and 215433 transitions. Word has length 27 [2020-09-15 13:27:20,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:27:20,275 INFO L479 AbstractCegarLoop]: Abstraction has 40321 states and 215433 transitions. [2020-09-15 13:27:20,275 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-15 13:27:20,275 INFO L276 IsEmpty]: Start isEmpty. Operand 40321 states and 215433 transitions. [2020-09-15 13:27:20,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-15 13:27:20,280 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:27:20,280 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:27:20,280 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2020-09-15 13:27:20,280 INFO L427 AbstractCegarLoop]: === Iteration 67 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:27:20,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:27:20,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1412510069, now seen corresponding path program 21 times [2020-09-15 13:27:20,281 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:27:20,281 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785655301] [2020-09-15 13:27:20,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:27:20,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:27:20,407 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-09-15 13:27:20,407 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785655301] [2020-09-15 13:27:20,407 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 13:27:20,407 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-09-15 13:27:20,407 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624302355] [2020-09-15 13:27:20,407 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-15 13:27:20,408 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:27:20,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-15 13:27:20,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-09-15 13:27:20,408 INFO L87 Difference]: Start difference. First operand 40321 states and 215433 transitions. Second operand 11 states. [2020-09-15 13:27:25,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:27:25,040 INFO L93 Difference]: Finished difference Result 179815 states and 782456 transitions. [2020-09-15 13:27:25,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-09-15 13:27:25,041 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2020-09-15 13:27:25,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:27:25,526 INFO L225 Difference]: With dead ends: 179815 [2020-09-15 13:27:25,526 INFO L226 Difference]: Without dead ends: 179797 [2020-09-15 13:27:25,526 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1545 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=941, Invalid=3751, Unknown=0, NotChecked=0, Total=4692 [2020-09-15 13:27:27,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179797 states. [2020-09-15 13:27:29,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179797 to 40030. [2020-09-15 13:27:29,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40030 states. [2020-09-15 13:27:29,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40030 states to 40030 states and 214096 transitions. [2020-09-15 13:27:29,767 INFO L78 Accepts]: Start accepts. Automaton has 40030 states and 214096 transitions. Word has length 27 [2020-09-15 13:27:29,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:27:29,768 INFO L479 AbstractCegarLoop]: Abstraction has 40030 states and 214096 transitions. [2020-09-15 13:27:29,768 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-15 13:27:29,768 INFO L276 IsEmpty]: Start isEmpty. Operand 40030 states and 214096 transitions. [2020-09-15 13:27:29,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-15 13:27:29,773 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:27:29,773 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:27:29,773 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2020-09-15 13:27:29,774 INFO L427 AbstractCegarLoop]: === Iteration 68 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:27:29,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:27:29,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1385815349, now seen corresponding path program 22 times [2020-09-15 13:27:29,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:27:29,774 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966936395] [2020-09-15 13:27:29,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:27:29,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:27:29,902 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-09-15 13:27:29,902 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966936395] [2020-09-15 13:27:29,902 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 13:27:29,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-09-15 13:27:29,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34121317] [2020-09-15 13:27:29,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-15 13:27:29,903 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:27:29,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-15 13:27:29,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-09-15 13:27:29,904 INFO L87 Difference]: Start difference. First operand 40030 states and 214096 transitions. Second operand 11 states. [2020-09-15 13:27:35,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:27:35,542 INFO L93 Difference]: Finished difference Result 179585 states and 781438 transitions. [2020-09-15 13:27:35,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-09-15 13:27:35,543 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2020-09-15 13:27:35,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:27:36,019 INFO L225 Difference]: With dead ends: 179585 [2020-09-15 13:27:36,019 INFO L226 Difference]: Without dead ends: 179561 [2020-09-15 13:27:36,020 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1535 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=941, Invalid=3751, Unknown=0, NotChecked=0, Total=4692 [2020-09-15 13:27:38,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179561 states. [2020-09-15 13:27:39,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179561 to 39678. [2020-09-15 13:27:39,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39678 states. [2020-09-15 13:27:40,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39678 states to 39678 states and 212301 transitions. [2020-09-15 13:27:40,603 INFO L78 Accepts]: Start accepts. Automaton has 39678 states and 212301 transitions. Word has length 27 [2020-09-15 13:27:40,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:27:40,604 INFO L479 AbstractCegarLoop]: Abstraction has 39678 states and 212301 transitions. [2020-09-15 13:27:40,604 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-15 13:27:40,604 INFO L276 IsEmpty]: Start isEmpty. Operand 39678 states and 212301 transitions. [2020-09-15 13:27:40,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-15 13:27:40,609 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:27:40,609 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:27:40,609 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2020-09-15 13:27:40,609 INFO L427 AbstractCegarLoop]: === Iteration 69 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:27:40,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:27:40,610 INFO L82 PathProgramCache]: Analyzing trace with hash -847392523, now seen corresponding path program 23 times [2020-09-15 13:27:40,610 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:27:40,610 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876027182] [2020-09-15 13:27:40,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:27:40,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:27:40,738 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-09-15 13:27:40,739 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876027182] [2020-09-15 13:27:40,739 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 13:27:40,739 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-09-15 13:27:40,739 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600329216] [2020-09-15 13:27:40,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-15 13:27:40,740 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:27:40,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-15 13:27:40,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-09-15 13:27:40,740 INFO L87 Difference]: Start difference. First operand 39678 states and 212301 transitions. Second operand 11 states. [2020-09-15 13:27:44,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:27:44,776 INFO L93 Difference]: Finished difference Result 179113 states and 779315 transitions. [2020-09-15 13:27:44,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-09-15 13:27:44,777 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2020-09-15 13:27:44,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:27:45,259 INFO L225 Difference]: With dead ends: 179113 [2020-09-15 13:27:45,259 INFO L226 Difference]: Without dead ends: 179095 [2020-09-15 13:27:45,259 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1556 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=941, Invalid=3751, Unknown=0, NotChecked=0, Total=4692 [2020-09-15 13:27:47,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179095 states. [2020-09-15 13:27:49,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179095 to 39387. [2020-09-15 13:27:49,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39387 states. [2020-09-15 13:27:50,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39387 states to 39387 states and 210964 transitions. [2020-09-15 13:27:50,091 INFO L78 Accepts]: Start accepts. Automaton has 39387 states and 210964 transitions. Word has length 27 [2020-09-15 13:27:50,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:27:50,091 INFO L479 AbstractCegarLoop]: Abstraction has 39387 states and 210964 transitions. [2020-09-15 13:27:50,091 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-15 13:27:50,092 INFO L276 IsEmpty]: Start isEmpty. Operand 39387 states and 210964 transitions. [2020-09-15 13:27:50,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-15 13:27:50,096 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:27:50,096 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:27:50,097 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2020-09-15 13:27:50,097 INFO L427 AbstractCegarLoop]: === Iteration 70 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:27:50,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:27:50,097 INFO L82 PathProgramCache]: Analyzing trace with hash -858344203, now seen corresponding path program 24 times [2020-09-15 13:27:50,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:27:50,097 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575719789] [2020-09-15 13:27:50,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:27:50,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:27:50,229 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-09-15 13:27:50,229 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575719789] [2020-09-15 13:27:50,229 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 13:27:50,230 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-09-15 13:27:50,230 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032698369] [2020-09-15 13:27:50,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-15 13:27:50,230 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:27:50,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-15 13:27:50,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-09-15 13:27:50,231 INFO L87 Difference]: Start difference. First operand 39387 states and 210964 transitions. Second operand 11 states. [2020-09-15 13:27:54,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:27:54,262 INFO L93 Difference]: Finished difference Result 178704 states and 777573 transitions. [2020-09-15 13:27:54,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-09-15 13:27:54,263 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2020-09-15 13:27:54,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:27:54,737 INFO L225 Difference]: With dead ends: 178704 [2020-09-15 13:27:54,737 INFO L226 Difference]: Without dead ends: 178675 [2020-09-15 13:27:54,738 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1543 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=941, Invalid=3751, Unknown=0, NotChecked=0, Total=4692 [2020-09-15 13:27:59,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178675 states.