/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-lit/fkp2013_variant-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-b09bf87 [2020-10-16 12:12:49,512 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-16 12:12:49,514 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-16 12:12:49,538 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-16 12:12:49,539 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-16 12:12:49,540 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-16 12:12:49,541 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-16 12:12:49,543 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-16 12:12:49,545 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-16 12:12:49,545 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-16 12:12:49,546 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-16 12:12:49,547 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-16 12:12:49,548 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-16 12:12:49,549 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-16 12:12:49,550 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-16 12:12:49,551 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-16 12:12:49,552 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-16 12:12:49,553 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-16 12:12:49,554 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-16 12:12:49,556 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-16 12:12:49,558 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-16 12:12:49,559 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-16 12:12:49,560 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-16 12:12:49,561 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-16 12:12:49,563 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-16 12:12:49,566 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-16 12:12:49,567 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-16 12:12:49,568 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-16 12:12:49,568 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-16 12:12:49,569 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-16 12:12:49,570 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-16 12:12:49,570 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-16 12:12:49,571 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-16 12:12:49,571 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-16 12:12:49,572 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-16 12:12:49,572 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-16 12:12:49,573 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 [2020-10-16 12:12:49,612 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-16 12:12:49,612 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-16 12:12:49,613 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-16 12:12:49,614 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-16 12:12:49,614 INFO L138 SettingsManager]: * Use SBE=true [2020-10-16 12:12:49,614 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-16 12:12:49,614 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-16 12:12:49,615 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-16 12:12:49,615 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-16 12:12:49,615 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-16 12:12:49,615 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-16 12:12:49,615 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-16 12:12:49,616 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-16 12:12:49,616 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-16 12:12:49,616 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-16 12:12:49,616 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-16 12:12:49,616 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-16 12:12:49,617 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-16 12:12:49,617 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-16 12:12:49,617 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-16 12:12:49,617 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-16 12:12:49,617 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-16 12:12:49,618 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-16 12:12:49,618 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2020-10-16 12:12:49,618 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-16 12:12:49,618 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-16 12:12:49,619 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-16 12:12:49,619 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-10-16 12:12:49,619 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-16 12:12:49,949 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-16 12:12:49,969 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-16 12:12:49,974 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-16 12:12:49,976 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-16 12:12:49,978 INFO L275 PluginConnector]: CDTParser initialized [2020-10-16 12:12:49,979 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-lit/fkp2013_variant-1.i [2020-10-16 12:12:50,060 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0fe526a29/676462ff674b4266b018c78e4fead1c5/FLAGdd922a895 [2020-10-16 12:12:50,628 INFO L306 CDTParser]: Found 1 translation units. [2020-10-16 12:12:50,629 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/pthread-lit/fkp2013_variant-1.i [2020-10-16 12:12:50,647 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0fe526a29/676462ff674b4266b018c78e4fead1c5/FLAGdd922a895 [2020-10-16 12:12:50,975 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0fe526a29/676462ff674b4266b018c78e4fead1c5 [2020-10-16 12:12:50,984 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-16 12:12:50,987 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-16 12:12:50,988 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-16 12:12:50,988 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-16 12:12:50,992 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-16 12:12:50,994 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 12:12:50" (1/1) ... [2020-10-16 12:12:50,997 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56c885b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:12:50, skipping insertion in model container [2020-10-16 12:12:50,997 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 12:12:50" (1/1) ... [2020-10-16 12:12:51,006 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-16 12:12:51,069 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-16 12:12:51,485 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-16 12:12:51,496 INFO L203 MainTranslator]: Completed pre-run [2020-10-16 12:12:51,582 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-16 12:12:51,671 INFO L208 MainTranslator]: Completed translation [2020-10-16 12:12:51,673 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:12:51 WrapperNode [2020-10-16 12:12:51,673 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-16 12:12:51,675 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-16 12:12:51,675 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-16 12:12:51,675 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-16 12:12:51,684 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:12:51" (1/1) ... [2020-10-16 12:12:51,720 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:12:51" (1/1) ... [2020-10-16 12:12:51,745 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-16 12:12:51,746 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-16 12:12:51,746 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-16 12:12:51,746 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-16 12:12:51,756 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:12:51" (1/1) ... [2020-10-16 12:12:51,756 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:12:51" (1/1) ... [2020-10-16 12:12:51,758 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:12:51" (1/1) ... [2020-10-16 12:12:51,759 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:12:51" (1/1) ... [2020-10-16 12:12:51,764 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:12:51" (1/1) ... [2020-10-16 12:12:51,769 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:12:51" (1/1) ... [2020-10-16 12:12:51,771 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:12:51" (1/1) ... [2020-10-16 12:12:51,774 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-16 12:12:51,774 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-16 12:12:51,774 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-16 12:12:51,775 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-16 12:12:51,776 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:12:51" (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 [2020-10-16 12:12:51,852 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2020-10-16 12:12:51,852 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2020-10-16 12:12:51,852 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2020-10-16 12:12:51,852 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2020-10-16 12:12:51,853 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-16 12:12:51,853 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-16 12:12:51,854 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-16 12:12:51,854 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-16 12:12:51,855 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-16 12:12:51,857 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-16 12:12:52,203 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-16 12:12:52,203 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-10-16 12:12:52,205 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 12:12:52 BoogieIcfgContainer [2020-10-16 12:12:52,205 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-16 12:12:52,207 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-16 12:12:52,207 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-16 12:12:52,211 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-16 12:12:52,211 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 12:12:50" (1/3) ... [2020-10-16 12:12:52,212 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3627bf3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 12:12:52, skipping insertion in model container [2020-10-16 12:12:52,212 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:12:51" (2/3) ... [2020-10-16 12:12:52,213 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3627bf3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 12:12:52, skipping insertion in model container [2020-10-16 12:12:52,213 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 12:12:52" (3/3) ... [2020-10-16 12:12:52,215 INFO L111 eAbstractionObserver]: Analyzing ICFG fkp2013_variant-1.i [2020-10-16 12:12:52,228 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-16 12:12:52,229 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-16 12:12:52,237 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-16 12:12:52,238 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-16 12:12:52,267 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:52,267 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:52,268 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:52,268 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:52,269 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:52,269 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:52,269 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:52,270 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:52,270 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:52,271 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:52,271 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:52,271 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:52,272 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:52,272 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:52,273 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:52,273 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:52,273 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:52,273 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:52,274 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:52,274 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:52,274 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:52,278 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:52,279 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:52,279 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:52,280 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:52,280 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:52,280 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:52,288 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:52,288 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:52,289 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:52,289 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:52,289 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:52,293 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-10-16 12:12:52,305 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-10-16 12:12:52,325 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-16 12:12:52,325 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-16 12:12:52,325 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-16 12:12:52,325 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-16 12:12:52,326 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-16 12:12:52,326 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-16 12:12:52,326 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-16 12:12:52,326 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-16 12:12:52,339 INFO L137 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2020-10-16 12:12:52,340 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 64 places, 61 transitions, 132 flow [2020-10-16 12:12:52,342 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 64 places, 61 transitions, 132 flow [2020-10-16 12:12:52,344 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 64 places, 61 transitions, 132 flow [2020-10-16 12:12:52,392 INFO L129 PetriNetUnfolder]: 4/71 cut-off events. [2020-10-16 12:12:52,392 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 12:12:52,398 INFO L80 FinitePrefix]: Finished finitePrefix Result has 79 conditions, 71 events. 4/71 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 94 event pairs, 0 based on Foata normal form. 0/64 useless extension candidates. Maximal degree in co-relation 50. Up to 4 conditions per place. [2020-10-16 12:12:52,401 INFO L117 LiptonReduction]: Number of co-enabled transitions 692 [2020-10-16 12:12:53,570 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2020-10-16 12:12:53,743 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-10-16 12:12:54,195 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 65 [2020-10-16 12:12:54,304 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-16 12:12:54,329 INFO L132 LiptonReduction]: Checked pairs total: 623 [2020-10-16 12:12:54,330 INFO L134 LiptonReduction]: Total number of compositions: 61 [2020-10-16 12:12:54,340 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 18 places, 12 transitions, 34 flow [2020-10-16 12:12:54,356 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-10-16 12:12:54,358 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-10-16 12:12:54,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-10-16 12:12:54,389 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:12:54,390 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-10-16 12:12:54,390 INFO L429 AbstractCegarLoop]: === Iteration 1 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 12:12:54,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:12:54,399 INFO L82 PathProgramCache]: Analyzing trace with hash 245288, now seen corresponding path program 1 times [2020-10-16 12:12:54,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:12:54,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19246807] [2020-10-16 12:12:54,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:12:54,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:12:54,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:12:54,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19246807] [2020-10-16 12:12:54,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 12:12:54,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-10-16 12:12:54,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567557563] [2020-10-16 12:12:54,631 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-16 12:12:54,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:12:54,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-16 12:12:54,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 12:12:54,658 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 3 states. [2020-10-16 12:12:54,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:12:54,711 INFO L93 Difference]: Finished difference Result 35 states and 59 transitions. [2020-10-16 12:12:54,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-16 12:12:54,714 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-10-16 12:12:54,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:12:54,728 INFO L225 Difference]: With dead ends: 35 [2020-10-16 12:12:54,729 INFO L226 Difference]: Without dead ends: 31 [2020-10-16 12:12:54,731 INFO L677 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 [2020-10-16 12:12:54,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-16 12:12:54,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-16 12:12:54,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-16 12:12:54,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 51 transitions. [2020-10-16 12:12:54,779 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 51 transitions. Word has length 3 [2020-10-16 12:12:54,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:12:54,779 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 51 transitions. [2020-10-16 12:12:54,780 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-16 12:12:54,780 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 51 transitions. [2020-10-16 12:12:54,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-10-16 12:12:54,780 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:12:54,781 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:12:54,781 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-16 12:12:54,781 INFO L429 AbstractCegarLoop]: === Iteration 2 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 12:12:54,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:12:54,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1115005406, now seen corresponding path program 1 times [2020-10-16 12:12:54,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:12:54,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029925269] [2020-10-16 12:12:54,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:12:54,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:12:54,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:12:54,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029925269] [2020-10-16 12:12:54,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 12:12:54,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-16 12:12:54,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835206985] [2020-10-16 12:12:54,896 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 12:12:54,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:12:54,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 12:12:54,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-16 12:12:54,898 INFO L87 Difference]: Start difference. First operand 31 states and 51 transitions. Second operand 4 states. [2020-10-16 12:12:54,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:12:54,920 INFO L93 Difference]: Finished difference Result 26 states and 42 transitions. [2020-10-16 12:12:54,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 12:12:54,921 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-10-16 12:12:54,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:12:54,922 INFO L225 Difference]: With dead ends: 26 [2020-10-16 12:12:54,922 INFO L226 Difference]: Without dead ends: 24 [2020-10-16 12:12:54,923 INFO L677 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 [2020-10-16 12:12:54,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-16 12:12:54,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-16 12:12:54,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-16 12:12:54,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 39 transitions. [2020-10-16 12:12:54,928 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 39 transitions. Word has length 7 [2020-10-16 12:12:54,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:12:54,928 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 39 transitions. [2020-10-16 12:12:54,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 12:12:54,928 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 39 transitions. [2020-10-16 12:12:54,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-16 12:12:54,929 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:12:54,929 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2020-10-16 12:12:54,930 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-16 12:12:54,930 INFO L429 AbstractCegarLoop]: === Iteration 3 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 12:12:54,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:12:54,930 INFO L82 PathProgramCache]: Analyzing trace with hash -205446266, now seen corresponding path program 1 times [2020-10-16 12:12:54,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:12:54,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829533686] [2020-10-16 12:12:54,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:12:54,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 12:12:54,955 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 12:12:54,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 12:12:54,971 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 12:12:55,015 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-16 12:12:55,015 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-16 12:12:55,015 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-16 12:12:55,016 WARN L264 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-10-16 12:12:55,017 WARN L371 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2020-10-16 12:12:55,017 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2020-10-16 12:12:55,025 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread2of2ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:55,025 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread2of2ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:55,025 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of2ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:55,026 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of2ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:55,026 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of2ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:55,026 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of2ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:55,026 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of2ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:55,027 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread2of2ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:55,027 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread2of2ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:55,027 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of2ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:55,027 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of2ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:55,027 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of2ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:55,028 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of2ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:55,028 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of2ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:55,028 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of2ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:55,028 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of2ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:55,028 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of2ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:55,029 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of2ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:55,030 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of2ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:55,030 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of2ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:55,030 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:55,030 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:55,030 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of2ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:55,031 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of2ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:55,031 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of2ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:55,031 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of2ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:55,031 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of2ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:55,031 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of2ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:55,032 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of2ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:55,032 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of2ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:55,032 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of2ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:55,033 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of2ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:55,033 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:55,033 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:55,033 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of2ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:55,033 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of2ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:55,033 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of2ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:55,034 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of2ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:55,034 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of2ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:55,048 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of2ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:55,048 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of2ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:55,049 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of2ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:55,049 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of2ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:55,050 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:55,050 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:55,050 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of2ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:55,050 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of2ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:55,050 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of2ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:55,053 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:55,054 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of2ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:55,054 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of2ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:55,054 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of2ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:55,054 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:55,054 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of2ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:55,056 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of2ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:55,056 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of2ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:55,056 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of2ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:55,056 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of2ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:55,057 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of2ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:55,058 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of2ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:55,058 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of2ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:55,058 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread2of2ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:55,059 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of2ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:55,059 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread2of2ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:55,060 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-10-16 12:12:55,060 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-10-16 12:12:55,061 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-16 12:12:55,061 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-16 12:12:55,061 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-16 12:12:55,061 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-16 12:12:55,061 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-16 12:12:55,061 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-16 12:12:55,061 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-16 12:12:55,062 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-16 12:12:55,064 INFO L137 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2020-10-16 12:12:55,064 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 85 places, 79 transitions, 182 flow [2020-10-16 12:12:55,064 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 85 places, 79 transitions, 182 flow [2020-10-16 12:12:55,064 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 85 places, 79 transitions, 182 flow [2020-10-16 12:12:55,085 INFO L129 PetriNetUnfolder]: 5/93 cut-off events. [2020-10-16 12:12:55,086 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2020-10-16 12:12:55,087 INFO L80 FinitePrefix]: Finished finitePrefix Result has 107 conditions, 93 events. 5/93 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 135 event pairs, 0 based on Foata normal form. 0/84 useless extension candidates. Maximal degree in co-relation 102. Up to 6 conditions per place. [2020-10-16 12:12:55,090 INFO L117 LiptonReduction]: Number of co-enabled transitions 1108 [2020-10-16 12:12:56,462 INFO L132 LiptonReduction]: Checked pairs total: 1509 [2020-10-16 12:12:56,462 INFO L134 LiptonReduction]: Total number of compositions: 72 [2020-10-16 12:12:56,462 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 31 places, 21 transitions, 66 flow [2020-10-16 12:12:56,476 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 224 states. [2020-10-16 12:12:56,477 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states. [2020-10-16 12:12:56,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-10-16 12:12:56,477 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:12:56,477 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-10-16 12:12:56,478 INFO L429 AbstractCegarLoop]: === Iteration 1 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:12:56,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:12:56,478 INFO L82 PathProgramCache]: Analyzing trace with hash 412706, now seen corresponding path program 1 times [2020-10-16 12:12:56,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:12:56,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078940338] [2020-10-16 12:12:56,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:12:56,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:12:56,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:12:56,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078940338] [2020-10-16 12:12:56,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 12:12:56,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-10-16 12:12:56,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186442092] [2020-10-16 12:12:56,521 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-16 12:12:56,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:12:56,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-16 12:12:56,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 12:12:56,522 INFO L87 Difference]: Start difference. First operand 224 states. Second operand 3 states. [2020-10-16 12:12:56,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:12:56,559 INFO L93 Difference]: Finished difference Result 185 states and 459 transitions. [2020-10-16 12:12:56,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-16 12:12:56,560 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-10-16 12:12:56,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:12:56,565 INFO L225 Difference]: With dead ends: 185 [2020-10-16 12:12:56,565 INFO L226 Difference]: Without dead ends: 171 [2020-10-16 12:12:56,565 INFO L677 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 [2020-10-16 12:12:56,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-16 12:12:56,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2020-10-16 12:12:56,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-10-16 12:12:56,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 418 transitions. [2020-10-16 12:12:56,592 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 418 transitions. Word has length 3 [2020-10-16 12:12:56,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:12:56,592 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 418 transitions. [2020-10-16 12:12:56,592 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-16 12:12:56,592 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 418 transitions. [2020-10-16 12:12:56,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-16 12:12:56,593 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:12:56,593 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:12:56,593 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-16 12:12:56,594 INFO L429 AbstractCegarLoop]: === Iteration 2 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:12:56,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:12:56,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1644016500, now seen corresponding path program 1 times [2020-10-16 12:12:56,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:12:56,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745844743] [2020-10-16 12:12:56,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:12:56,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:12:56,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:12:56,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745844743] [2020-10-16 12:12:56,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 12:12:56,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 12:12:56,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087968503] [2020-10-16 12:12:56,655 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-16 12:12:56,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:12:56,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-16 12:12:56,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-16 12:12:56,656 INFO L87 Difference]: Start difference. First operand 171 states and 418 transitions. Second operand 5 states. [2020-10-16 12:12:56,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:12:56,764 INFO L93 Difference]: Finished difference Result 225 states and 491 transitions. [2020-10-16 12:12:56,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 12:12:56,766 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2020-10-16 12:12:56,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:12:56,768 INFO L225 Difference]: With dead ends: 225 [2020-10-16 12:12:56,768 INFO L226 Difference]: Without dead ends: 221 [2020-10-16 12:12:56,769 INFO L677 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 [2020-10-16 12:12:56,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-10-16 12:12:56,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 162. [2020-10-16 12:12:56,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-16 12:12:56,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 399 transitions. [2020-10-16 12:12:56,791 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 399 transitions. Word has length 9 [2020-10-16 12:12:56,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:12:56,791 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 399 transitions. [2020-10-16 12:12:56,791 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-16 12:12:56,791 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 399 transitions. [2020-10-16 12:12:56,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 12:12:56,793 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:12:56,793 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:12:56,793 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-16 12:12:56,793 INFO L429 AbstractCegarLoop]: === Iteration 3 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:12:56,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:12:56,794 INFO L82 PathProgramCache]: Analyzing trace with hash 2007179405, now seen corresponding path program 1 times [2020-10-16 12:12:56,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:12:56,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583942351] [2020-10-16 12:12:56,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:12:56,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:12:56,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 12:12:56,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583942351] [2020-10-16 12:12:56,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 12:12:56,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 12:12:56,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579133028] [2020-10-16 12:12:56,850 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-16 12:12:56,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:12:56,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-16 12:12:56,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-16 12:12:56,851 INFO L87 Difference]: Start difference. First operand 162 states and 399 transitions. Second operand 5 states. [2020-10-16 12:12:56,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:12:56,961 INFO L93 Difference]: Finished difference Result 213 states and 458 transitions. [2020-10-16 12:12:56,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 12:12:56,962 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-10-16 12:12:56,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:12:56,964 INFO L225 Difference]: With dead ends: 213 [2020-10-16 12:12:56,965 INFO L226 Difference]: Without dead ends: 209 [2020-10-16 12:12:56,965 INFO L677 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 [2020-10-16 12:12:56,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-10-16 12:12:56,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 153. [2020-10-16 12:12:56,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-16 12:12:56,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 367 transitions. [2020-10-16 12:12:56,980 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 367 transitions. Word has length 13 [2020-10-16 12:12:56,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:12:56,981 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 367 transitions. [2020-10-16 12:12:56,981 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-16 12:12:56,981 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 367 transitions. [2020-10-16 12:12:56,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 12:12:56,983 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:12:56,983 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:12:56,983 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-16 12:12:56,983 INFO L429 AbstractCegarLoop]: === Iteration 4 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:12:56,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:12:56,984 INFO L82 PathProgramCache]: Analyzing trace with hash 2089198851, now seen corresponding path program 1 times [2020-10-16 12:12:56,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:12:56,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998637177] [2020-10-16 12:12:56,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:12:57,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 12:12:57,003 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 12:12:57,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 12:12:57,016 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 12:12:57,023 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-16 12:12:57,023 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-16 12:12:57,024 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-16 12:12:57,024 WARN L264 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-10-16 12:12:57,025 WARN L371 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2020-10-16 12:12:57,026 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2020-10-16 12:12:57,037 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of3ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:57,037 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of3ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:57,037 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of3ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:57,038 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of3ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:57,038 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of3ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:57,038 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of3ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:57,038 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of3ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:57,039 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of3ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:57,039 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of3ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:57,039 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread2of3ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:57,039 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread2of3ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:57,039 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of3ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:57,039 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of3ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:57,040 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of3ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:57,040 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of3ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:57,040 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of3ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:57,040 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread2of3ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:57,040 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread2of3ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:57,041 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread3of3ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:57,041 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread3of3ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:57,041 WARN L313 ript$VariableManager]: TermVariabe thr2Thread3of3ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:57,041 WARN L313 ript$VariableManager]: TermVariabe thr2Thread3of3ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:57,041 WARN L313 ript$VariableManager]: TermVariabe thr2Thread3of3ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:57,042 WARN L313 ript$VariableManager]: TermVariabe thr2Thread3of3ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:57,042 WARN L313 ript$VariableManager]: TermVariabe thr2Thread3of3ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:57,042 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread3of3ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:57,042 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread3of3ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:57,043 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread3of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:57,043 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread3of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:57,043 WARN L313 ript$VariableManager]: TermVariabe thr1Thread3of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:57,043 WARN L313 ript$VariableManager]: TermVariabe thr1Thread3of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:57,044 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread3of3ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:57,044 WARN L313 ript$VariableManager]: TermVariabe thr1Thread3of3ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:57,044 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread3of3ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:57,044 WARN L313 ript$VariableManager]: TermVariabe thr1Thread3of3ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:57,044 WARN L313 ript$VariableManager]: TermVariabe thr1Thread3of3ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:57,045 WARN L313 ript$VariableManager]: TermVariabe thr1Thread3of3ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:57,045 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread3of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:57,045 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread3of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:57,045 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:57,045 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:57,045 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:57,046 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:57,046 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of3ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:57,046 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of3ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:57,046 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of3ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:57,046 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of3ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:57,046 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of3ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:57,046 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of3ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:57,047 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:57,047 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:57,047 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:57,047 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:57,047 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:57,047 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:57,047 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of3ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:57,048 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of3ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:57,048 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of3ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:57,048 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of3ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:57,048 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of3ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:57,048 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of3ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:57,048 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:57,049 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:57,049 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:57,049 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:57,049 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of3ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:57,050 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of3ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:57,050 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:57,050 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:57,054 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of3ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:57,055 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:57,055 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of3ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:57,055 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:57,055 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:57,055 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:57,056 WARN L313 ript$VariableManager]: TermVariabe thr1Thread3of3ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:57,057 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread3of3ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:57,057 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread3of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:57,057 WARN L313 ript$VariableManager]: TermVariabe thr1Thread3of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:57,057 WARN L313 ript$VariableManager]: TermVariabe thr1Thread3of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:57,057 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread3of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:57,059 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of3ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:57,059 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of3ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:57,059 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of3ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:57,059 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of3ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:57,059 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of3ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:57,061 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread2of3ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:57,061 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of3ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:57,061 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of3ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:57,062 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread2of3ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:57,062 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of3ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:57,065 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread3of3ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:57,065 WARN L313 ript$VariableManager]: TermVariabe thr2Thread3of3ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:57,065 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread3of3ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:57,065 WARN L313 ript$VariableManager]: TermVariabe thr2Thread3of3ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:57,066 WARN L313 ript$VariableManager]: TermVariabe thr2Thread3of3ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:12:57,067 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-10-16 12:12:57,067 INFO L253 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2020-10-16 12:12:57,067 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-16 12:12:57,068 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-16 12:12:57,068 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-16 12:12:57,068 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-16 12:12:57,068 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-16 12:12:57,068 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-16 12:12:57,068 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-16 12:12:57,068 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-16 12:12:57,071 INFO L137 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2020-10-16 12:12:57,071 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 106 places, 97 transitions, 236 flow [2020-10-16 12:12:57,071 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 106 places, 97 transitions, 236 flow [2020-10-16 12:12:57,071 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 106 places, 97 transitions, 236 flow [2020-10-16 12:12:57,096 INFO L129 PetriNetUnfolder]: 6/115 cut-off events. [2020-10-16 12:12:57,096 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2020-10-16 12:12:57,099 INFO L80 FinitePrefix]: Finished finitePrefix Result has 136 conditions, 115 events. 6/115 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 174 event pairs, 0 based on Foata normal form. 0/104 useless extension candidates. Maximal degree in co-relation 129. Up to 8 conditions per place. [2020-10-16 12:12:57,103 INFO L117 LiptonReduction]: Number of co-enabled transitions 1608 [2020-10-16 12:12:58,407 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2020-10-16 12:12:58,740 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 72 [2020-10-16 12:12:58,837 INFO L132 LiptonReduction]: Checked pairs total: 2380 [2020-10-16 12:12:58,837 INFO L134 LiptonReduction]: Total number of compositions: 94 [2020-10-16 12:12:58,838 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 41 places, 27 transitions, 96 flow [2020-10-16 12:12:58,874 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 683 states. [2020-10-16 12:12:58,875 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states. [2020-10-16 12:12:58,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-10-16 12:12:58,875 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:12:58,875 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-10-16 12:12:58,876 INFO L429 AbstractCegarLoop]: === Iteration 1 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:12:58,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:12:58,876 INFO L82 PathProgramCache]: Analyzing trace with hash 619488, now seen corresponding path program 1 times [2020-10-16 12:12:58,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:12:58,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732064784] [2020-10-16 12:12:58,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:12:58,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:12:58,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:12:58,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732064784] [2020-10-16 12:12:58,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 12:12:58,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-10-16 12:12:58,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841765198] [2020-10-16 12:12:58,913 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-16 12:12:58,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:12:58,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-16 12:12:58,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 12:12:58,915 INFO L87 Difference]: Start difference. First operand 683 states. Second operand 3 states. [2020-10-16 12:12:58,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:12:58,958 INFO L93 Difference]: Finished difference Result 600 states and 1886 transitions. [2020-10-16 12:12:58,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-16 12:12:58,959 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-10-16 12:12:58,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:12:58,967 INFO L225 Difference]: With dead ends: 600 [2020-10-16 12:12:58,967 INFO L226 Difference]: Without dead ends: 559 [2020-10-16 12:12:58,968 INFO L677 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 [2020-10-16 12:12:58,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2020-10-16 12:12:59,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 559. [2020-10-16 12:12:59,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 559 states. [2020-10-16 12:12:59,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 1737 transitions. [2020-10-16 12:12:59,028 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 1737 transitions. Word has length 3 [2020-10-16 12:12:59,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:12:59,028 INFO L481 AbstractCegarLoop]: Abstraction has 559 states and 1737 transitions. [2020-10-16 12:12:59,029 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-16 12:12:59,029 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 1737 transitions. [2020-10-16 12:12:59,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-16 12:12:59,030 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:12:59,030 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:12:59,030 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-16 12:12:59,030 INFO L429 AbstractCegarLoop]: === Iteration 2 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:12:59,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:12:59,031 INFO L82 PathProgramCache]: Analyzing trace with hash -760522402, now seen corresponding path program 1 times [2020-10-16 12:12:59,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:12:59,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265976156] [2020-10-16 12:12:59,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:12:59,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:12:59,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:12:59,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265976156] [2020-10-16 12:12:59,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 12:12:59,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 12:12:59,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493781881] [2020-10-16 12:12:59,111 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-16 12:12:59,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:12:59,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-16 12:12:59,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-16 12:12:59,111 INFO L87 Difference]: Start difference. First operand 559 states and 1737 transitions. Second operand 5 states. [2020-10-16 12:12:59,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:12:59,208 INFO L93 Difference]: Finished difference Result 933 states and 2580 transitions. [2020-10-16 12:12:59,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 12:12:59,208 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2020-10-16 12:12:59,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:12:59,216 INFO L225 Difference]: With dead ends: 933 [2020-10-16 12:12:59,217 INFO L226 Difference]: Without dead ends: 928 [2020-10-16 12:12:59,217 INFO L677 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 [2020-10-16 12:12:59,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 928 states. [2020-10-16 12:12:59,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 928 to 585. [2020-10-16 12:12:59,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 585 states. [2020-10-16 12:12:59,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 1832 transitions. [2020-10-16 12:12:59,249 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 1832 transitions. Word has length 9 [2020-10-16 12:12:59,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:12:59,250 INFO L481 AbstractCegarLoop]: Abstraction has 585 states and 1832 transitions. [2020-10-16 12:12:59,250 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-16 12:12:59,250 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 1832 transitions. [2020-10-16 12:12:59,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 12:12:59,251 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:12:59,251 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:12:59,252 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-16 12:12:59,252 INFO L429 AbstractCegarLoop]: === Iteration 3 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:12:59,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:12:59,252 INFO L82 PathProgramCache]: Analyzing trace with hash -146499013, now seen corresponding path program 1 times [2020-10-16 12:12:59,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:12:59,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754704422] [2020-10-16 12:12:59,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:12:59,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:12:59,301 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 12:12:59,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754704422] [2020-10-16 12:12:59,302 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 12:12:59,302 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 12:12:59,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928296680] [2020-10-16 12:12:59,303 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-16 12:12:59,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:12:59,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-16 12:12:59,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-16 12:12:59,305 INFO L87 Difference]: Start difference. First operand 585 states and 1832 transitions. Second operand 5 states. [2020-10-16 12:12:59,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:12:59,405 INFO L93 Difference]: Finished difference Result 963 states and 2673 transitions. [2020-10-16 12:12:59,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 12:12:59,406 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-10-16 12:12:59,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:12:59,414 INFO L225 Difference]: With dead ends: 963 [2020-10-16 12:12:59,414 INFO L226 Difference]: Without dead ends: 956 [2020-10-16 12:12:59,415 INFO L677 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 [2020-10-16 12:12:59,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 956 states. [2020-10-16 12:12:59,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 956 to 611. [2020-10-16 12:12:59,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 611 states. [2020-10-16 12:12:59,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 611 states to 611 states and 1906 transitions. [2020-10-16 12:12:59,452 INFO L78 Accepts]: Start accepts. Automaton has 611 states and 1906 transitions. Word has length 13 [2020-10-16 12:12:59,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:12:59,452 INFO L481 AbstractCegarLoop]: Abstraction has 611 states and 1906 transitions. [2020-10-16 12:12:59,452 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-16 12:12:59,452 INFO L276 IsEmpty]: Start isEmpty. Operand 611 states and 1906 transitions. [2020-10-16 12:12:59,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-16 12:12:59,457 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:12:59,457 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:12:59,457 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-16 12:12:59,458 INFO L429 AbstractCegarLoop]: === Iteration 4 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:12:59,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:12:59,458 INFO L82 PathProgramCache]: Analyzing trace with hash 141115969, now seen corresponding path program 1 times [2020-10-16 12:12:59,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:12:59,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59783175] [2020-10-16 12:12:59,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:12:59,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:12:59,606 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:12:59,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59783175] [2020-10-16 12:12:59,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385403917] [2020-10-16 12:12:59,607 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 [2020-10-16 12:12:59,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:12:59,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 12:12:59,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:12:59,834 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:12:59,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:12:59,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 12:12:59,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068912208] [2020-10-16 12:12:59,836 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 12:12:59,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:12:59,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 12:12:59,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-10-16 12:12:59,837 INFO L87 Difference]: Start difference. First operand 611 states and 1906 transitions. Second operand 17 states. [2020-10-16 12:13:00,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:13:00,981 INFO L93 Difference]: Finished difference Result 2465 states and 6372 transitions. [2020-10-16 12:13:00,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-16 12:13:00,982 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 15 [2020-10-16 12:13:00,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:13:01,002 INFO L225 Difference]: With dead ends: 2465 [2020-10-16 12:13:01,002 INFO L226 Difference]: Without dead ends: 2458 [2020-10-16 12:13:01,004 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=479, Invalid=1683, Unknown=0, NotChecked=0, Total=2162 [2020-10-16 12:13:01,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2458 states. [2020-10-16 12:13:01,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2458 to 661. [2020-10-16 12:13:01,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 661 states. [2020-10-16 12:13:01,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 661 states to 661 states and 2106 transitions. [2020-10-16 12:13:01,083 INFO L78 Accepts]: Start accepts. Automaton has 661 states and 2106 transitions. Word has length 15 [2020-10-16 12:13:01,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:13:01,084 INFO L481 AbstractCegarLoop]: Abstraction has 661 states and 2106 transitions. [2020-10-16 12:13:01,084 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 12:13:01,084 INFO L276 IsEmpty]: Start isEmpty. Operand 661 states and 2106 transitions. [2020-10-16 12:13:01,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-16 12:13:01,086 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:13:01,087 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:13:01,300 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-10-16 12:13:01,301 INFO L429 AbstractCegarLoop]: === Iteration 5 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:13:01,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:13:01,301 INFO L82 PathProgramCache]: Analyzing trace with hash 684503809, now seen corresponding path program 2 times [2020-10-16 12:13:01,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:13:01,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715177662] [2020-10-16 12:13:01,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:13:01,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:13:01,431 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:13:01,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715177662] [2020-10-16 12:13:01,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539904017] [2020-10-16 12:13:01,432 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 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:13:01,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 12:13:01,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:13:01,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 12:13:01,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:13:01,623 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:13:01,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:13:01,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 12:13:01,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924803464] [2020-10-16 12:13:01,624 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 12:13:01,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:13:01,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 12:13:01,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2020-10-16 12:13:01,625 INFO L87 Difference]: Start difference. First operand 661 states and 2106 transitions. Second operand 17 states. [2020-10-16 12:13:02,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:13:02,515 INFO L93 Difference]: Finished difference Result 1570 states and 4030 transitions. [2020-10-16 12:13:02,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-16 12:13:02,516 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 15 [2020-10-16 12:13:02,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:13:02,531 INFO L225 Difference]: With dead ends: 1570 [2020-10-16 12:13:02,531 INFO L226 Difference]: Without dead ends: 1563 [2020-10-16 12:13:02,532 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=339, Invalid=1221, Unknown=0, NotChecked=0, Total=1560 [2020-10-16 12:13:02,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1563 states. [2020-10-16 12:13:02,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1563 to 656. [2020-10-16 12:13:02,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 656 states. [2020-10-16 12:13:02,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 656 states to 656 states and 2086 transitions. [2020-10-16 12:13:02,583 INFO L78 Accepts]: Start accepts. Automaton has 656 states and 2086 transitions. Word has length 15 [2020-10-16 12:13:02,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:13:02,583 INFO L481 AbstractCegarLoop]: Abstraction has 656 states and 2086 transitions. [2020-10-16 12:13:02,583 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 12:13:02,584 INFO L276 IsEmpty]: Start isEmpty. Operand 656 states and 2086 transitions. [2020-10-16 12:13:02,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-16 12:13:02,585 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:13:02,585 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:13:02,800 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-10-16 12:13:02,800 INFO L429 AbstractCegarLoop]: === Iteration 6 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:13:02,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:13:02,801 INFO L82 PathProgramCache]: Analyzing trace with hash -174965367, now seen corresponding path program 3 times [2020-10-16 12:13:02,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:13:02,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625526138] [2020-10-16 12:13:02,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:13:02,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:13:02,875 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:13:02,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625526138] [2020-10-16 12:13:02,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277745715] [2020-10-16 12:13:02,876 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:13:02,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 12:13:02,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:13:02,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 12:13:02,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:13:03,093 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:13:03,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:13:03,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 12:13:03,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220082355] [2020-10-16 12:13:03,094 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 12:13:03,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:13:03,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 12:13:03,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2020-10-16 12:13:03,095 INFO L87 Difference]: Start difference. First operand 656 states and 2086 transitions. Second operand 17 states. [2020-10-16 12:13:03,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:13:03,992 INFO L93 Difference]: Finished difference Result 1385 states and 3506 transitions. [2020-10-16 12:13:03,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-16 12:13:03,992 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 15 [2020-10-16 12:13:03,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:13:04,006 INFO L225 Difference]: With dead ends: 1385 [2020-10-16 12:13:04,006 INFO L226 Difference]: Without dead ends: 1379 [2020-10-16 12:13:04,011 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=372, Invalid=1434, Unknown=0, NotChecked=0, Total=1806 [2020-10-16 12:13:04,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1379 states. [2020-10-16 12:13:04,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1379 to 620. [2020-10-16 12:13:04,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 620 states. [2020-10-16 12:13:04,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 1966 transitions. [2020-10-16 12:13:04,043 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 1966 transitions. Word has length 15 [2020-10-16 12:13:04,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:13:04,044 INFO L481 AbstractCegarLoop]: Abstraction has 620 states and 1966 transitions. [2020-10-16 12:13:04,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 12:13:04,044 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 1966 transitions. [2020-10-16 12:13:04,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-16 12:13:04,045 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:13:04,045 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:13:04,259 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-16 12:13:04,260 INFO L429 AbstractCegarLoop]: === Iteration 7 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:13:04,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:13:04,261 INFO L82 PathProgramCache]: Analyzing trace with hash 948378311, now seen corresponding path program 4 times [2020-10-16 12:13:04,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:13:04,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511066385] [2020-10-16 12:13:04,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:13:04,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:13:04,352 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:13:04,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511066385] [2020-10-16 12:13:04,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779951037] [2020-10-16 12:13:04,353 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:13:04,424 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 12:13:04,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:13:04,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 12:13:04,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:13:04,565 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:13:04,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:13:04,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 12:13:04,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466075551] [2020-10-16 12:13:04,567 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 12:13:04,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:13:04,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 12:13:04,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2020-10-16 12:13:04,568 INFO L87 Difference]: Start difference. First operand 620 states and 1966 transitions. Second operand 17 states. [2020-10-16 12:13:05,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:13:05,484 INFO L93 Difference]: Finished difference Result 1857 states and 4789 transitions. [2020-10-16 12:13:05,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-16 12:13:05,485 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 15 [2020-10-16 12:13:05,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:13:05,500 INFO L225 Difference]: With dead ends: 1857 [2020-10-16 12:13:05,500 INFO L226 Difference]: Without dead ends: 1845 [2020-10-16 12:13:05,502 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=410, Invalid=1396, Unknown=0, NotChecked=0, Total=1806 [2020-10-16 12:13:05,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1845 states. [2020-10-16 12:13:05,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1845 to 565. [2020-10-16 12:13:05,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 565 states. [2020-10-16 12:13:05,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 1814 transitions. [2020-10-16 12:13:05,545 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 1814 transitions. Word has length 15 [2020-10-16 12:13:05,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:13:05,546 INFO L481 AbstractCegarLoop]: Abstraction has 565 states and 1814 transitions. [2020-10-16 12:13:05,546 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 12:13:05,546 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 1814 transitions. [2020-10-16 12:13:05,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 12:13:05,547 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:13:05,548 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:13:05,761 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:13:05,761 INFO L429 AbstractCegarLoop]: === Iteration 8 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:13:05,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:13:05,762 INFO L82 PathProgramCache]: Analyzing trace with hash 244770691, now seen corresponding path program 1 times [2020-10-16 12:13:05,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:13:05,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155542739] [2020-10-16 12:13:05,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:13:05,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:13:05,807 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-16 12:13:05,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155542739] [2020-10-16 12:13:05,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 12:13:05,808 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 12:13:05,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652616786] [2020-10-16 12:13:05,808 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-16 12:13:05,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:13:05,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-16 12:13:05,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-16 12:13:05,809 INFO L87 Difference]: Start difference. First operand 565 states and 1814 transitions. Second operand 5 states. [2020-10-16 12:13:05,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:13:05,897 INFO L93 Difference]: Finished difference Result 889 states and 2517 transitions. [2020-10-16 12:13:05,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 12:13:05,898 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-10-16 12:13:05,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:13:05,903 INFO L225 Difference]: With dead ends: 889 [2020-10-16 12:13:05,904 INFO L226 Difference]: Without dead ends: 881 [2020-10-16 12:13:05,904 INFO L677 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 [2020-10-16 12:13:05,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 881 states. [2020-10-16 12:13:05,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 881 to 575. [2020-10-16 12:13:05,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 575 states. [2020-10-16 12:13:05,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 1796 transitions. [2020-10-16 12:13:05,926 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 1796 transitions. Word has length 17 [2020-10-16 12:13:05,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:13:05,926 INFO L481 AbstractCegarLoop]: Abstraction has 575 states and 1796 transitions. [2020-10-16 12:13:05,926 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-16 12:13:05,926 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 1796 transitions. [2020-10-16 12:13:05,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-16 12:13:05,927 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:13:05,928 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:13:05,928 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-16 12:13:05,928 INFO L429 AbstractCegarLoop]: === Iteration 9 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 12:13:05,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:13:05,928 INFO L82 PathProgramCache]: Analyzing trace with hash -1006694159, now seen corresponding path program 1 times [2020-10-16 12:13:05,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:13:05,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903718521] [2020-10-16 12:13:05,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:13:05,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 12:13:05,940 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 12:13:05,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 12:13:05,948 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 12:13:05,955 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-16 12:13:05,955 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-16 12:13:05,955 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-16 12:13:05,956 WARN L264 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-10-16 12:13:05,956 WARN L371 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2020-10-16 12:13:05,956 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2020-10-16 12:13:05,969 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of4ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,969 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of4ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,969 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of4ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,969 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of4ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,970 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of4ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,970 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of4ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,970 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of4ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,970 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of4ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,970 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of4ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,970 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread4of4ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,970 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread4of4ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,971 WARN L313 ript$VariableManager]: TermVariabe thr2Thread4of4ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,971 WARN L313 ript$VariableManager]: TermVariabe thr2Thread4of4ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,971 WARN L313 ript$VariableManager]: TermVariabe thr2Thread4of4ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,971 WARN L313 ript$VariableManager]: TermVariabe thr2Thread4of4ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,971 WARN L313 ript$VariableManager]: TermVariabe thr2Thread4of4ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,971 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread4of4ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,971 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread4of4ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,972 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread3of4ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,972 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread3of4ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,972 WARN L313 ript$VariableManager]: TermVariabe thr2Thread3of4ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,972 WARN L313 ript$VariableManager]: TermVariabe thr2Thread3of4ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,972 WARN L313 ript$VariableManager]: TermVariabe thr2Thread3of4ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,972 WARN L313 ript$VariableManager]: TermVariabe thr2Thread3of4ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,972 WARN L313 ript$VariableManager]: TermVariabe thr2Thread3of4ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,973 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread3of4ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,973 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread3of4ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,973 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread2of4ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,973 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread2of4ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,973 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of4ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,973 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of4ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,973 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of4ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,974 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of4ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,974 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of4ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,974 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread2of4ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,974 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread2of4ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,974 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread3of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,974 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread3of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,975 WARN L313 ript$VariableManager]: TermVariabe thr1Thread3of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,975 WARN L313 ript$VariableManager]: TermVariabe thr1Thread3of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,975 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread3of4ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,975 WARN L313 ript$VariableManager]: TermVariabe thr1Thread3of4ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,975 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread3of4ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,975 WARN L313 ript$VariableManager]: TermVariabe thr1Thread3of4ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,975 WARN L313 ript$VariableManager]: TermVariabe thr1Thread3of4ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,976 WARN L313 ript$VariableManager]: TermVariabe thr1Thread3of4ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,976 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread3of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,976 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread3of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,976 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread4of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,976 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread4of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,976 WARN L313 ript$VariableManager]: TermVariabe thr1Thread4of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,977 WARN L313 ript$VariableManager]: TermVariabe thr1Thread4of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,977 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread4of4ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,977 WARN L313 ript$VariableManager]: TermVariabe thr1Thread4of4ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,977 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread4of4ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,977 WARN L313 ript$VariableManager]: TermVariabe thr1Thread4of4ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,977 WARN L313 ript$VariableManager]: TermVariabe thr1Thread4of4ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,977 WARN L313 ript$VariableManager]: TermVariabe thr1Thread4of4ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,978 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread4of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,978 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread4of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,978 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,978 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,978 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,979 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,979 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of4ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,979 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of4ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,979 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of4ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,979 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of4ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,979 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of4ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,979 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of4ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,980 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,980 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,980 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,980 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,980 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,980 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,981 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of4ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,981 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of4ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,981 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of4ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,981 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of4ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,981 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of4ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,981 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of4ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,981 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,982 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,982 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,982 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,982 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of4ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,983 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,983 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,983 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of4ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,987 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of4ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,988 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,988 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,988 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,988 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,988 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of4ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,989 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread3of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,989 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread3of4ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,990 WARN L313 ript$VariableManager]: TermVariabe thr1Thread3of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,990 WARN L313 ript$VariableManager]: TermVariabe thr1Thread3of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,990 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread3of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,990 WARN L313 ript$VariableManager]: TermVariabe thr1Thread3of4ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,991 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread4of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,991 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread4of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,991 WARN L313 ript$VariableManager]: TermVariabe thr1Thread4of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,991 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread4of4ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,992 WARN L313 ript$VariableManager]: TermVariabe thr1Thread4of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,992 WARN L313 ript$VariableManager]: TermVariabe thr1Thread4of4ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,993 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of4ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,993 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of4ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,993 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of4ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,993 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of4ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,993 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of4ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,994 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of4ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,994 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of4ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,995 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of4ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,995 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread2of4ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,995 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread2of4ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,996 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread3of4ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,996 WARN L313 ript$VariableManager]: TermVariabe thr2Thread3of4ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,996 WARN L313 ript$VariableManager]: TermVariabe thr2Thread3of4ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,996 WARN L313 ript$VariableManager]: TermVariabe thr2Thread3of4ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,996 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread3of4ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,997 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread4of4ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,998 WARN L313 ript$VariableManager]: TermVariabe thr2Thread4of4ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,998 WARN L313 ript$VariableManager]: TermVariabe thr2Thread4of4ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,998 WARN L313 ript$VariableManager]: TermVariabe thr2Thread4of4ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:05,998 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread4of4ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:13:06,000 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-10-16 12:13:06,000 INFO L253 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2020-10-16 12:13:06,000 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-16 12:13:06,000 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-16 12:13:06,000 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-16 12:13:06,000 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-16 12:13:06,001 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-16 12:13:06,001 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-16 12:13:06,001 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-16 12:13:06,001 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-16 12:13:06,002 INFO L137 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2020-10-16 12:13:06,003 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 127 places, 115 transitions, 294 flow [2020-10-16 12:13:06,003 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 127 places, 115 transitions, 294 flow [2020-10-16 12:13:06,003 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 127 places, 115 transitions, 294 flow [2020-10-16 12:13:06,025 INFO L129 PetriNetUnfolder]: 7/137 cut-off events. [2020-10-16 12:13:06,025 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2020-10-16 12:13:06,027 INFO L80 FinitePrefix]: Finished finitePrefix Result has 166 conditions, 137 events. 7/137 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 234 event pairs, 0 based on Foata normal form. 0/124 useless extension candidates. Maximal degree in co-relation 157. Up to 10 conditions per place. [2020-10-16 12:13:06,031 INFO L117 LiptonReduction]: Number of co-enabled transitions 2192 [2020-10-16 12:13:07,719 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2020-10-16 12:13:07,952 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 66 [2020-10-16 12:13:08,037 INFO L132 LiptonReduction]: Checked pairs total: 3160 [2020-10-16 12:13:08,037 INFO L134 LiptonReduction]: Total number of compositions: 107 [2020-10-16 12:13:08,038 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 51 places, 33 transitions, 130 flow [2020-10-16 12:13:08,166 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 2060 states. [2020-10-16 12:13:08,166 INFO L276 IsEmpty]: Start isEmpty. Operand 2060 states. [2020-10-16 12:13:08,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-10-16 12:13:08,167 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:13:08,167 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-10-16 12:13:08,167 INFO L429 AbstractCegarLoop]: === Iteration 1 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 12:13:08,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:13:08,168 INFO L82 PathProgramCache]: Analyzing trace with hash 857348, now seen corresponding path program 1 times [2020-10-16 12:13:08,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:13:08,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349585573] [2020-10-16 12:13:08,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:13:08,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:13:08,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:13:08,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349585573] [2020-10-16 12:13:08,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 12:13:08,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-10-16 12:13:08,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348820420] [2020-10-16 12:13:08,187 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-16 12:13:08,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:13:08,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-16 12:13:08,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 12:13:08,188 INFO L87 Difference]: Start difference. First operand 2060 states. Second operand 3 states. [2020-10-16 12:13:08,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:13:08,228 INFO L93 Difference]: Finished difference Result 1889 states and 7217 transitions. [2020-10-16 12:13:08,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-16 12:13:08,228 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-10-16 12:13:08,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:13:08,243 INFO L225 Difference]: With dead ends: 1889 [2020-10-16 12:13:08,243 INFO L226 Difference]: Without dead ends: 1767 [2020-10-16 12:13:08,244 INFO L677 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 [2020-10-16 12:13:08,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1767 states. [2020-10-16 12:13:08,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1767 to 1767. [2020-10-16 12:13:08,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1767 states. [2020-10-16 12:13:08,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1767 states to 1767 states and 6690 transitions. [2020-10-16 12:13:08,342 INFO L78 Accepts]: Start accepts. Automaton has 1767 states and 6690 transitions. Word has length 3 [2020-10-16 12:13:08,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:13:08,342 INFO L481 AbstractCegarLoop]: Abstraction has 1767 states and 6690 transitions. [2020-10-16 12:13:08,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-16 12:13:08,342 INFO L276 IsEmpty]: Start isEmpty. Operand 1767 states and 6690 transitions. [2020-10-16 12:13:08,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-16 12:13:08,343 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:13:08,343 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:13:08,343 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-16 12:13:08,343 INFO L429 AbstractCegarLoop]: === Iteration 2 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 12:13:08,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:13:08,344 INFO L82 PathProgramCache]: Analyzing trace with hash -1063852733, now seen corresponding path program 1 times [2020-10-16 12:13:08,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:13:08,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022119781] [2020-10-16 12:13:08,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:13:08,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:13:08,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:13:08,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022119781] [2020-10-16 12:13:08,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 12:13:08,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 12:13:08,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14383965] [2020-10-16 12:13:08,387 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-16 12:13:08,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:13:08,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-16 12:13:08,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-16 12:13:08,387 INFO L87 Difference]: Start difference. First operand 1767 states and 6690 transitions. Second operand 5 states. [2020-10-16 12:13:08,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:13:08,492 INFO L93 Difference]: Finished difference Result 3381 states and 11559 transitions. [2020-10-16 12:13:08,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 12:13:08,493 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2020-10-16 12:13:08,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:13:08,536 INFO L225 Difference]: With dead ends: 3381 [2020-10-16 12:13:08,536 INFO L226 Difference]: Without dead ends: 3375 [2020-10-16 12:13:08,536 INFO L677 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 [2020-10-16 12:13:08,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3375 states. [2020-10-16 12:13:08,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3375 to 1966. [2020-10-16 12:13:08,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1966 states. [2020-10-16 12:13:08,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1966 states to 1966 states and 7503 transitions. [2020-10-16 12:13:08,628 INFO L78 Accepts]: Start accepts. Automaton has 1966 states and 7503 transitions. Word has length 9 [2020-10-16 12:13:08,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:13:08,629 INFO L481 AbstractCegarLoop]: Abstraction has 1966 states and 7503 transitions. [2020-10-16 12:13:08,629 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-16 12:13:08,629 INFO L276 IsEmpty]: Start isEmpty. Operand 1966 states and 7503 transitions. [2020-10-16 12:13:08,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 12:13:08,629 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:13:08,630 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:13:08,630 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-16 12:13:08,630 INFO L429 AbstractCegarLoop]: === Iteration 3 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 12:13:08,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:13:08,630 INFO L82 PathProgramCache]: Analyzing trace with hash 2048649897, now seen corresponding path program 1 times [2020-10-16 12:13:08,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:13:08,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276348374] [2020-10-16 12:13:08,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:13:08,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:13:08,676 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 12:13:08,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276348374] [2020-10-16 12:13:08,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 12:13:08,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 12:13:08,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930600566] [2020-10-16 12:13:08,677 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-16 12:13:08,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:13:08,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-16 12:13:08,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-16 12:13:08,678 INFO L87 Difference]: Start difference. First operand 1966 states and 7503 transitions. Second operand 5 states. [2020-10-16 12:13:08,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:13:08,797 INFO L93 Difference]: Finished difference Result 3684 states and 12737 transitions. [2020-10-16 12:13:08,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 12:13:08,797 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-10-16 12:13:08,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:13:08,810 INFO L225 Difference]: With dead ends: 3684 [2020-10-16 12:13:08,811 INFO L226 Difference]: Without dead ends: 3674 [2020-10-16 12:13:08,811 INFO L677 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 [2020-10-16 12:13:08,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3674 states. [2020-10-16 12:13:08,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3674 to 2200. [2020-10-16 12:13:08,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2200 states. [2020-10-16 12:13:08,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2200 states to 2200 states and 8453 transitions. [2020-10-16 12:13:08,904 INFO L78 Accepts]: Start accepts. Automaton has 2200 states and 8453 transitions. Word has length 13 [2020-10-16 12:13:08,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:13:08,904 INFO L481 AbstractCegarLoop]: Abstraction has 2200 states and 8453 transitions. [2020-10-16 12:13:08,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-16 12:13:08,904 INFO L276 IsEmpty]: Start isEmpty. Operand 2200 states and 8453 transitions. [2020-10-16 12:13:08,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-16 12:13:08,905 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:13:08,905 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:13:08,905 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-16 12:13:08,906 INFO L429 AbstractCegarLoop]: === Iteration 4 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 12:13:08,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:13:08,906 INFO L82 PathProgramCache]: Analyzing trace with hash 119106913, now seen corresponding path program 1 times [2020-10-16 12:13:08,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:13:08,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005509998] [2020-10-16 12:13:08,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:13:08,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:13:08,976 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:13:08,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005509998] [2020-10-16 12:13:08,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243820723] [2020-10-16 12:13:08,977 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 [2020-10-16 12:13:09,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:13:09,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 12:13:09,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:13:09,237 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:13:09,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:13:09,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-10-16 12:13:09,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514092969] [2020-10-16 12:13:09,239 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 12:13:09,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:13:09,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 12:13:09,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2020-10-16 12:13:09,241 INFO L87 Difference]: Start difference. First operand 2200 states and 8453 transitions. Second operand 18 states. [2020-10-16 12:13:10,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:13:10,384 INFO L93 Difference]: Finished difference Result 6074 states and 18774 transitions. [2020-10-16 12:13:10,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-16 12:13:10,384 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 15 [2020-10-16 12:13:10,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:13:10,406 INFO L225 Difference]: With dead ends: 6074 [2020-10-16 12:13:10,406 INFO L226 Difference]: Without dead ends: 6065 [2020-10-16 12:13:10,407 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=376, Invalid=1430, Unknown=0, NotChecked=0, Total=1806 [2020-10-16 12:13:10,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6065 states. [2020-10-16 12:13:10,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6065 to 2184. [2020-10-16 12:13:10,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2184 states. [2020-10-16 12:13:10,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2184 states to 2184 states and 8378 transitions. [2020-10-16 12:13:10,526 INFO L78 Accepts]: Start accepts. Automaton has 2184 states and 8378 transitions. Word has length 15 [2020-10-16 12:13:10,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:13:10,526 INFO L481 AbstractCegarLoop]: Abstraction has 2184 states and 8378 transitions. [2020-10-16 12:13:10,526 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 12:13:10,526 INFO L276 IsEmpty]: Start isEmpty. Operand 2184 states and 8378 transitions. [2020-10-16 12:13:10,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-16 12:13:10,527 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:13:10,527 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:13:10,740 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:13:10,741 INFO L429 AbstractCegarLoop]: === Iteration 5 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 12:13:10,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:13:10,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1657522145, now seen corresponding path program 2 times [2020-10-16 12:13:10,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:13:10,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854722384] [2020-10-16 12:13:10,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:13:10,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:13:10,824 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:13:10,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854722384] [2020-10-16 12:13:10,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000018050] [2020-10-16 12:13:10,825 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 [2020-10-16 12:13:10,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 12:13:10,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:13:10,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 12:13:10,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:13:11,002 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:13:11,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:13:11,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-10-16 12:13:11,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161403103] [2020-10-16 12:13:11,003 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 12:13:11,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:13:11,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 12:13:11,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2020-10-16 12:13:11,004 INFO L87 Difference]: Start difference. First operand 2184 states and 8378 transitions. Second operand 18 states. [2020-10-16 12:13:11,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:13:11,881 INFO L93 Difference]: Finished difference Result 7978 states and 25385 transitions. [2020-10-16 12:13:11,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-16 12:13:11,882 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 15 [2020-10-16 12:13:11,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:13:11,905 INFO L225 Difference]: With dead ends: 7978 [2020-10-16 12:13:11,905 INFO L226 Difference]: Without dead ends: 7967 [2020-10-16 12:13:11,907 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=373, Invalid=1267, Unknown=0, NotChecked=0, Total=1640 [2020-10-16 12:13:12,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7967 states. [2020-10-16 12:13:12,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7967 to 2062. [2020-10-16 12:13:12,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2062 states. [2020-10-16 12:13:12,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2062 states to 2062 states and 7945 transitions. [2020-10-16 12:13:12,093 INFO L78 Accepts]: Start accepts. Automaton has 2062 states and 7945 transitions. Word has length 15 [2020-10-16 12:13:12,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:13:12,093 INFO L481 AbstractCegarLoop]: Abstraction has 2062 states and 7945 transitions. [2020-10-16 12:13:12,093 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 12:13:12,094 INFO L276 IsEmpty]: Start isEmpty. Operand 2062 states and 7945 transitions. [2020-10-16 12:13:12,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 12:13:12,094 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:13:12,095 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:13:12,308 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:13:12,308 INFO L429 AbstractCegarLoop]: === Iteration 6 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 12:13:12,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:13:12,309 INFO L82 PathProgramCache]: Analyzing trace with hash -308621917, now seen corresponding path program 1 times [2020-10-16 12:13:12,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:13:12,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714238983] [2020-10-16 12:13:12,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:13:12,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:13:12,359 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-16 12:13:12,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714238983] [2020-10-16 12:13:12,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 12:13:12,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 12:13:12,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160467880] [2020-10-16 12:13:12,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-16 12:13:12,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:13:12,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-16 12:13:12,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-16 12:13:12,361 INFO L87 Difference]: Start difference. First operand 2062 states and 7945 transitions. Second operand 5 states. [2020-10-16 12:13:12,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:13:12,491 INFO L93 Difference]: Finished difference Result 3783 states and 13239 transitions. [2020-10-16 12:13:12,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 12:13:12,492 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-10-16 12:13:12,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:13:12,505 INFO L225 Difference]: With dead ends: 3783 [2020-10-16 12:13:12,506 INFO L226 Difference]: Without dead ends: 3768 [2020-10-16 12:13:12,506 INFO L677 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 [2020-10-16 12:13:12,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3768 states. [2020-10-16 12:13:12,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3768 to 2298. [2020-10-16 12:13:12,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2298 states. [2020-10-16 12:13:12,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2298 states to 2298 states and 8830 transitions. [2020-10-16 12:13:12,610 INFO L78 Accepts]: Start accepts. Automaton has 2298 states and 8830 transitions. Word has length 17 [2020-10-16 12:13:12,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:13:12,610 INFO L481 AbstractCegarLoop]: Abstraction has 2298 states and 8830 transitions. [2020-10-16 12:13:12,611 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-16 12:13:12,611 INFO L276 IsEmpty]: Start isEmpty. Operand 2298 states and 8830 transitions. [2020-10-16 12:13:12,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 12:13:12,612 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:13:12,612 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:13:12,612 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-16 12:13:12,612 INFO L429 AbstractCegarLoop]: === Iteration 7 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 12:13:12,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:13:12,613 INFO L82 PathProgramCache]: Analyzing trace with hash -433572773, now seen corresponding path program 1 times [2020-10-16 12:13:12,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:13:12,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398002621] [2020-10-16 12:13:12,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:13:12,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:13:12,694 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:13:12,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398002621] [2020-10-16 12:13:12,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849530675] [2020-10-16 12:13:12,695 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:13:12,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:13:12,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 12:13:12,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:13:12,910 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:13:12,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:13:12,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2020-10-16 12:13:12,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421852738] [2020-10-16 12:13:12,911 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 12:13:12,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:13:12,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 12:13:12,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2020-10-16 12:13:12,912 INFO L87 Difference]: Start difference. First operand 2298 states and 8830 transitions. Second operand 20 states. [2020-10-16 12:13:14,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:13:14,524 INFO L93 Difference]: Finished difference Result 5870 states and 19152 transitions. [2020-10-16 12:13:14,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-16 12:13:14,524 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 19 [2020-10-16 12:13:14,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:13:14,541 INFO L225 Difference]: With dead ends: 5870 [2020-10-16 12:13:14,541 INFO L226 Difference]: Without dead ends: 5859 [2020-10-16 12:13:14,542 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 607 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=521, Invalid=2029, Unknown=0, NotChecked=0, Total=2550 [2020-10-16 12:13:14,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5859 states. [2020-10-16 12:13:14,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5859 to 2302. [2020-10-16 12:13:14,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2302 states. [2020-10-16 12:13:14,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2302 states to 2302 states and 8807 transitions. [2020-10-16 12:13:14,657 INFO L78 Accepts]: Start accepts. Automaton has 2302 states and 8807 transitions. Word has length 19 [2020-10-16 12:13:14,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:13:14,657 INFO L481 AbstractCegarLoop]: Abstraction has 2302 states and 8807 transitions. [2020-10-16 12:13:14,657 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 12:13:14,657 INFO L276 IsEmpty]: Start isEmpty. Operand 2302 states and 8807 transitions. [2020-10-16 12:13:14,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 12:13:14,659 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:13:14,659 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:13:14,873 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:13:14,874 INFO L429 AbstractCegarLoop]: === Iteration 8 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 12:13:14,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:13:14,874 INFO L82 PathProgramCache]: Analyzing trace with hash -565762555, now seen corresponding path program 1 times [2020-10-16 12:13:14,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:13:14,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790152788] [2020-10-16 12:13:14,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:13:14,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:13:14,969 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:13:14,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790152788] [2020-10-16 12:13:14,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814233786] [2020-10-16 12:13:14,969 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:13:15,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:13:15,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 12:13:15,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:13:15,178 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:13:15,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:13:15,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2020-10-16 12:13:15,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148875993] [2020-10-16 12:13:15,179 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 12:13:15,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:13:15,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 12:13:15,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2020-10-16 12:13:15,180 INFO L87 Difference]: Start difference. First operand 2302 states and 8807 transitions. Second operand 20 states. [2020-10-16 12:13:16,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:13:16,112 INFO L93 Difference]: Finished difference Result 6355 states and 21440 transitions. [2020-10-16 12:13:16,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 12:13:16,113 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 19 [2020-10-16 12:13:16,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:13:16,131 INFO L225 Difference]: With dead ends: 6355 [2020-10-16 12:13:16,131 INFO L226 Difference]: Without dead ends: 6342 [2020-10-16 12:13:16,132 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=354, Invalid=1206, Unknown=0, NotChecked=0, Total=1560 [2020-10-16 12:13:16,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6342 states. [2020-10-16 12:13:16,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6342 to 2434. [2020-10-16 12:13:16,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2434 states. [2020-10-16 12:13:16,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2434 states to 2434 states and 9410 transitions. [2020-10-16 12:13:16,298 INFO L78 Accepts]: Start accepts. Automaton has 2434 states and 9410 transitions. Word has length 19 [2020-10-16 12:13:16,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:13:16,298 INFO L481 AbstractCegarLoop]: Abstraction has 2434 states and 9410 transitions. [2020-10-16 12:13:16,298 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 12:13:16,298 INFO L276 IsEmpty]: Start isEmpty. Operand 2434 states and 9410 transitions. [2020-10-16 12:13:16,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 12:13:16,300 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:13:16,300 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:13:16,514 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-10-16 12:13:16,515 INFO L429 AbstractCegarLoop]: === Iteration 9 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 12:13:16,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:13:16,515 INFO L82 PathProgramCache]: Analyzing trace with hash -232926117, now seen corresponding path program 2 times [2020-10-16 12:13:16,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:13:16,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196749506] [2020-10-16 12:13:16,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:13:16,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:13:16,600 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:13:16,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196749506] [2020-10-16 12:13:16,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302280456] [2020-10-16 12:13:16,601 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:13:16,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 12:13:16,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:13:16,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 12:13:16,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:13:16,780 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-16 12:13:16,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:13:16,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 17 [2020-10-16 12:13:16,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121232651] [2020-10-16 12:13:16,781 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 12:13:16,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:13:16,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 12:13:16,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-10-16 12:13:16,782 INFO L87 Difference]: Start difference. First operand 2434 states and 9410 transitions. Second operand 19 states. [2020-10-16 12:13:17,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:13:17,625 INFO L93 Difference]: Finished difference Result 6296 states and 21798 transitions. [2020-10-16 12:13:17,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 12:13:17,626 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 19 [2020-10-16 12:13:17,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:13:17,642 INFO L225 Difference]: With dead ends: 6296 [2020-10-16 12:13:17,642 INFO L226 Difference]: Without dead ends: 6279 [2020-10-16 12:13:17,643 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=311, Invalid=949, Unknown=0, NotChecked=0, Total=1260 [2020-10-16 12:13:17,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6279 states. [2020-10-16 12:13:17,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6279 to 2330. [2020-10-16 12:13:17,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2330 states. [2020-10-16 12:13:17,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2330 states to 2330 states and 9020 transitions. [2020-10-16 12:13:17,733 INFO L78 Accepts]: Start accepts. Automaton has 2330 states and 9020 transitions. Word has length 19 [2020-10-16 12:13:17,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:13:17,734 INFO L481 AbstractCegarLoop]: Abstraction has 2330 states and 9020 transitions. [2020-10-16 12:13:17,734 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 12:13:17,734 INFO L276 IsEmpty]: Start isEmpty. Operand 2330 states and 9020 transitions. [2020-10-16 12:13:17,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 12:13:17,735 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:13:17,736 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:13:17,950 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:13:17,951 INFO L429 AbstractCegarLoop]: === Iteration 10 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 12:13:17,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:13:17,951 INFO L82 PathProgramCache]: Analyzing trace with hash -232915515, now seen corresponding path program 2 times [2020-10-16 12:13:17,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:13:17,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349547815] [2020-10-16 12:13:17,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:13:17,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:13:18,056 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:13:18,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349547815] [2020-10-16 12:13:18,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361379904] [2020-10-16 12:13:18,057 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:13:18,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 12:13:18,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:13:18,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 12:13:18,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:13:18,238 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-16 12:13:18,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:13:18,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 17 [2020-10-16 12:13:18,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218922673] [2020-10-16 12:13:18,240 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 12:13:18,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:13:18,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 12:13:18,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-10-16 12:13:18,240 INFO L87 Difference]: Start difference. First operand 2330 states and 9020 transitions. Second operand 19 states. [2020-10-16 12:13:19,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:13:19,129 INFO L93 Difference]: Finished difference Result 4998 states and 16790 transitions. [2020-10-16 12:13:19,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 12:13:19,130 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 19 [2020-10-16 12:13:19,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:13:19,139 INFO L225 Difference]: With dead ends: 4998 [2020-10-16 12:13:19,139 INFO L226 Difference]: Without dead ends: 4985 [2020-10-16 12:13:19,140 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=311, Invalid=949, Unknown=0, NotChecked=0, Total=1260 [2020-10-16 12:13:19,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4985 states. [2020-10-16 12:13:19,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4985 to 2353. [2020-10-16 12:13:19,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2353 states. [2020-10-16 12:13:19,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2353 states to 2353 states and 9106 transitions. [2020-10-16 12:13:19,226 INFO L78 Accepts]: Start accepts. Automaton has 2353 states and 9106 transitions. Word has length 19 [2020-10-16 12:13:19,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:13:19,227 INFO L481 AbstractCegarLoop]: Abstraction has 2353 states and 9106 transitions. [2020-10-16 12:13:19,227 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 12:13:19,227 INFO L276 IsEmpty]: Start isEmpty. Operand 2353 states and 9106 transitions. [2020-10-16 12:13:19,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 12:13:19,229 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:13:19,229 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:13:19,442 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-10-16 12:13:19,443 INFO L429 AbstractCegarLoop]: === Iteration 11 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 12:13:19,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:13:19,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1402635183, now seen corresponding path program 3 times [2020-10-16 12:13:19,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:13:19,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731371511] [2020-10-16 12:13:19,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:13:19,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:13:19,520 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:13:19,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731371511] [2020-10-16 12:13:19,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247552564] [2020-10-16 12:13:19,521 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:13:19,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 12:13:19,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:13:19,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 12:13:19,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:13:19,717 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:13:19,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:13:19,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2020-10-16 12:13:19,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053538367] [2020-10-16 12:13:19,718 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 12:13:19,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:13:19,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 12:13:19,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2020-10-16 12:13:19,719 INFO L87 Difference]: Start difference. First operand 2353 states and 9106 transitions. Second operand 20 states. [2020-10-16 12:13:20,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:13:20,758 INFO L93 Difference]: Finished difference Result 5765 states and 19150 transitions. [2020-10-16 12:13:20,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-16 12:13:20,758 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 19 [2020-10-16 12:13:20,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:13:20,768 INFO L225 Difference]: With dead ends: 5765 [2020-10-16 12:13:20,768 INFO L226 Difference]: Without dead ends: 5752 [2020-10-16 12:13:20,769 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=423, Invalid=1469, Unknown=0, NotChecked=0, Total=1892 [2020-10-16 12:13:20,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5752 states. [2020-10-16 12:13:20,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5752 to 2296. [2020-10-16 12:13:20,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2296 states. [2020-10-16 12:13:20,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2296 states to 2296 states and 8805 transitions. [2020-10-16 12:13:20,910 INFO L78 Accepts]: Start accepts. Automaton has 2296 states and 8805 transitions. Word has length 19 [2020-10-16 12:13:20,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:13:20,911 INFO L481 AbstractCegarLoop]: Abstraction has 2296 states and 8805 transitions. [2020-10-16 12:13:20,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 12:13:20,911 INFO L276 IsEmpty]: Start isEmpty. Operand 2296 states and 8805 transitions. [2020-10-16 12:13:20,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 12:13:20,913 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:13:20,913 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:13:21,128 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-10-16 12:13:21,129 INFO L429 AbstractCegarLoop]: === Iteration 12 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 12:13:21,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:13:21,129 INFO L82 PathProgramCache]: Analyzing trace with hash 316303169, now seen corresponding path program 4 times [2020-10-16 12:13:21,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:13:21,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38903949] [2020-10-16 12:13:21,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:13:21,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:13:21,229 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:13:21,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38903949] [2020-10-16 12:13:21,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036260686] [2020-10-16 12:13:21,230 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:13:21,294 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 12:13:21,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:13:21,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 12:13:21,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:13:21,433 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:13:21,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:13:21,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2020-10-16 12:13:21,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199341575] [2020-10-16 12:13:21,435 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 12:13:21,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:13:21,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 12:13:21,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2020-10-16 12:13:21,435 INFO L87 Difference]: Start difference. First operand 2296 states and 8805 transitions. Second operand 20 states. [2020-10-16 12:13:22,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:13:22,717 INFO L93 Difference]: Finished difference Result 6013 states and 19535 transitions. [2020-10-16 12:13:22,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-16 12:13:22,718 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 19 [2020-10-16 12:13:22,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:13:22,731 INFO L225 Difference]: With dead ends: 6013 [2020-10-16 12:13:22,731 INFO L226 Difference]: Without dead ends: 5999 [2020-10-16 12:13:22,732 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=484, Invalid=1678, Unknown=0, NotChecked=0, Total=2162 [2020-10-16 12:13:22,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5999 states. [2020-10-16 12:13:22,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5999 to 2137. [2020-10-16 12:13:22,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2137 states. [2020-10-16 12:13:22,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2137 states to 2137 states and 8171 transitions. [2020-10-16 12:13:22,825 INFO L78 Accepts]: Start accepts. Automaton has 2137 states and 8171 transitions. Word has length 19 [2020-10-16 12:13:22,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:13:22,825 INFO L481 AbstractCegarLoop]: Abstraction has 2137 states and 8171 transitions. [2020-10-16 12:13:22,825 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 12:13:22,826 INFO L276 IsEmpty]: Start isEmpty. Operand 2137 states and 8171 transitions. [2020-10-16 12:13:22,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 12:13:22,827 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:13:22,828 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:13:23,040 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-10-16 12:13:23,040 INFO L429 AbstractCegarLoop]: === Iteration 13 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 12:13:23,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:13:23,041 INFO L82 PathProgramCache]: Analyzing trace with hash -384450883, now seen corresponding path program 1 times [2020-10-16 12:13:23,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:13:23,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538278481] [2020-10-16 12:13:23,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:13:23,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:13:23,122 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-16 12:13:23,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538278481] [2020-10-16 12:13:23,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244755975] [2020-10-16 12:13:23,123 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:13:23,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:13:23,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 12:13:23,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:13:23,401 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:13:23,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:13:23,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 21 [2020-10-16 12:13:23,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68559865] [2020-10-16 12:13:23,402 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 12:13:23,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:13:23,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 12:13:23,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2020-10-16 12:13:23,404 INFO L87 Difference]: Start difference. First operand 2137 states and 8171 transitions. Second operand 23 states. [2020-10-16 12:13:30,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:13:30,291 INFO L93 Difference]: Finished difference Result 16699 states and 48935 transitions. [2020-10-16 12:13:30,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2020-10-16 12:13:30,292 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 21 [2020-10-16 12:13:30,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:13:30,320 INFO L225 Difference]: With dead ends: 16699 [2020-10-16 12:13:30,320 INFO L226 Difference]: Without dead ends: 16669 [2020-10-16 12:13:30,326 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11551 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=4252, Invalid=24818, Unknown=0, NotChecked=0, Total=29070 [2020-10-16 12:13:30,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16669 states. [2020-10-16 12:13:30,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16669 to 2250. [2020-10-16 12:13:30,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2250 states. [2020-10-16 12:13:30,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2250 states to 2250 states and 8709 transitions. [2020-10-16 12:13:30,507 INFO L78 Accepts]: Start accepts. Automaton has 2250 states and 8709 transitions. Word has length 21 [2020-10-16 12:13:30,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:13:30,507 INFO L481 AbstractCegarLoop]: Abstraction has 2250 states and 8709 transitions. [2020-10-16 12:13:30,507 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 12:13:30,507 INFO L276 IsEmpty]: Start isEmpty. Operand 2250 states and 8709 transitions. [2020-10-16 12:13:30,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 12:13:30,509 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:13:30,509 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:13:30,717 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-10-16 12:13:30,718 INFO L429 AbstractCegarLoop]: === Iteration 14 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 12:13:30,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:13:30,718 INFO L82 PathProgramCache]: Analyzing trace with hash -51603843, now seen corresponding path program 2 times [2020-10-16 12:13:30,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:13:30,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829188535] [2020-10-16 12:13:30,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:13:30,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:13:30,826 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:13:30,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829188535] [2020-10-16 12:13:30,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732946287] [2020-10-16 12:13:30,827 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:13:30,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 12:13:30,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:13:30,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 12:13:30,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:13:31,127 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:13:31,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:13:31,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2020-10-16 12:13:31,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526070191] [2020-10-16 12:13:31,129 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 12:13:31,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:13:31,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 12:13:31,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2020-10-16 12:13:31,130 INFO L87 Difference]: Start difference. First operand 2250 states and 8709 transitions. Second operand 24 states. [2020-10-16 12:13:35,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:13:35,982 INFO L93 Difference]: Finished difference Result 12670 states and 37996 transitions. [2020-10-16 12:13:35,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2020-10-16 12:13:35,982 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 21 [2020-10-16 12:13:35,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:13:36,005 INFO L225 Difference]: With dead ends: 12670 [2020-10-16 12:13:36,005 INFO L226 Difference]: Without dead ends: 12624 [2020-10-16 12:13:36,008 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6235 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2803, Invalid=13967, Unknown=0, NotChecked=0, Total=16770 [2020-10-16 12:13:36,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12624 states. [2020-10-16 12:13:36,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12624 to 2290. [2020-10-16 12:13:36,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2290 states. [2020-10-16 12:13:36,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2290 states to 2290 states and 8926 transitions. [2020-10-16 12:13:36,148 INFO L78 Accepts]: Start accepts. Automaton has 2290 states and 8926 transitions. Word has length 21 [2020-10-16 12:13:36,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:13:36,148 INFO L481 AbstractCegarLoop]: Abstraction has 2290 states and 8926 transitions. [2020-10-16 12:13:36,148 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 12:13:36,148 INFO L276 IsEmpty]: Start isEmpty. Operand 2290 states and 8926 transitions. [2020-10-16 12:13:36,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 12:13:36,150 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:13:36,150 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:13:36,363 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:13:36,364 INFO L429 AbstractCegarLoop]: === Iteration 15 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 12:13:36,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:13:36,364 INFO L82 PathProgramCache]: Analyzing trace with hash -1221323511, now seen corresponding path program 3 times [2020-10-16 12:13:36,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:13:36,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033230103] [2020-10-16 12:13:36,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:13:36,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:13:36,464 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-16 12:13:36,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033230103] [2020-10-16 12:13:36,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721983507] [2020-10-16 12:13:36,465 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:13:36,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 12:13:36,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:13:36,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 12:13:36,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:13:36,820 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:13:36,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:13:36,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 21 [2020-10-16 12:13:36,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213645058] [2020-10-16 12:13:36,821 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 12:13:36,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:13:36,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 12:13:36,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2020-10-16 12:13:36,822 INFO L87 Difference]: Start difference. First operand 2290 states and 8926 transitions. Second operand 23 states. [2020-10-16 12:13:41,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:13:41,804 INFO L93 Difference]: Finished difference Result 9883 states and 28929 transitions. [2020-10-16 12:13:41,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2020-10-16 12:13:41,804 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 21 [2020-10-16 12:13:41,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:13:41,822 INFO L225 Difference]: With dead ends: 9883 [2020-10-16 12:13:41,822 INFO L226 Difference]: Without dead ends: 9872 [2020-10-16 12:13:41,823 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6656 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=2742, Invalid=15080, Unknown=0, NotChecked=0, Total=17822 [2020-10-16 12:13:41,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9872 states. [2020-10-16 12:13:41,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9872 to 2209. [2020-10-16 12:13:41,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2209 states. [2020-10-16 12:13:41,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2209 states to 2209 states and 8538 transitions. [2020-10-16 12:13:41,916 INFO L78 Accepts]: Start accepts. Automaton has 2209 states and 8538 transitions. Word has length 21 [2020-10-16 12:13:41,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:13:41,916 INFO L481 AbstractCegarLoop]: Abstraction has 2209 states and 8538 transitions. [2020-10-16 12:13:41,916 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 12:13:41,916 INFO L276 IsEmpty]: Start isEmpty. Operand 2209 states and 8538 transitions. [2020-10-16 12:13:41,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 12:13:41,918 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:13:41,918 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:13:42,119 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:13:42,120 INFO L429 AbstractCegarLoop]: === Iteration 16 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 12:13:42,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:13:42,120 INFO L82 PathProgramCache]: Analyzing trace with hash 497614841, now seen corresponding path program 4 times [2020-10-16 12:13:42,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:13:42,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314731364] [2020-10-16 12:13:42,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:13:42,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:13:42,223 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-16 12:13:42,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314731364] [2020-10-16 12:13:42,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067809284] [2020-10-16 12:13:42,224 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:13:42,296 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 12:13:42,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:13:42,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 12:13:42,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:13:42,497 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:13:42,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:13:42,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 21 [2020-10-16 12:13:42,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166665102] [2020-10-16 12:13:42,498 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 12:13:42,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:13:42,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 12:13:42,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2020-10-16 12:13:42,499 INFO L87 Difference]: Start difference. First operand 2209 states and 8538 transitions. Second operand 23 states. [2020-10-16 12:13:47,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:13:47,716 INFO L93 Difference]: Finished difference Result 10177 states and 29709 transitions. [2020-10-16 12:13:47,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2020-10-16 12:13:47,716 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 21 [2020-10-16 12:13:47,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:13:47,734 INFO L225 Difference]: With dead ends: 10177 [2020-10-16 12:13:47,734 INFO L226 Difference]: Without dead ends: 10168 [2020-10-16 12:13:47,736 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6594 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2710, Invalid=14582, Unknown=0, NotChecked=0, Total=17292 [2020-10-16 12:13:47,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10168 states. [2020-10-16 12:13:47,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10168 to 2191. [2020-10-16 12:13:47,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2191 states. [2020-10-16 12:13:47,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2191 states to 2191 states and 8469 transitions. [2020-10-16 12:13:47,831 INFO L78 Accepts]: Start accepts. Automaton has 2191 states and 8469 transitions. Word has length 21 [2020-10-16 12:13:47,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:13:47,831 INFO L481 AbstractCegarLoop]: Abstraction has 2191 states and 8469 transitions. [2020-10-16 12:13:47,832 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 12:13:47,832 INFO L276 IsEmpty]: Start isEmpty. Operand 2191 states and 8469 transitions. [2020-10-16 12:13:47,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 12:13:47,833 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:13:47,833 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:13:48,033 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:13:48,034 INFO L429 AbstractCegarLoop]: === Iteration 17 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 12:13:48,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:13:48,034 INFO L82 PathProgramCache]: Analyzing trace with hash 228952445, now seen corresponding path program 5 times [2020-10-16 12:13:48,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:13:48,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673656803] [2020-10-16 12:13:48,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:13:48,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:13:48,137 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:13:48,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673656803] [2020-10-16 12:13:48,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113614228] [2020-10-16 12:13:48,138 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:13:48,198 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 12:13:48,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:13:48,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 12:13:48,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:13:48,470 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:13:48,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:13:48,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2020-10-16 12:13:48,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711272567] [2020-10-16 12:13:48,472 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 12:13:48,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:13:48,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 12:13:48,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2020-10-16 12:13:48,473 INFO L87 Difference]: Start difference. First operand 2191 states and 8469 transitions. Second operand 24 states. [2020-10-16 12:13:54,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:13:54,361 INFO L93 Difference]: Finished difference Result 20292 states and 62482 transitions. [2020-10-16 12:13:54,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2020-10-16 12:13:54,361 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 21 [2020-10-16 12:13:54,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:13:54,399 INFO L225 Difference]: With dead ends: 20292 [2020-10-16 12:13:54,399 INFO L226 Difference]: Without dead ends: 20283 [2020-10-16 12:13:54,401 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8380 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=3579, Invalid=18473, Unknown=0, NotChecked=0, Total=22052 [2020-10-16 12:13:54,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20283 states. [2020-10-16 12:13:54,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20283 to 2281. [2020-10-16 12:13:54,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2281 states. [2020-10-16 12:13:54,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2281 states to 2281 states and 8895 transitions. [2020-10-16 12:13:54,565 INFO L78 Accepts]: Start accepts. Automaton has 2281 states and 8895 transitions. Word has length 21 [2020-10-16 12:13:54,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:13:54,566 INFO L481 AbstractCegarLoop]: Abstraction has 2281 states and 8895 transitions. [2020-10-16 12:13:54,566 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 12:13:54,566 INFO L276 IsEmpty]: Start isEmpty. Operand 2281 states and 8895 transitions. [2020-10-16 12:13:54,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 12:13:54,567 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:13:54,567 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:13:54,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-10-16 12:13:54,768 INFO L429 AbstractCegarLoop]: === Iteration 18 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 12:13:54,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:13:54,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1763023933, now seen corresponding path program 6 times [2020-10-16 12:13:54,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:13:54,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762867701] [2020-10-16 12:13:54,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:13:54,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:13:54,889 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:13:54,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762867701] [2020-10-16 12:13:54,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373899194] [2020-10-16 12:13:54,890 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:13:54,972 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 12:13:54,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:13:54,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 12:13:54,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:13:55,200 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:13:55,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:13:55,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2020-10-16 12:13:55,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892532284] [2020-10-16 12:13:55,201 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 12:13:55,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:13:55,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 12:13:55,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2020-10-16 12:13:55,202 INFO L87 Difference]: Start difference. First operand 2281 states and 8895 transitions. Second operand 24 states. [2020-10-16 12:13:59,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:13:59,048 INFO L93 Difference]: Finished difference Result 13322 states and 41408 transitions. [2020-10-16 12:13:59,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2020-10-16 12:13:59,048 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 21 [2020-10-16 12:13:59,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:13:59,075 INFO L225 Difference]: With dead ends: 13322 [2020-10-16 12:13:59,075 INFO L226 Difference]: Without dead ends: 13299 [2020-10-16 12:13:59,076 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3070 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1681, Invalid=7439, Unknown=0, NotChecked=0, Total=9120 [2020-10-16 12:13:59,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13299 states. [2020-10-16 12:13:59,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13299 to 2364. [2020-10-16 12:13:59,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2364 states. [2020-10-16 12:13:59,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2364 states to 2364 states and 9320 transitions. [2020-10-16 12:13:59,203 INFO L78 Accepts]: Start accepts. Automaton has 2364 states and 9320 transitions. Word has length 21 [2020-10-16 12:13:59,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:13:59,203 INFO L481 AbstractCegarLoop]: Abstraction has 2364 states and 9320 transitions. [2020-10-16 12:13:59,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 12:13:59,204 INFO L276 IsEmpty]: Start isEmpty. Operand 2364 states and 9320 transitions. [2020-10-16 12:13:59,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 12:13:59,206 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:13:59,206 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:13:59,406 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-10-16 12:13:59,407 INFO L429 AbstractCegarLoop]: === Iteration 19 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 12:13:59,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:13:59,407 INFO L82 PathProgramCache]: Analyzing trace with hash -503695747, now seen corresponding path program 7 times [2020-10-16 12:13:59,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:13:59,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530518038] [2020-10-16 12:13:59,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:13:59,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:13:59,521 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:13:59,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530518038] [2020-10-16 12:13:59,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079784897] [2020-10-16 12:13:59,522 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:13:59,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:13:59,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 12:13:59,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:13:59,781 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:13:59,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:13:59,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2020-10-16 12:13:59,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686350118] [2020-10-16 12:13:59,782 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 12:13:59,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:13:59,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 12:13:59,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2020-10-16 12:13:59,783 INFO L87 Difference]: Start difference. First operand 2364 states and 9320 transitions. Second operand 24 states. [2020-10-16 12:14:04,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:14:04,007 INFO L93 Difference]: Finished difference Result 17817 states and 55054 transitions. [2020-10-16 12:14:04,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2020-10-16 12:14:04,007 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 21 [2020-10-16 12:14:04,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:14:04,042 INFO L225 Difference]: With dead ends: 17817 [2020-10-16 12:14:04,043 INFO L226 Difference]: Without dead ends: 17803 [2020-10-16 12:14:04,043 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4137 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2116, Invalid=9656, Unknown=0, NotChecked=0, Total=11772 [2020-10-16 12:14:04,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17803 states. [2020-10-16 12:14:04,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17803 to 2349. [2020-10-16 12:14:04,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2349 states. [2020-10-16 12:14:04,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2349 states to 2349 states and 9316 transitions. [2020-10-16 12:14:04,203 INFO L78 Accepts]: Start accepts. Automaton has 2349 states and 9316 transitions. Word has length 21 [2020-10-16 12:14:04,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:14:04,204 INFO L481 AbstractCegarLoop]: Abstraction has 2349 states and 9316 transitions. [2020-10-16 12:14:04,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 12:14:04,204 INFO L276 IsEmpty]: Start isEmpty. Operand 2349 states and 9316 transitions. [2020-10-16 12:14:04,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 12:14:04,205 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:14:04,205 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:14:04,410 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-10-16 12:14:04,411 INFO L429 AbstractCegarLoop]: === Iteration 20 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 12:14:04,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:14:04,411 INFO L82 PathProgramCache]: Analyzing trace with hash -493517827, now seen corresponding path program 8 times [2020-10-16 12:14:04,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:14:04,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987459394] [2020-10-16 12:14:04,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:14:04,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:14:04,543 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:14:04,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987459394] [2020-10-16 12:14:04,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785996844] [2020-10-16 12:14:04,544 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:14:04,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 12:14:04,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:14:04,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 12:14:04,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:14:04,864 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:14:04,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:14:04,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2020-10-16 12:14:04,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557863713] [2020-10-16 12:14:04,865 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 12:14:04,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:14:04,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 12:14:04,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2020-10-16 12:14:04,866 INFO L87 Difference]: Start difference. First operand 2349 states and 9316 transitions. Second operand 24 states. [2020-10-16 12:14:09,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:14:09,088 INFO L93 Difference]: Finished difference Result 15364 states and 46571 transitions. [2020-10-16 12:14:09,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2020-10-16 12:14:09,089 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 21 [2020-10-16 12:14:09,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:14:09,120 INFO L225 Difference]: With dead ends: 15364 [2020-10-16 12:14:09,121 INFO L226 Difference]: Without dead ends: 15352 [2020-10-16 12:14:09,121 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4297 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2157, Invalid=10053, Unknown=0, NotChecked=0, Total=12210 [2020-10-16 12:14:09,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15352 states. [2020-10-16 12:14:09,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15352 to 2316. [2020-10-16 12:14:09,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2316 states. [2020-10-16 12:14:09,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2316 states to 2316 states and 9184 transitions. [2020-10-16 12:14:09,255 INFO L78 Accepts]: Start accepts. Automaton has 2316 states and 9184 transitions. Word has length 21 [2020-10-16 12:14:09,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:14:09,256 INFO L481 AbstractCegarLoop]: Abstraction has 2316 states and 9184 transitions. [2020-10-16 12:14:09,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 12:14:09,256 INFO L276 IsEmpty]: Start isEmpty. Operand 2316 states and 9184 transitions. [2020-10-16 12:14:09,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 12:14:09,258 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:14:09,258 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:14:09,471 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-10-16 12:14:09,472 INFO L429 AbstractCegarLoop]: === Iteration 21 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 12:14:09,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:14:09,472 INFO L82 PathProgramCache]: Analyzing trace with hash -917262728, now seen corresponding path program 1 times [2020-10-16 12:14:09,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:14:09,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096583994] [2020-10-16 12:14:09,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:14:09,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:14:09,507 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-16 12:14:09,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096583994] [2020-10-16 12:14:09,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 12:14:09,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 12:14:09,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756959392] [2020-10-16 12:14:09,508 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-16 12:14:09,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:14:09,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-16 12:14:09,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-16 12:14:09,509 INFO L87 Difference]: Start difference. First operand 2316 states and 9184 transitions. Second operand 5 states. [2020-10-16 12:14:09,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:14:09,636 INFO L93 Difference]: Finished difference Result 3867 states and 13980 transitions. [2020-10-16 12:14:09,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 12:14:09,637 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-10-16 12:14:09,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:14:09,644 INFO L225 Difference]: With dead ends: 3867 [2020-10-16 12:14:09,644 INFO L226 Difference]: Without dead ends: 3851 [2020-10-16 12:14:09,644 INFO L677 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 [2020-10-16 12:14:09,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3851 states. [2020-10-16 12:14:09,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3851 to 2519. [2020-10-16 12:14:09,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2519 states. [2020-10-16 12:14:09,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2519 states to 2519 states and 9807 transitions. [2020-10-16 12:14:09,701 INFO L78 Accepts]: Start accepts. Automaton has 2519 states and 9807 transitions. Word has length 21 [2020-10-16 12:14:09,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:14:09,701 INFO L481 AbstractCegarLoop]: Abstraction has 2519 states and 9807 transitions. [2020-10-16 12:14:09,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-16 12:14:09,701 INFO L276 IsEmpty]: Start isEmpty. Operand 2519 states and 9807 transitions. [2020-10-16 12:14:09,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 12:14:09,702 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:14:09,703 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:14:09,703 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-16 12:14:09,703 INFO L429 AbstractCegarLoop]: === Iteration 22 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 12:14:09,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:14:09,703 INFO L82 PathProgramCache]: Analyzing trace with hash -846758711, now seen corresponding path program 9 times [2020-10-16 12:14:09,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:14:09,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871316170] [2020-10-16 12:14:09,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:14:09,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:14:09,836 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:14:09,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871316170] [2020-10-16 12:14:09,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873392815] [2020-10-16 12:14:09,837 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:14:09,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 12:14:09,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:14:09,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 12:14:09,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:14:10,236 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:14:10,237 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:14:10,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2020-10-16 12:14:10,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811685279] [2020-10-16 12:14:10,238 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 12:14:10,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:14:10,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 12:14:10,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2020-10-16 12:14:10,239 INFO L87 Difference]: Start difference. First operand 2519 states and 9807 transitions. Second operand 24 states. [2020-10-16 12:14:17,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:14:17,490 INFO L93 Difference]: Finished difference Result 20264 states and 62039 transitions. [2020-10-16 12:14:17,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2020-10-16 12:14:17,490 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 21 [2020-10-16 12:14:17,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:14:17,534 INFO L225 Difference]: With dead ends: 20264 [2020-10-16 12:14:17,534 INFO L226 Difference]: Without dead ends: 20244 [2020-10-16 12:14:17,536 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10493 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=4446, Invalid=22944, Unknown=0, NotChecked=0, Total=27390 [2020-10-16 12:14:17,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20244 states. [2020-10-16 12:14:17,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20244 to 2554. [2020-10-16 12:14:17,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2554 states. [2020-10-16 12:14:17,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2554 states to 2554 states and 9958 transitions. [2020-10-16 12:14:17,723 INFO L78 Accepts]: Start accepts. Automaton has 2554 states and 9958 transitions. Word has length 21 [2020-10-16 12:14:17,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:14:17,723 INFO L481 AbstractCegarLoop]: Abstraction has 2554 states and 9958 transitions. [2020-10-16 12:14:17,723 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 12:14:17,723 INFO L276 IsEmpty]: Start isEmpty. Operand 2554 states and 9958 transitions. [2020-10-16 12:14:17,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 12:14:17,725 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:14:17,725 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:14:17,941 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-10-16 12:14:17,942 INFO L429 AbstractCegarLoop]: === Iteration 23 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 12:14:17,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:14:17,942 INFO L82 PathProgramCache]: Analyzing trace with hash 687312777, now seen corresponding path program 10 times [2020-10-16 12:14:17,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:14:17,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507320370] [2020-10-16 12:14:17,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:14:17,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:14:18,077 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:14:18,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507320370] [2020-10-16 12:14:18,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658980985] [2020-10-16 12:14:18,078 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:14:18,143 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 12:14:18,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:14:18,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 12:14:18,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:14:18,365 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:14:18,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:14:18,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2020-10-16 12:14:18,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232262495] [2020-10-16 12:14:18,367 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 12:14:18,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:14:18,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 12:14:18,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2020-10-16 12:14:18,368 INFO L87 Difference]: Start difference. First operand 2554 states and 9958 transitions. Second operand 24 states. [2020-10-16 12:14:22,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:14:22,357 INFO L93 Difference]: Finished difference Result 12545 states and 38647 transitions. [2020-10-16 12:14:22,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2020-10-16 12:14:22,357 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 21 [2020-10-16 12:14:22,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:14:22,381 INFO L225 Difference]: With dead ends: 12545 [2020-10-16 12:14:22,381 INFO L226 Difference]: Without dead ends: 12520 [2020-10-16 12:14:22,382 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3767 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2039, Invalid=9091, Unknown=0, NotChecked=0, Total=11130 [2020-10-16 12:14:22,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12520 states. [2020-10-16 12:14:22,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12520 to 2453. [2020-10-16 12:14:22,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2453 states. [2020-10-16 12:14:22,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2453 states to 2453 states and 9523 transitions. [2020-10-16 12:14:22,507 INFO L78 Accepts]: Start accepts. Automaton has 2453 states and 9523 transitions. Word has length 21 [2020-10-16 12:14:22,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:14:22,507 INFO L481 AbstractCegarLoop]: Abstraction has 2453 states and 9523 transitions. [2020-10-16 12:14:22,507 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 12:14:22,508 INFO L276 IsEmpty]: Start isEmpty. Operand 2453 states and 9523 transitions. [2020-10-16 12:14:22,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 12:14:22,509 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:14:22,509 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:14:22,709 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:14:22,710 INFO L429 AbstractCegarLoop]: === Iteration 24 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 12:14:22,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:14:22,710 INFO L82 PathProgramCache]: Analyzing trace with hash 130244667, now seen corresponding path program 11 times [2020-10-16 12:14:22,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:14:22,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802976711] [2020-10-16 12:14:22,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:14:22,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:14:22,802 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:14:22,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802976711] [2020-10-16 12:14:22,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156042324] [2020-10-16 12:14:22,803 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:14:22,868 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 12:14:22,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:14:22,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 12:14:22,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:14:23,094 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:14:23,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:14:23,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 21 [2020-10-16 12:14:23,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778314165] [2020-10-16 12:14:23,095 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 12:14:23,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:14:23,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 12:14:23,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2020-10-16 12:14:23,095 INFO L87 Difference]: Start difference. First operand 2453 states and 9523 transitions. Second operand 23 states. [2020-10-16 12:14:28,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:14:28,022 INFO L93 Difference]: Finished difference Result 10812 states and 32025 transitions. [2020-10-16 12:14:28,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2020-10-16 12:14:28,023 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 21 [2020-10-16 12:14:28,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:14:28,047 INFO L225 Difference]: With dead ends: 10812 [2020-10-16 12:14:28,047 INFO L226 Difference]: Without dead ends: 10805 [2020-10-16 12:14:28,049 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6590 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2834, Invalid=14722, Unknown=0, NotChecked=0, Total=17556 [2020-10-16 12:14:28,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10805 states. [2020-10-16 12:14:28,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10805 to 2384. [2020-10-16 12:14:28,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2384 states. [2020-10-16 12:14:28,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2384 states to 2384 states and 9208 transitions. [2020-10-16 12:14:28,189 INFO L78 Accepts]: Start accepts. Automaton has 2384 states and 9208 transitions. Word has length 21 [2020-10-16 12:14:28,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:14:28,190 INFO L481 AbstractCegarLoop]: Abstraction has 2384 states and 9208 transitions. [2020-10-16 12:14:28,190 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 12:14:28,190 INFO L276 IsEmpty]: Start isEmpty. Operand 2384 states and 9208 transitions. [2020-10-16 12:14:28,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 12:14:28,192 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:14:28,192 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:14:28,405 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-10-16 12:14:28,406 INFO L429 AbstractCegarLoop]: === Iteration 25 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 12:14:28,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:14:28,406 INFO L82 PathProgramCache]: Analyzing trace with hash 990308489, now seen corresponding path program 12 times [2020-10-16 12:14:28,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:14:28,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311313472] [2020-10-16 12:14:28,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:14:28,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:14:28,508 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:14:28,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311313472] [2020-10-16 12:14:28,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568964209] [2020-10-16 12:14:28,509 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:14:28,574 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 12:14:28,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:14:28,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 12:14:28,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:14:28,781 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:14:28,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:14:28,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 21 [2020-10-16 12:14:28,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849611758] [2020-10-16 12:14:28,783 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 12:14:28,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:14:28,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 12:14:28,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2020-10-16 12:14:28,783 INFO L87 Difference]: Start difference. First operand 2384 states and 9208 transitions. Second operand 23 states. [2020-10-16 12:14:34,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:14:34,153 INFO L93 Difference]: Finished difference Result 11481 states and 33893 transitions. [2020-10-16 12:14:34,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2020-10-16 12:14:34,155 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 21 [2020-10-16 12:14:34,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:14:34,180 INFO L225 Difference]: With dead ends: 11481 [2020-10-16 12:14:34,180 INFO L226 Difference]: Without dead ends: 11475 [2020-10-16 12:14:34,182 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6864 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2919, Invalid=14903, Unknown=0, NotChecked=0, Total=17822 [2020-10-16 12:14:34,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11475 states. [2020-10-16 12:14:34,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11475 to 2373. [2020-10-16 12:14:34,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2373 states. [2020-10-16 12:14:34,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2373 states to 2373 states and 9196 transitions. [2020-10-16 12:14:34,296 INFO L78 Accepts]: Start accepts. Automaton has 2373 states and 9196 transitions. Word has length 21 [2020-10-16 12:14:34,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:14:34,296 INFO L481 AbstractCegarLoop]: Abstraction has 2373 states and 9196 transitions. [2020-10-16 12:14:34,296 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 12:14:34,296 INFO L276 IsEmpty]: Start isEmpty. Operand 2373 states and 9196 transitions. [2020-10-16 12:14:34,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 12:14:34,297 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:14:34,298 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:14:34,498 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:14:34,498 INFO L429 AbstractCegarLoop]: === Iteration 26 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 12:14:34,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:14:34,499 INFO L82 PathProgramCache]: Analyzing trace with hash -975339911, now seen corresponding path program 13 times [2020-10-16 12:14:34,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:14:34,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125357781] [2020-10-16 12:14:34,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:14:34,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:14:34,616 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:14:34,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125357781] [2020-10-16 12:14:34,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350088902] [2020-10-16 12:14:34,617 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:14:34,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:14:34,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 12:14:34,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:14:34,913 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:14:34,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:14:34,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2020-10-16 12:14:34,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158724385] [2020-10-16 12:14:34,914 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 12:14:34,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:14:34,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 12:14:34,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2020-10-16 12:14:34,915 INFO L87 Difference]: Start difference. First operand 2373 states and 9196 transitions. Second operand 24 states. [2020-10-16 12:14:39,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:14:39,911 INFO L93 Difference]: Finished difference Result 12980 states and 39286 transitions. [2020-10-16 12:14:39,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2020-10-16 12:14:39,912 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 21 [2020-10-16 12:14:39,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:14:39,934 INFO L225 Difference]: With dead ends: 12980 [2020-10-16 12:14:39,934 INFO L226 Difference]: Without dead ends: 12966 [2020-10-16 12:14:39,936 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5839 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2692, Invalid=12808, Unknown=0, NotChecked=0, Total=15500 [2020-10-16 12:14:39,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12966 states. [2020-10-16 12:14:40,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12966 to 2234. [2020-10-16 12:14:40,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2234 states. [2020-10-16 12:14:40,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2234 states to 2234 states and 8695 transitions. [2020-10-16 12:14:40,050 INFO L78 Accepts]: Start accepts. Automaton has 2234 states and 8695 transitions. Word has length 21 [2020-10-16 12:14:40,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:14:40,051 INFO L481 AbstractCegarLoop]: Abstraction has 2234 states and 8695 transitions. [2020-10-16 12:14:40,051 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 12:14:40,051 INFO L276 IsEmpty]: Start isEmpty. Operand 2234 states and 8695 transitions. [2020-10-16 12:14:40,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 12:14:40,053 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:14:40,053 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:14:40,261 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-10-16 12:14:40,262 INFO L429 AbstractCegarLoop]: === Iteration 27 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 12:14:40,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:14:40,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1624171416, now seen corresponding path program 1 times [2020-10-16 12:14:40,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:14:40,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403898915] [2020-10-16 12:14:40,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:14:40,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 12:14:40,271 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 12:14:40,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 12:14:40,276 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 12:14:40,289 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-16 12:14:40,289 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-16 12:14:40,289 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-16 12:14:40,289 WARN L264 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-10-16 12:14:40,290 WARN L371 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2020-10-16 12:14:40,292 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2020-10-16 12:14:40,308 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread4of5ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,308 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread4of5ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,308 WARN L313 ript$VariableManager]: TermVariabe thr2Thread4of5ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,309 WARN L313 ript$VariableManager]: TermVariabe thr2Thread4of5ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,309 WARN L313 ript$VariableManager]: TermVariabe thr2Thread4of5ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,309 WARN L313 ript$VariableManager]: TermVariabe thr2Thread4of5ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,309 WARN L313 ript$VariableManager]: TermVariabe thr2Thread4of5ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,309 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread4of5ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,309 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread4of5ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,309 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread5of5ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,310 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread5of5ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,310 WARN L313 ript$VariableManager]: TermVariabe thr2Thread5of5ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,310 WARN L313 ript$VariableManager]: TermVariabe thr2Thread5of5ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,310 WARN L313 ript$VariableManager]: TermVariabe thr2Thread5of5ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,310 WARN L313 ript$VariableManager]: TermVariabe thr2Thread5of5ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,310 WARN L313 ript$VariableManager]: TermVariabe thr2Thread5of5ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,310 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread5of5ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,310 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread5of5ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,311 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread3of5ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,311 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread3of5ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,311 WARN L313 ript$VariableManager]: TermVariabe thr2Thread3of5ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,311 WARN L313 ript$VariableManager]: TermVariabe thr2Thread3of5ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,311 WARN L313 ript$VariableManager]: TermVariabe thr2Thread3of5ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,311 WARN L313 ript$VariableManager]: TermVariabe thr2Thread3of5ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,311 WARN L313 ript$VariableManager]: TermVariabe thr2Thread3of5ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,311 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread3of5ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,312 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread3of5ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,312 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of5ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,312 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of5ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,312 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of5ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,312 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of5ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,312 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of5ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,312 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of5ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,312 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of5ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,313 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of5ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,313 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of5ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,313 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread2of5ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,313 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread2of5ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,313 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of5ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,313 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of5ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,313 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of5ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,313 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of5ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,314 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of5ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,314 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread2of5ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,314 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread2of5ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,314 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,314 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,314 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,314 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,315 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of5ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,315 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of5ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,315 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of5ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,315 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of5ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,315 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of5ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,315 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of5ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,315 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,315 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,316 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,316 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,316 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,316 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,316 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of5ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,316 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of5ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,316 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of5ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,316 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of5ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,317 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of5ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,317 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of5ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,317 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,317 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,318 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread3of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,318 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread3of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,318 WARN L313 ript$VariableManager]: TermVariabe thr1Thread3of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,318 WARN L313 ript$VariableManager]: TermVariabe thr1Thread3of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,318 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread3of5ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,318 WARN L313 ript$VariableManager]: TermVariabe thr1Thread3of5ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,319 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread3of5ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,319 WARN L313 ript$VariableManager]: TermVariabe thr1Thread3of5ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,319 WARN L313 ript$VariableManager]: TermVariabe thr1Thread3of5ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,319 WARN L313 ript$VariableManager]: TermVariabe thr1Thread3of5ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,319 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread3of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,319 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread3of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,320 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread4of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,320 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread4of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,320 WARN L313 ript$VariableManager]: TermVariabe thr1Thread4of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,320 WARN L313 ript$VariableManager]: TermVariabe thr1Thread4of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,320 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread4of5ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,320 WARN L313 ript$VariableManager]: TermVariabe thr1Thread4of5ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,321 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread4of5ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,321 WARN L313 ript$VariableManager]: TermVariabe thr1Thread4of5ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,321 WARN L313 ript$VariableManager]: TermVariabe thr1Thread4of5ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,321 WARN L313 ript$VariableManager]: TermVariabe thr1Thread4of5ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,321 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread4of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,321 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread4of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,322 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread5of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,322 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread5of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,322 WARN L313 ript$VariableManager]: TermVariabe thr1Thread5of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,322 WARN L313 ript$VariableManager]: TermVariabe thr1Thread5of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,322 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread5of5ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,322 WARN L313 ript$VariableManager]: TermVariabe thr1Thread5of5ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,323 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread5of5ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,323 WARN L313 ript$VariableManager]: TermVariabe thr1Thread5of5ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,323 WARN L313 ript$VariableManager]: TermVariabe thr1Thread5of5ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,323 WARN L313 ript$VariableManager]: TermVariabe thr1Thread5of5ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,323 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread5of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,323 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread5of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,324 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of5ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,324 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,324 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,324 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,324 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,324 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of5ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,330 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,331 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of5ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,331 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,331 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,331 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,331 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of5ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,332 WARN L313 ript$VariableManager]: TermVariabe thr1Thread3of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,332 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread3of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,333 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread3of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,333 WARN L313 ript$VariableManager]: TermVariabe thr1Thread3of5ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,333 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread3of5ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,333 WARN L313 ript$VariableManager]: TermVariabe thr1Thread3of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,334 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread4of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,334 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread4of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,335 WARN L313 ript$VariableManager]: TermVariabe thr1Thread4of5ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,335 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread4of5ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,335 WARN L313 ript$VariableManager]: TermVariabe thr1Thread4of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,335 WARN L313 ript$VariableManager]: TermVariabe thr1Thread4of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,336 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread5of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,336 WARN L313 ript$VariableManager]: TermVariabe thr1Thread5of5ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,336 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread5of5ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,337 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread5of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,337 WARN L313 ript$VariableManager]: TermVariabe thr1Thread5of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,337 WARN L313 ript$VariableManager]: TermVariabe thr1Thread5of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,338 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of5ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,338 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of5ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,338 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of5ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,338 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of5ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,339 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of5ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,340 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of5ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,340 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of5ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,340 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread2of5ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,340 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of5ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,340 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread2of5ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,341 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread3of5ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,342 WARN L313 ript$VariableManager]: TermVariabe thr2Thread3of5ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,342 WARN L313 ript$VariableManager]: TermVariabe thr2Thread3of5ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,342 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread3of5ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,342 WARN L313 ript$VariableManager]: TermVariabe thr2Thread3of5ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,343 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread4of5ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,343 WARN L313 ript$VariableManager]: TermVariabe thr2Thread4of5ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,344 WARN L313 ript$VariableManager]: TermVariabe thr2Thread4of5ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,344 WARN L313 ript$VariableManager]: TermVariabe thr2Thread4of5ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,344 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread4of5ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,345 WARN L313 ript$VariableManager]: TermVariabe thr2Thread5of5ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,345 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread5of5ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,346 WARN L313 ript$VariableManager]: TermVariabe thr2Thread5of5ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,346 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread5of5ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,346 WARN L313 ript$VariableManager]: TermVariabe thr2Thread5of5ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 12:14:40,347 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-10-16 12:14:40,347 INFO L253 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2020-10-16 12:14:40,347 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-16 12:14:40,348 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-16 12:14:40,348 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-16 12:14:40,348 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-16 12:14:40,348 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-16 12:14:40,348 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-16 12:14:40,348 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-16 12:14:40,348 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-16 12:14:40,350 INFO L137 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2020-10-16 12:14:40,350 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 148 places, 133 transitions, 356 flow [2020-10-16 12:14:40,350 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 148 places, 133 transitions, 356 flow [2020-10-16 12:14:40,350 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 148 places, 133 transitions, 356 flow [2020-10-16 12:14:40,370 INFO L129 PetriNetUnfolder]: 8/159 cut-off events. [2020-10-16 12:14:40,370 INFO L130 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2020-10-16 12:14:40,372 INFO L80 FinitePrefix]: Finished finitePrefix Result has 197 conditions, 159 events. 8/159 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 297 event pairs, 0 based on Foata normal form. 0/144 useless extension candidates. Maximal degree in co-relation 186. Up to 12 conditions per place. [2020-10-16 12:14:40,377 INFO L117 LiptonReduction]: Number of co-enabled transitions 2860 [2020-10-16 12:14:42,291 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2020-10-16 12:14:42,886 INFO L132 LiptonReduction]: Checked pairs total: 4341 [2020-10-16 12:14:42,886 INFO L134 LiptonReduction]: Total number of compositions: 126 [2020-10-16 12:14:42,886 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 61 places, 39 transitions, 168 flow [2020-10-16 12:14:43,417 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 6191 states. [2020-10-16 12:14:43,418 INFO L276 IsEmpty]: Start isEmpty. Operand 6191 states. [2020-10-16 12:14:43,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-10-16 12:14:43,418 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:14:43,418 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-10-16 12:14:43,418 INFO L429 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]=== [2020-10-16 12:14:43,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:14:43,419 INFO L82 PathProgramCache]: Analyzing trace with hash 1129837, now seen corresponding path program 1 times [2020-10-16 12:14:43,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:14:43,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771897421] [2020-10-16 12:14:43,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:14:43,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:14:43,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:14:43,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771897421] [2020-10-16 12:14:43,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 12:14:43,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-10-16 12:14:43,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363030916] [2020-10-16 12:14:43,431 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-16 12:14:43,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:14:43,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-16 12:14:43,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 12:14:43,431 INFO L87 Difference]: Start difference. First operand 6191 states. Second operand 3 states. [2020-10-16 12:14:43,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:14:43,515 INFO L93 Difference]: Finished difference Result 5844 states and 26316 transitions. [2020-10-16 12:14:43,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-16 12:14:43,516 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-10-16 12:14:43,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:14:43,534 INFO L225 Difference]: With dead ends: 5844 [2020-10-16 12:14:43,534 INFO L226 Difference]: Without dead ends: 5479 [2020-10-16 12:14:43,535 INFO L677 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 [2020-10-16 12:14:43,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5479 states. [2020-10-16 12:14:43,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5479 to 5479. [2020-10-16 12:14:43,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5479 states. [2020-10-16 12:14:43,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5479 states to 5479 states and 24493 transitions. [2020-10-16 12:14:43,683 INFO L78 Accepts]: Start accepts. Automaton has 5479 states and 24493 transitions. Word has length 3 [2020-10-16 12:14:43,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:14:43,683 INFO L481 AbstractCegarLoop]: Abstraction has 5479 states and 24493 transitions. [2020-10-16 12:14:43,683 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-16 12:14:43,684 INFO L276 IsEmpty]: Start isEmpty. Operand 5479 states and 24493 transitions. [2020-10-16 12:14:43,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-16 12:14:43,684 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:14:43,684 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:14:43,684 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-16 12:14:43,684 INFO L429 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]=== [2020-10-16 12:14:43,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:14:43,684 INFO L82 PathProgramCache]: Analyzing trace with hash 683068333, now seen corresponding path program 1 times [2020-10-16 12:14:43,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:14:43,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228716864] [2020-10-16 12:14:43,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:14:43,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:14:43,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:14:43,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228716864] [2020-10-16 12:14:43,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 12:14:43,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 12:14:43,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487584875] [2020-10-16 12:14:43,711 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-16 12:14:43,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:14:43,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-16 12:14:43,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-16 12:14:43,711 INFO L87 Difference]: Start difference. First operand 5479 states and 24493 transitions. Second operand 5 states. [2020-10-16 12:14:43,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:14:43,887 INFO L93 Difference]: Finished difference Result 11373 states and 46632 transitions. [2020-10-16 12:14:43,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 12:14:43,888 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2020-10-16 12:14:43,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:14:43,913 INFO L225 Difference]: With dead ends: 11373 [2020-10-16 12:14:43,913 INFO L226 Difference]: Without dead ends: 11366 [2020-10-16 12:14:43,913 INFO L677 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 [2020-10-16 12:14:43,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11366 states. [2020-10-16 12:14:44,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11366 to 6331. [2020-10-16 12:14:44,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6331 states. [2020-10-16 12:14:44,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6331 states to 6331 states and 28544 transitions. [2020-10-16 12:14:44,123 INFO L78 Accepts]: Start accepts. Automaton has 6331 states and 28544 transitions. Word has length 9 [2020-10-16 12:14:44,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:14:44,123 INFO L481 AbstractCegarLoop]: Abstraction has 6331 states and 28544 transitions. [2020-10-16 12:14:44,124 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-16 12:14:44,124 INFO L276 IsEmpty]: Start isEmpty. Operand 6331 states and 28544 transitions. [2020-10-16 12:14:44,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 12:14:44,124 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:14:44,124 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:14:44,124 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-16 12:14:44,124 INFO L429 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]=== [2020-10-16 12:14:44,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:14:44,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1472806829, now seen corresponding path program 1 times [2020-10-16 12:14:44,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:14:44,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331536663] [2020-10-16 12:14:44,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:14:44,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:14:44,152 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 12:14:44,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331536663] [2020-10-16 12:14:44,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 12:14:44,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 12:14:44,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149641177] [2020-10-16 12:14:44,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-16 12:14:44,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:14:44,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-16 12:14:44,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-16 12:14:44,154 INFO L87 Difference]: Start difference. First operand 6331 states and 28544 transitions. Second operand 5 states. [2020-10-16 12:14:44,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:14:44,345 INFO L93 Difference]: Finished difference Result 12785 states and 53129 transitions. [2020-10-16 12:14:44,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 12:14:44,345 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-10-16 12:14:44,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:14:44,375 INFO L225 Difference]: With dead ends: 12785 [2020-10-16 12:14:44,376 INFO L226 Difference]: Without dead ends: 12772 [2020-10-16 12:14:44,376 INFO L677 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 [2020-10-16 12:14:44,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12772 states. [2020-10-16 12:14:44,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12772 to 7391. [2020-10-16 12:14:44,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7391 states. [2020-10-16 12:14:44,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7391 states to 7391 states and 33694 transitions. [2020-10-16 12:14:44,622 INFO L78 Accepts]: Start accepts. Automaton has 7391 states and 33694 transitions. Word has length 13 [2020-10-16 12:14:44,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:14:44,622 INFO L481 AbstractCegarLoop]: Abstraction has 7391 states and 33694 transitions. [2020-10-16 12:14:44,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-16 12:14:44,622 INFO L276 IsEmpty]: Start isEmpty. Operand 7391 states and 33694 transitions. [2020-10-16 12:14:44,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-16 12:14:44,622 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:14:44,623 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:14:44,623 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-16 12:14:44,623 INFO L429 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]=== [2020-10-16 12:14:44,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:14:44,623 INFO L82 PathProgramCache]: Analyzing trace with hash 1682184658, now seen corresponding path program 1 times [2020-10-16 12:14:44,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:14:44,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094021085] [2020-10-16 12:14:44,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:14:44,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:14:44,688 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:14:44,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094021085] [2020-10-16 12:14:44,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294947219] [2020-10-16 12:14:44,689 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:14:44,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:14:44,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 12:14:44,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:14:44,904 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:14:44,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:14:44,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 12:14:44,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731025555] [2020-10-16 12:14:44,905 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 12:14:44,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:14:44,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 12:14:44,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2020-10-16 12:14:44,906 INFO L87 Difference]: Start difference. First operand 7391 states and 33694 transitions. Second operand 17 states. [2020-10-16 12:14:46,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:14:46,271 INFO L93 Difference]: Finished difference Result 23028 states and 86558 transitions. [2020-10-16 12:14:46,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-16 12:14:46,272 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 15 [2020-10-16 12:14:46,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:14:47,083 INFO L225 Difference]: With dead ends: 23028 [2020-10-16 12:14:47,084 INFO L226 Difference]: Without dead ends: 23017 [2020-10-16 12:14:47,084 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=372, Invalid=1434, Unknown=0, NotChecked=0, Total=1806 [2020-10-16 12:14:47,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23017 states. [2020-10-16 12:14:47,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23017 to 7423. [2020-10-16 12:14:47,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7423 states. [2020-10-16 12:14:47,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7423 states to 7423 states and 33792 transitions. [2020-10-16 12:14:47,431 INFO L78 Accepts]: Start accepts. Automaton has 7423 states and 33792 transitions. Word has length 15 [2020-10-16 12:14:47,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:14:47,431 INFO L481 AbstractCegarLoop]: Abstraction has 7423 states and 33792 transitions. [2020-10-16 12:14:47,431 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 12:14:47,431 INFO L276 IsEmpty]: Start isEmpty. Operand 7423 states and 33792 transitions. [2020-10-16 12:14:47,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-16 12:14:47,432 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:14:47,432 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:14:47,632 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-10-16 12:14:47,633 INFO L429 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]=== [2020-10-16 12:14:47,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:14:47,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1971855314, now seen corresponding path program 2 times [2020-10-16 12:14:47,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:14:47,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507807334] [2020-10-16 12:14:47,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:14:47,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:14:47,704 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:14:47,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507807334] [2020-10-16 12:14:47,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125752362] [2020-10-16 12:14:47,705 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:14:47,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 12:14:47,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:14:47,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 12:14:47,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:14:47,907 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:14:47,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:14:47,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 12:14:47,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289654666] [2020-10-16 12:14:47,908 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 12:14:47,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:14:47,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 12:14:47,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2020-10-16 12:14:47,909 INFO L87 Difference]: Start difference. First operand 7423 states and 33792 transitions. Second operand 17 states. [2020-10-16 12:14:49,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:14:49,192 INFO L93 Difference]: Finished difference Result 30060 states and 115063 transitions. [2020-10-16 12:14:49,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-16 12:14:49,193 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 15 [2020-10-16 12:14:49,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:14:49,274 INFO L225 Difference]: With dead ends: 30060 [2020-10-16 12:14:49,274 INFO L226 Difference]: Without dead ends: 30038 [2020-10-16 12:14:49,274 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=410, Invalid=1396, Unknown=0, NotChecked=0, Total=1806 [2020-10-16 12:14:49,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30038 states. [2020-10-16 12:14:49,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30038 to 7168. [2020-10-16 12:14:49,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7168 states. [2020-10-16 12:14:49,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7168 states to 7168 states and 32668 transitions. [2020-10-16 12:14:49,692 INFO L78 Accepts]: Start accepts. Automaton has 7168 states and 32668 transitions. Word has length 15 [2020-10-16 12:14:49,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:14:49,692 INFO L481 AbstractCegarLoop]: Abstraction has 7168 states and 32668 transitions. [2020-10-16 12:14:49,692 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 12:14:49,693 INFO L276 IsEmpty]: Start isEmpty. Operand 7168 states and 32668 transitions. [2020-10-16 12:14:49,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 12:14:49,693 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:14:49,693 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:14:49,901 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-10-16 12:14:49,902 INFO L429 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]=== [2020-10-16 12:14:49,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:14:49,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1257206282, now seen corresponding path program 1 times [2020-10-16 12:14:49,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:14:49,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082121285] [2020-10-16 12:14:49,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:14:49,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:14:49,935 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-16 12:14:49,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082121285] [2020-10-16 12:14:49,935 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 12:14:49,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 12:14:49,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721935484] [2020-10-16 12:14:49,936 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-16 12:14:49,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:14:49,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-16 12:14:49,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-16 12:14:49,937 INFO L87 Difference]: Start difference. First operand 7168 states and 32668 transitions. Second operand 5 states. [2020-10-16 12:14:50,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:14:50,137 INFO L93 Difference]: Finished difference Result 14114 states and 59552 transitions. [2020-10-16 12:14:50,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 12:14:50,138 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-10-16 12:14:50,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:14:50,176 INFO L225 Difference]: With dead ends: 14114 [2020-10-16 12:14:50,177 INFO L226 Difference]: Without dead ends: 14092 [2020-10-16 12:14:50,177 INFO L677 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 [2020-10-16 12:14:50,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14092 states. [2020-10-16 12:14:50,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14092 to 8447. [2020-10-16 12:14:50,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8447 states. [2020-10-16 12:14:50,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8447 states to 8447 states and 38789 transitions. [2020-10-16 12:14:50,634 INFO L78 Accepts]: Start accepts. Automaton has 8447 states and 38789 transitions. Word has length 17 [2020-10-16 12:14:50,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:14:50,634 INFO L481 AbstractCegarLoop]: Abstraction has 8447 states and 38789 transitions. [2020-10-16 12:14:50,635 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-16 12:14:50,635 INFO L276 IsEmpty]: Start isEmpty. Operand 8447 states and 38789 transitions. [2020-10-16 12:14:50,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 12:14:50,635 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:14:50,635 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:14:50,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-16 12:14:50,636 INFO L429 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]=== [2020-10-16 12:14:50,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:14:50,636 INFO L82 PathProgramCache]: Analyzing trace with hash 631632905, now seen corresponding path program 1 times [2020-10-16 12:14:50,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:14:50,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807212060] [2020-10-16 12:14:50,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:14:50,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:14:50,752 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:14:50,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807212060] [2020-10-16 12:14:50,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912806766] [2020-10-16 12:14:50,752 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:14:50,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:14:50,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 12:14:50,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:14:50,994 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:14:50,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:14:50,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-16 12:14:50,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422892219] [2020-10-16 12:14:50,995 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 12:14:50,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:14:50,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 12:14:50,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2020-10-16 12:14:50,996 INFO L87 Difference]: Start difference. First operand 8447 states and 38789 transitions. Second operand 19 states. [2020-10-16 12:14:52,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:14:52,944 INFO L93 Difference]: Finished difference Result 23186 states and 91083 transitions. [2020-10-16 12:14:52,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-16 12:14:52,945 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 19 [2020-10-16 12:14:52,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:14:53,007 INFO L225 Difference]: With dead ends: 23186 [2020-10-16 12:14:53,007 INFO L226 Difference]: Without dead ends: 23170 [2020-10-16 12:14:53,007 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=520, Invalid=2030, Unknown=0, NotChecked=0, Total=2550 [2020-10-16 12:14:53,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23170 states. [2020-10-16 12:14:53,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23170 to 8503. [2020-10-16 12:14:53,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8503 states. [2020-10-16 12:14:53,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8503 states to 8503 states and 38957 transitions. [2020-10-16 12:14:53,396 INFO L78 Accepts]: Start accepts. Automaton has 8503 states and 38957 transitions. Word has length 19 [2020-10-16 12:14:53,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:14:53,396 INFO L481 AbstractCegarLoop]: Abstraction has 8503 states and 38957 transitions. [2020-10-16 12:14:53,396 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 12:14:53,396 INFO L276 IsEmpty]: Start isEmpty. Operand 8503 states and 38957 transitions. [2020-10-16 12:14:53,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 12:14:53,397 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:14:53,397 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:14:53,610 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-10-16 12:14:53,611 INFO L429 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]=== [2020-10-16 12:14:53,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:14:53,611 INFO L82 PathProgramCache]: Analyzing trace with hash -968342726, now seen corresponding path program 1 times [2020-10-16 12:14:53,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:14:53,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302317870] [2020-10-16 12:14:53,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:14:53,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:14:53,684 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-16 12:14:53,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302317870] [2020-10-16 12:14:53,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864786330] [2020-10-16 12:14:53,685 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:14:53,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:14:53,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 12:14:53,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:14:53,902 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:14:53,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:14:53,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2020-10-16 12:14:53,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742358413] [2020-10-16 12:14:53,903 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 12:14:53,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:14:53,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 12:14:53,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2020-10-16 12:14:53,904 INFO L87 Difference]: Start difference. First operand 8503 states and 38957 transitions. Second operand 18 states. [2020-10-16 12:14:56,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:14:56,009 INFO L93 Difference]: Finished difference Result 27791 states and 107775 transitions. [2020-10-16 12:14:56,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-16 12:14:56,010 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 19 [2020-10-16 12:14:56,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:14:56,075 INFO L225 Difference]: With dead ends: 27791 [2020-10-16 12:14:56,076 INFO L226 Difference]: Without dead ends: 27772 [2020-10-16 12:14:56,076 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 766 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=583, Invalid=2173, Unknown=0, NotChecked=0, Total=2756 [2020-10-16 12:14:56,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27772 states. [2020-10-16 12:14:56,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27772 to 9012. [2020-10-16 12:14:56,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9012 states. [2020-10-16 12:14:56,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9012 states to 9012 states and 41589 transitions. [2020-10-16 12:14:56,531 INFO L78 Accepts]: Start accepts. Automaton has 9012 states and 41589 transitions. Word has length 19 [2020-10-16 12:14:56,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:14:56,531 INFO L481 AbstractCegarLoop]: Abstraction has 9012 states and 41589 transitions. [2020-10-16 12:14:56,531 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 12:14:56,532 INFO L276 IsEmpty]: Start isEmpty. Operand 9012 states and 41589 transitions. [2020-10-16 12:14:56,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 12:14:56,532 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:14:56,532 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:14:56,733 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:14:56,733 INFO L429 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]=== [2020-10-16 12:14:56,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:14:56,734 INFO L82 PathProgramCache]: Analyzing trace with hash 1289406842, now seen corresponding path program 2 times [2020-10-16 12:14:56,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:14:56,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913560108] [2020-10-16 12:14:56,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:14:56,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:14:56,822 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:14:56,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913560108] [2020-10-16 12:14:56,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003515823] [2020-10-16 12:14:56,823 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:14:56,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 12:14:56,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:14:56,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 12:14:56,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:14:57,124 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-16 12:14:57,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:14:57,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2020-10-16 12:14:57,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318591367] [2020-10-16 12:14:57,125 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 12:14:57,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:14:57,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 12:14:57,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2020-10-16 12:14:57,126 INFO L87 Difference]: Start difference. First operand 9012 states and 41589 transitions. Second operand 18 states. [2020-10-16 12:14:58,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:14:58,711 INFO L93 Difference]: Finished difference Result 21129 states and 84275 transitions. [2020-10-16 12:14:58,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 12:14:58,712 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 19 [2020-10-16 12:14:58,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:14:58,767 INFO L225 Difference]: With dead ends: 21129 [2020-10-16 12:14:58,767 INFO L226 Difference]: Without dead ends: 21095 [2020-10-16 12:14:58,768 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=359, Invalid=1201, Unknown=0, NotChecked=0, Total=1560 [2020-10-16 12:14:58,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21095 states. [2020-10-16 12:14:59,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21095 to 8468. [2020-10-16 12:14:59,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8468 states. [2020-10-16 12:14:59,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8468 states to 8468 states and 38762 transitions. [2020-10-16 12:14:59,120 INFO L78 Accepts]: Start accepts. Automaton has 8468 states and 38762 transitions. Word has length 19 [2020-10-16 12:14:59,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:14:59,120 INFO L481 AbstractCegarLoop]: Abstraction has 8468 states and 38762 transitions. [2020-10-16 12:14:59,120 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 12:14:59,120 INFO L276 IsEmpty]: Start isEmpty. Operand 8468 states and 38762 transitions. [2020-10-16 12:14:59,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 12:14:59,121 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:14:59,121 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:14:59,321 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:14:59,322 INFO L429 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]=== [2020-10-16 12:14:59,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:14:59,322 INFO L82 PathProgramCache]: Analyzing trace with hash 1289437129, now seen corresponding path program 2 times [2020-10-16 12:14:59,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:14:59,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254326288] [2020-10-16 12:14:59,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:14:59,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:14:59,409 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:14:59,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254326288] [2020-10-16 12:14:59,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424736832] [2020-10-16 12:14:59,410 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:14:59,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 12:14:59,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:14:59,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 12:14:59,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:14:59,630 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-16 12:14:59,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:14:59,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2020-10-16 12:14:59,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014770281] [2020-10-16 12:14:59,632 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 12:14:59,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:14:59,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 12:14:59,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2020-10-16 12:14:59,633 INFO L87 Difference]: Start difference. First operand 8468 states and 38762 transitions. Second operand 18 states. [2020-10-16 12:15:01,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:15:01,098 INFO L93 Difference]: Finished difference Result 23563 states and 95745 transitions. [2020-10-16 12:15:01,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 12:15:01,099 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 19 [2020-10-16 12:15:01,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:15:01,158 INFO L225 Difference]: With dead ends: 23563 [2020-10-16 12:15:01,159 INFO L226 Difference]: Without dead ends: 23520 [2020-10-16 12:15:01,159 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=359, Invalid=1201, Unknown=0, NotChecked=0, Total=1560 [2020-10-16 12:15:01,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23520 states. [2020-10-16 12:15:01,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23520 to 8329. [2020-10-16 12:15:01,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8329 states. [2020-10-16 12:15:01,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8329 states to 8329 states and 38184 transitions. [2020-10-16 12:15:01,546 INFO L78 Accepts]: Start accepts. Automaton has 8329 states and 38184 transitions. Word has length 19 [2020-10-16 12:15:01,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:15:01,546 INFO L481 AbstractCegarLoop]: Abstraction has 8329 states and 38184 transitions. [2020-10-16 12:15:01,546 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 12:15:01,546 INFO L276 IsEmpty]: Start isEmpty. Operand 8329 states and 38184 transitions. [2020-10-16 12:15:01,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 12:15:01,547 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:15:01,547 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:15:01,761 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:15:01,762 INFO L429 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]=== [2020-10-16 12:15:01,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:15:01,762 INFO L82 PathProgramCache]: Analyzing trace with hash -848936583, now seen corresponding path program 1 times [2020-10-16 12:15:01,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:15:01,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956931147] [2020-10-16 12:15:01,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:15:01,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:15:01,875 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-16 12:15:01,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956931147] [2020-10-16 12:15:01,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058824594] [2020-10-16 12:15:01,875 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 [2020-10-16 12:15:01,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:15:01,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 12:15:01,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:15:02,228 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:15:02,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:15:02,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2020-10-16 12:15:02,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521843821] [2020-10-16 12:15:02,229 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 12:15:02,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:15:02,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 12:15:02,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2020-10-16 12:15:02,230 INFO L87 Difference]: Start difference. First operand 8329 states and 38184 transitions. Second operand 22 states. [2020-10-16 12:15:09,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:15:09,797 INFO L93 Difference]: Finished difference Result 49760 states and 175603 transitions. [2020-10-16 12:15:09,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2020-10-16 12:15:09,797 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 21 [2020-10-16 12:15:09,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:15:09,913 INFO L225 Difference]: With dead ends: 49760 [2020-10-16 12:15:09,913 INFO L226 Difference]: Without dead ends: 49711 [2020-10-16 12:15:09,914 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8358 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=3188, Invalid=17982, Unknown=0, NotChecked=0, Total=21170 [2020-10-16 12:15:10,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49711 states. [2020-10-16 12:15:10,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49711 to 8689. [2020-10-16 12:15:10,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8689 states. [2020-10-16 12:15:10,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8689 states to 8689 states and 39965 transitions. [2020-10-16 12:15:10,597 INFO L78 Accepts]: Start accepts. Automaton has 8689 states and 39965 transitions. Word has length 21 [2020-10-16 12:15:10,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:15:10,597 INFO L481 AbstractCegarLoop]: Abstraction has 8689 states and 39965 transitions. [2020-10-16 12:15:10,597 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 12:15:10,597 INFO L276 IsEmpty]: Start isEmpty. Operand 8689 states and 39965 transitions. [2020-10-16 12:15:10,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 12:15:10,598 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:15:10,598 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:15:10,799 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-10-16 12:15:10,799 INFO L429 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]=== [2020-10-16 12:15:10,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:15:10,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1408812985, now seen corresponding path program 2 times [2020-10-16 12:15:10,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:15:10,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26748865] [2020-10-16 12:15:10,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:15:10,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:15:10,921 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:15:10,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26748865] [2020-10-16 12:15:10,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515367932] [2020-10-16 12:15:10,922 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:15:10,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 12:15:10,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:15:10,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 12:15:10,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:15:11,246 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:15:11,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:15:11,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2020-10-16 12:15:11,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368138590] [2020-10-16 12:15:11,247 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 12:15:11,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:15:11,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 12:15:11,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2020-10-16 12:15:11,248 INFO L87 Difference]: Start difference. First operand 8689 states and 39965 transitions. Second operand 23 states. [2020-10-16 12:15:18,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:15:18,240 INFO L93 Difference]: Finished difference Result 57732 states and 209301 transitions. [2020-10-16 12:15:18,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2020-10-16 12:15:18,241 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 21 [2020-10-16 12:15:18,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:15:18,387 INFO L225 Difference]: With dead ends: 57732 [2020-10-16 12:15:18,387 INFO L226 Difference]: Without dead ends: 57655 [2020-10-16 12:15:18,389 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6660 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=2902, Invalid=14920, Unknown=0, NotChecked=0, Total=17822 [2020-10-16 12:15:18,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57655 states. [2020-10-16 12:15:19,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57655 to 8775. [2020-10-16 12:15:19,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8775 states. [2020-10-16 12:15:19,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8775 states to 8775 states and 40541 transitions. [2020-10-16 12:15:19,114 INFO L78 Accepts]: Start accepts. Automaton has 8775 states and 40541 transitions. Word has length 21 [2020-10-16 12:15:19,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:15:19,115 INFO L481 AbstractCegarLoop]: Abstraction has 8775 states and 40541 transitions. [2020-10-16 12:15:19,115 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 12:15:19,115 INFO L276 IsEmpty]: Start isEmpty. Operand 8775 states and 40541 transitions. [2020-10-16 12:15:19,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 12:15:19,116 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:15:19,116 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:15:19,316 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:15:19,317 INFO L429 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]=== [2020-10-16 12:15:19,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:15:19,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1091422073, now seen corresponding path program 3 times [2020-10-16 12:15:19,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:15:19,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699092841] [2020-10-16 12:15:19,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:15:19,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:15:19,422 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:15:19,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699092841] [2020-10-16 12:15:19,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862872505] [2020-10-16 12:15:19,423 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:15:19,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 12:15:19,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:15:19,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 12:15:19,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:15:19,731 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:15:19,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:15:19,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2020-10-16 12:15:19,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239634811] [2020-10-16 12:15:19,733 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 12:15:19,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:15:19,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 12:15:19,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2020-10-16 12:15:19,733 INFO L87 Difference]: Start difference. First operand 8775 states and 40541 transitions. Second operand 22 states. [2020-10-16 12:15:31,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:15:31,711 INFO L93 Difference]: Finished difference Result 70575 states and 243633 transitions. [2020-10-16 12:15:31,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 214 states. [2020-10-16 12:15:31,713 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 21 [2020-10-16 12:15:31,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:15:31,892 INFO L225 Difference]: With dead ends: 70575 [2020-10-16 12:15:31,892 INFO L226 Difference]: Without dead ends: 70552 [2020-10-16 12:15:31,894 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22179 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=7522, Invalid=44690, Unknown=0, NotChecked=0, Total=52212 [2020-10-16 12:15:32,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70552 states. [2020-10-16 12:15:32,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70552 to 9021. [2020-10-16 12:15:32,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9021 states. [2020-10-16 12:15:32,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9021 states to 9021 states and 41841 transitions. [2020-10-16 12:15:32,761 INFO L78 Accepts]: Start accepts. Automaton has 9021 states and 41841 transitions. Word has length 21 [2020-10-16 12:15:32,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:15:32,762 INFO L481 AbstractCegarLoop]: Abstraction has 9021 states and 41841 transitions. [2020-10-16 12:15:32,762 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 12:15:32,762 INFO L276 IsEmpty]: Start isEmpty. Operand 9021 states and 41841 transitions. [2020-10-16 12:15:32,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 12:15:32,763 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:15:32,763 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:15:32,963 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-10-16 12:15:32,964 INFO L429 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]=== [2020-10-16 12:15:32,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:15:32,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1430553849, now seen corresponding path program 4 times [2020-10-16 12:15:32,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:15:32,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227709760] [2020-10-16 12:15:32,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:15:32,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:15:33,092 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-16 12:15:33,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227709760] [2020-10-16 12:15:33,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896838822] [2020-10-16 12:15:33,093 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:15:33,168 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 12:15:33,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:15:33,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 12:15:33,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:15:33,405 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:15:33,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:15:33,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2020-10-16 12:15:33,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712778355] [2020-10-16 12:15:33,407 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 12:15:33,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:15:33,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 12:15:33,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2020-10-16 12:15:33,407 INFO L87 Difference]: Start difference. First operand 9021 states and 41841 transitions. Second operand 22 states. [2020-10-16 12:15:41,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:15:41,703 INFO L93 Difference]: Finished difference Result 65964 states and 236644 transitions. [2020-10-16 12:15:41,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2020-10-16 12:15:41,704 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 21 [2020-10-16 12:15:41,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:15:41,860 INFO L225 Difference]: With dead ends: 65964 [2020-10-16 12:15:41,861 INFO L226 Difference]: Without dead ends: 65903 [2020-10-16 12:15:41,862 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10005 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=3890, Invalid=20916, Unknown=0, NotChecked=0, Total=24806 [2020-10-16 12:15:42,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65903 states. [2020-10-16 12:15:42,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65903 to 9345. [2020-10-16 12:15:42,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9345 states. [2020-10-16 12:15:42,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9345 states to 9345 states and 43708 transitions. [2020-10-16 12:15:42,721 INFO L78 Accepts]: Start accepts. Automaton has 9345 states and 43708 transitions. Word has length 21 [2020-10-16 12:15:42,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:15:42,721 INFO L481 AbstractCegarLoop]: Abstraction has 9345 states and 43708 transitions. [2020-10-16 12:15:42,721 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 12:15:42,721 INFO L276 IsEmpty]: Start isEmpty. Operand 9345 states and 43708 transitions. [2020-10-16 12:15:42,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 12:15:42,722 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:15:42,723 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:15:42,930 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:15:42,931 INFO L429 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]=== [2020-10-16 12:15:42,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:15:42,932 INFO L82 PathProgramCache]: Analyzing trace with hash -2125563079, now seen corresponding path program 5 times [2020-10-16 12:15:42,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:15:42,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821016694] [2020-10-16 12:15:42,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:15:42,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:15:43,065 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:15:43,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821016694] [2020-10-16 12:15:43,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326735181] [2020-10-16 12:15:43,066 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:15:43,137 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 12:15:43,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:15:43,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 12:15:43,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:15:43,411 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:15:43,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:15:43,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2020-10-16 12:15:43,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162351148] [2020-10-16 12:15:43,412 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 12:15:43,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:15:43,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 12:15:43,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2020-10-16 12:15:43,413 INFO L87 Difference]: Start difference. First operand 9345 states and 43708 transitions. Second operand 23 states. [2020-10-16 12:15:51,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:15:51,077 INFO L93 Difference]: Finished difference Result 71061 states and 259788 transitions. [2020-10-16 12:15:51,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2020-10-16 12:15:51,078 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 21 [2020-10-16 12:15:51,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:15:51,261 INFO L225 Difference]: With dead ends: 71061 [2020-10-16 12:15:51,262 INFO L226 Difference]: Without dead ends: 71040 [2020-10-16 12:15:51,263 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8530 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=3842, Invalid=18210, Unknown=0, NotChecked=0, Total=22052 [2020-10-16 12:15:51,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71040 states. [2020-10-16 12:15:52,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71040 to 8900. [2020-10-16 12:15:52,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8900 states. [2020-10-16 12:15:52,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8900 states to 8900 states and 41516 transitions. [2020-10-16 12:15:52,158 INFO L78 Accepts]: Start accepts. Automaton has 8900 states and 41516 transitions. Word has length 21 [2020-10-16 12:15:52,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:15:52,158 INFO L481 AbstractCegarLoop]: Abstraction has 8900 states and 41516 transitions. [2020-10-16 12:15:52,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 12:15:52,158 INFO L276 IsEmpty]: Start isEmpty. Operand 8900 states and 41516 transitions. [2020-10-16 12:15:52,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 12:15:52,159 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:15:52,160 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:15:52,360 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-10-16 12:15:52,360 INFO L429 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]=== [2020-10-16 12:15:52,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:15:52,361 INFO L82 PathProgramCache]: Analyzing trace with hash -2096487559, now seen corresponding path program 6 times [2020-10-16 12:15:52,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:15:52,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894769944] [2020-10-16 12:15:52,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:15:52,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:15:52,649 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:15:52,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894769944] [2020-10-16 12:15:52,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481074536] [2020-10-16 12:15:52,650 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:15:52,725 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 12:15:52,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:15:52,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 12:15:52,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:15:53,010 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:15:53,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:15:53,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2020-10-16 12:15:53,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175014104] [2020-10-16 12:15:53,011 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 12:15:53,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:15:53,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 12:15:53,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2020-10-16 12:15:53,012 INFO L87 Difference]: Start difference. First operand 8900 states and 41516 transitions. Second operand 23 states. [2020-10-16 12:16:01,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:16:01,465 INFO L93 Difference]: Finished difference Result 78990 states and 293990 transitions. [2020-10-16 12:16:01,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2020-10-16 12:16:01,466 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 21 [2020-10-16 12:16:01,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:16:01,669 INFO L225 Difference]: With dead ends: 78990 [2020-10-16 12:16:01,669 INFO L226 Difference]: Without dead ends: 78937 [2020-10-16 12:16:01,671 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8128 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=3803, Invalid=17659, Unknown=0, NotChecked=0, Total=21462 [2020-10-16 12:16:02,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78937 states. [2020-10-16 12:16:04,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78937 to 8809. [2020-10-16 12:16:04,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8809 states. [2020-10-16 12:16:04,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8809 states to 8809 states and 41389 transitions. [2020-10-16 12:16:04,160 INFO L78 Accepts]: Start accepts. Automaton has 8809 states and 41389 transitions. Word has length 21 [2020-10-16 12:16:04,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:16:04,160 INFO L481 AbstractCegarLoop]: Abstraction has 8809 states and 41389 transitions. [2020-10-16 12:16:04,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 12:16:04,161 INFO L276 IsEmpty]: Start isEmpty. Operand 8809 states and 41389 transitions. [2020-10-16 12:16:04,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 12:16:04,162 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:16:04,162 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:16:04,363 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-10-16 12:16:04,363 INFO L429 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]=== [2020-10-16 12:16:04,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:16:04,364 INFO L82 PathProgramCache]: Analyzing trace with hash -305805433, now seen corresponding path program 1 times [2020-10-16 12:16:04,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:16:04,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975814671] [2020-10-16 12:16:04,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:16:04,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:16:04,394 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-16 12:16:04,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975814671] [2020-10-16 12:16:04,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 12:16:04,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 12:16:04,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391398159] [2020-10-16 12:16:04,396 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-16 12:16:04,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:16:04,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-16 12:16:04,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-16 12:16:04,396 INFO L87 Difference]: Start difference. First operand 8809 states and 41389 transitions. Second operand 5 states. [2020-10-16 12:16:04,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:16:04,658 INFO L93 Difference]: Finished difference Result 16236 states and 70853 transitions. [2020-10-16 12:16:04,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 12:16:04,659 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-10-16 12:16:04,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:16:04,707 INFO L225 Difference]: With dead ends: 16236 [2020-10-16 12:16:04,707 INFO L226 Difference]: Without dead ends: 16205 [2020-10-16 12:16:04,707 INFO L677 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 [2020-10-16 12:16:04,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16205 states. [2020-10-16 12:16:05,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16205 to 10346. [2020-10-16 12:16:05,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10346 states. [2020-10-16 12:16:05,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10346 states to 10346 states and 48549 transitions. [2020-10-16 12:16:05,060 INFO L78 Accepts]: Start accepts. Automaton has 10346 states and 48549 transitions. Word has length 21 [2020-10-16 12:16:05,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:16:05,060 INFO L481 AbstractCegarLoop]: Abstraction has 10346 states and 48549 transitions. [2020-10-16 12:16:05,060 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-16 12:16:05,061 INFO L276 IsEmpty]: Start isEmpty. Operand 10346 states and 48549 transitions. [2020-10-16 12:16:05,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 12:16:05,062 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:16:05,063 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:16:05,063 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-16 12:16:05,063 INFO L429 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]=== [2020-10-16 12:16:05,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:16:05,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1520619002, now seen corresponding path program 1 times [2020-10-16 12:16:05,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:16:05,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981496476] [2020-10-16 12:16:05,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:16:05,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:16:05,195 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:16:05,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981496476] [2020-10-16 12:16:05,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524012475] [2020-10-16 12:16:05,196 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 [2020-10-16 12:16:05,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:16:05,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 12:16:05,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:16:05,501 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:16:05,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:16:05,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2020-10-16 12:16:05,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448755657] [2020-10-16 12:16:05,502 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 12:16:05,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:16:05,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 12:16:05,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2020-10-16 12:16:05,503 INFO L87 Difference]: Start difference. First operand 10346 states and 48549 transitions. Second operand 21 states. [2020-10-16 12:16:08,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:16:08,186 INFO L93 Difference]: Finished difference Result 26273 states and 107247 transitions. [2020-10-16 12:16:08,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-16 12:16:08,186 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 23 [2020-10-16 12:16:08,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:16:08,261 INFO L225 Difference]: With dead ends: 26273 [2020-10-16 12:16:08,261 INFO L226 Difference]: Without dead ends: 26250 [2020-10-16 12:16:08,262 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=678, Invalid=2628, Unknown=0, NotChecked=0, Total=3306 [2020-10-16 12:16:08,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26250 states. [2020-10-16 12:16:08,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26250 to 10352. [2020-10-16 12:16:08,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10352 states. [2020-10-16 12:16:08,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10352 states to 10352 states and 48383 transitions. [2020-10-16 12:16:08,740 INFO L78 Accepts]: Start accepts. Automaton has 10352 states and 48383 transitions. Word has length 23 [2020-10-16 12:16:08,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:16:08,741 INFO L481 AbstractCegarLoop]: Abstraction has 10352 states and 48383 transitions. [2020-10-16 12:16:08,741 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 12:16:08,741 INFO L276 IsEmpty]: Start isEmpty. Operand 10352 states and 48383 transitions. [2020-10-16 12:16:08,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 12:16:08,744 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:16:08,744 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:16:08,959 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:16:08,960 INFO L429 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]=== [2020-10-16 12:16:08,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:16:08,960 INFO L82 PathProgramCache]: Analyzing trace with hash -2131590985, now seen corresponding path program 1 times [2020-10-16 12:16:08,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:16:08,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286385073] [2020-10-16 12:16:08,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:16:08,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:16:09,071 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 12:16:09,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286385073] [2020-10-16 12:16:09,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512016503] [2020-10-16 12:16:09,073 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 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 [2020-10-16 12:16:09,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:16:09,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 12:16:09,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:16:09,370 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:16:09,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:16:09,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2020-10-16 12:16:09,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674597872] [2020-10-16 12:16:09,371 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 12:16:09,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:16:09,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 12:16:09,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2020-10-16 12:16:09,371 INFO L87 Difference]: Start difference. First operand 10352 states and 48383 transitions. Second operand 20 states. [2020-10-16 12:16:10,231 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-10-16 12:16:12,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:16:12,341 INFO L93 Difference]: Finished difference Result 30223 states and 121571 transitions. [2020-10-16 12:16:12,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-16 12:16:12,342 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-16 12:16:12,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:16:12,419 INFO L225 Difference]: With dead ends: 30223 [2020-10-16 12:16:12,419 INFO L226 Difference]: Without dead ends: 30198 [2020-10-16 12:16:12,419 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 984 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=759, Invalid=2781, Unknown=0, NotChecked=0, Total=3540 [2020-10-16 12:16:12,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30198 states. [2020-10-16 12:16:12,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30198 to 10645. [2020-10-16 12:16:12,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10645 states. [2020-10-16 12:16:12,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10645 states to 10645 states and 49665 transitions. [2020-10-16 12:16:12,916 INFO L78 Accepts]: Start accepts. Automaton has 10645 states and 49665 transitions. Word has length 23 [2020-10-16 12:16:12,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:16:12,916 INFO L481 AbstractCegarLoop]: Abstraction has 10645 states and 49665 transitions. [2020-10-16 12:16:12,916 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 12:16:12,916 INFO L276 IsEmpty]: Start isEmpty. Operand 10645 states and 49665 transitions. [2020-10-16 12:16:12,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 12:16:12,918 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:16:12,918 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:16:13,119 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:16:13,119 INFO L429 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]=== [2020-10-16 12:16:13,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:16:13,120 INFO L82 PathProgramCache]: Analyzing trace with hash 2123174490, now seen corresponding path program 1 times [2020-10-16 12:16:13,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:16:13,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383157825] [2020-10-16 12:16:13,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:16:13,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:16:13,224 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 12:16:13,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383157825] [2020-10-16 12:16:13,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748618847] [2020-10-16 12:16:13,225 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 [2020-10-16 12:16:13,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:16:13,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 12:16:13,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:16:13,591 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:16:13,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:16:13,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 17 [2020-10-16 12:16:13,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718438993] [2020-10-16 12:16:13,592 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 12:16:13,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:16:13,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 12:16:13,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2020-10-16 12:16:13,593 INFO L87 Difference]: Start difference. First operand 10645 states and 49665 transitions. Second operand 19 states. [2020-10-16 12:16:16,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:16:16,048 INFO L93 Difference]: Finished difference Result 31457 states and 127515 transitions. [2020-10-16 12:16:16,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-16 12:16:16,050 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-16 12:16:16,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:16:16,127 INFO L225 Difference]: With dead ends: 31457 [2020-10-16 12:16:16,127 INFO L226 Difference]: Without dead ends: 31427 [2020-10-16 12:16:16,128 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 758 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=591, Invalid=2165, Unknown=0, NotChecked=0, Total=2756 [2020-10-16 12:16:16,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31427 states. [2020-10-16 12:16:16,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31427 to 11460. [2020-10-16 12:16:16,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11460 states. [2020-10-16 12:16:16,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11460 states to 11460 states and 53955 transitions. [2020-10-16 12:16:16,659 INFO L78 Accepts]: Start accepts. Automaton has 11460 states and 53955 transitions. Word has length 23 [2020-10-16 12:16:16,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:16:16,659 INFO L481 AbstractCegarLoop]: Abstraction has 11460 states and 53955 transitions. [2020-10-16 12:16:16,660 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 12:16:16,660 INFO L276 IsEmpty]: Start isEmpty. Operand 11460 states and 53955 transitions. [2020-10-16 12:16:16,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 12:16:16,662 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:16:16,662 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:16:16,863 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:16:16,863 INFO L429 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]=== [2020-10-16 12:16:16,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:16:16,864 INFO L82 PathProgramCache]: Analyzing trace with hash -1821264969, now seen corresponding path program 2 times [2020-10-16 12:16:16,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:16:16,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986960079] [2020-10-16 12:16:16,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:16:16,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:16:17,017 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:16:17,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986960079] [2020-10-16 12:16:17,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915862421] [2020-10-16 12:16:17,018 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 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 [2020-10-16 12:16:17,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 12:16:17,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:16:17,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 12:16:17,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:16:17,334 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-16 12:16:17,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:16:17,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 17 [2020-10-16 12:16:17,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810589972] [2020-10-16 12:16:17,336 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 12:16:17,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:16:17,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 12:16:17,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2020-10-16 12:16:17,336 INFO L87 Difference]: Start difference. First operand 11460 states and 53955 transitions. Second operand 19 states. [2020-10-16 12:16:20,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:16:20,242 INFO L93 Difference]: Finished difference Result 36038 states and 147232 transitions. [2020-10-16 12:16:20,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-16 12:16:20,243 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-16 12:16:20,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:16:20,333 INFO L225 Difference]: With dead ends: 36038 [2020-10-16 12:16:20,333 INFO L226 Difference]: Without dead ends: 35977 [2020-10-16 12:16:20,334 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=602, Invalid=1948, Unknown=0, NotChecked=0, Total=2550 [2020-10-16 12:16:20,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35977 states. [2020-10-16 12:16:20,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35977 to 11109. [2020-10-16 12:16:20,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11109 states. [2020-10-16 12:16:20,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11109 states to 11109 states and 52128 transitions. [2020-10-16 12:16:20,891 INFO L78 Accepts]: Start accepts. Automaton has 11109 states and 52128 transitions. Word has length 23 [2020-10-16 12:16:20,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:16:20,891 INFO L481 AbstractCegarLoop]: Abstraction has 11109 states and 52128 transitions. [2020-10-16 12:16:20,892 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 12:16:20,892 INFO L276 IsEmpty]: Start isEmpty. Operand 11109 states and 52128 transitions. [2020-10-16 12:16:20,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 12:16:20,894 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:16:20,894 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:16:21,095 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2020-10-16 12:16:21,095 INFO L429 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]=== [2020-10-16 12:16:21,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:16:21,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1821234682, now seen corresponding path program 2 times [2020-10-16 12:16:21,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:16:21,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436803013] [2020-10-16 12:16:21,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:16:21,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:16:21,216 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:16:21,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436803013] [2020-10-16 12:16:21,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504882279] [2020-10-16 12:16:21,217 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 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 [2020-10-16 12:16:21,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 12:16:21,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:16:21,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 12:16:21,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:16:21,473 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-16 12:16:21,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:16:21,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 17 [2020-10-16 12:16:21,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123538290] [2020-10-16 12:16:21,474 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 12:16:21,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:16:21,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 12:16:21,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2020-10-16 12:16:21,475 INFO L87 Difference]: Start difference. First operand 11109 states and 52128 transitions. Second operand 19 states. [2020-10-16 12:16:24,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:16:24,350 INFO L93 Difference]: Finished difference Result 38095 states and 157882 transitions. [2020-10-16 12:16:24,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-16 12:16:24,351 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-16 12:16:24,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:16:24,452 INFO L225 Difference]: With dead ends: 38095 [2020-10-16 12:16:24,452 INFO L226 Difference]: Without dead ends: 38034 [2020-10-16 12:16:24,452 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=602, Invalid=1948, Unknown=0, NotChecked=0, Total=2550 [2020-10-16 12:16:24,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38034 states. [2020-10-16 12:16:25,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38034 to 10962. [2020-10-16 12:16:25,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10962 states. [2020-10-16 12:16:25,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10962 states to 10962 states and 51396 transitions. [2020-10-16 12:16:25,074 INFO L78 Accepts]: Start accepts. Automaton has 10962 states and 51396 transitions. Word has length 23 [2020-10-16 12:16:25,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:16:25,074 INFO L481 AbstractCegarLoop]: Abstraction has 10962 states and 51396 transitions. [2020-10-16 12:16:25,074 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 12:16:25,075 INFO L276 IsEmpty]: Start isEmpty. Operand 10962 states and 51396 transitions. [2020-10-16 12:16:25,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 12:16:25,078 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:16:25,078 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:16:25,284 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:16:25,285 INFO L429 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]=== [2020-10-16 12:16:25,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:16:25,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1821243238, now seen corresponding path program 2 times [2020-10-16 12:16:25,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:16:25,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831864385] [2020-10-16 12:16:25,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:16:25,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:16:25,424 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:16:25,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831864385] [2020-10-16 12:16:25,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901471849] [2020-10-16 12:16:25,425 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 [2020-10-16 12:16:25,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 12:16:25,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:16:25,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 12:16:25,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:16:25,932 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-16 12:16:25,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:16:25,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 17 [2020-10-16 12:16:25,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825523674] [2020-10-16 12:16:25,933 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 12:16:25,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:16:25,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 12:16:25,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2020-10-16 12:16:25,934 INFO L87 Difference]: Start difference. First operand 10962 states and 51396 transitions. Second operand 19 states. [2020-10-16 12:16:27,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:16:27,758 INFO L93 Difference]: Finished difference Result 23738 states and 97818 transitions. [2020-10-16 12:16:27,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-16 12:16:27,759 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-16 12:16:27,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:16:27,819 INFO L225 Difference]: With dead ends: 23738 [2020-10-16 12:16:27,819 INFO L226 Difference]: Without dead ends: 23677 [2020-10-16 12:16:27,820 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=375, Invalid=1185, Unknown=0, NotChecked=0, Total=1560 [2020-10-16 12:16:27,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23677 states. [2020-10-16 12:16:28,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23677 to 10564. [2020-10-16 12:16:28,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10564 states. [2020-10-16 12:16:28,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10564 states to 10564 states and 49016 transitions. [2020-10-16 12:16:28,236 INFO L78 Accepts]: Start accepts. Automaton has 10564 states and 49016 transitions. Word has length 23 [2020-10-16 12:16:28,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:16:28,236 INFO L481 AbstractCegarLoop]: Abstraction has 10564 states and 49016 transitions. [2020-10-16 12:16:28,236 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 12:16:28,236 INFO L276 IsEmpty]: Start isEmpty. Operand 10564 states and 49016 transitions. [2020-10-16 12:16:28,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 12:16:28,241 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:16:28,241 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:16:28,441 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 12:16:28,441 INFO L429 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]=== [2020-10-16 12:16:28,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:16:28,442 INFO L82 PathProgramCache]: Analyzing trace with hash -1336326282, now seen corresponding path program 1 times [2020-10-16 12:16:28,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:16:28,442 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932051685] [2020-10-16 12:16:28,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:16:28,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:16:28,620 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 12:16:28,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932051685] [2020-10-16 12:16:28,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528882401] [2020-10-16 12:16:28,621 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 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 [2020-10-16 12:16:28,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:16:28,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 12:16:28,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:16:29,160 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:16:29,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:16:29,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 22 [2020-10-16 12:16:29,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186714152] [2020-10-16 12:16:29,161 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 12:16:29,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:16:29,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 12:16:29,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2020-10-16 12:16:29,162 INFO L87 Difference]: Start difference. First operand 10564 states and 49016 transitions. Second operand 24 states. [2020-10-16 12:16:39,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:16:39,655 INFO L93 Difference]: Finished difference Result 48130 states and 178929 transitions. [2020-10-16 12:16:39,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2020-10-16 12:16:39,656 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 25 [2020-10-16 12:16:39,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:16:39,777 INFO L225 Difference]: With dead ends: 48130 [2020-10-16 12:16:39,778 INFO L226 Difference]: Without dead ends: 48070 [2020-10-16 12:16:39,779 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9454 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=3664, Invalid=21142, Unknown=0, NotChecked=0, Total=24806 [2020-10-16 12:16:40,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48070 states. [2020-10-16 12:16:40,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48070 to 10734. [2020-10-16 12:16:40,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10734 states. [2020-10-16 12:16:40,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10734 states to 10734 states and 49858 transitions. [2020-10-16 12:16:40,479 INFO L78 Accepts]: Start accepts. Automaton has 10734 states and 49858 transitions. Word has length 25 [2020-10-16 12:16:40,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:16:40,479 INFO L481 AbstractCegarLoop]: Abstraction has 10734 states and 49858 transitions. [2020-10-16 12:16:40,479 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 12:16:40,480 INFO L276 IsEmpty]: Start isEmpty. Operand 10734 states and 49858 transitions. [2020-10-16 12:16:40,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 12:16:40,483 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:16:40,483 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:16:40,684 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-10-16 12:16:40,684 INFO L429 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]=== [2020-10-16 12:16:40,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:16:40,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1376528103, now seen corresponding path program 1 times [2020-10-16 12:16:40,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:16:40,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755882786] [2020-10-16 12:16:40,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:16:40,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:16:40,826 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 12:16:40,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755882786] [2020-10-16 12:16:40,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597761250] [2020-10-16 12:16:40,827 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 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 [2020-10-16 12:16:40,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:16:40,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 12:16:40,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:16:41,361 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:16:41,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:16:41,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 21 [2020-10-16 12:16:41,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853919268] [2020-10-16 12:16:41,362 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 12:16:41,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:16:41,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 12:16:41,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2020-10-16 12:16:41,363 INFO L87 Difference]: Start difference. First operand 10734 states and 49858 transitions. Second operand 23 states. [2020-10-16 12:16:51,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 12:16:51,281 INFO L93 Difference]: Finished difference Result 47600 states and 177575 transitions. [2020-10-16 12:16:51,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2020-10-16 12:16:51,282 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 25 [2020-10-16 12:16:51,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 12:16:51,706 INFO L225 Difference]: With dead ends: 47600 [2020-10-16 12:16:51,707 INFO L226 Difference]: Without dead ends: 47547 [2020-10-16 12:16:51,707 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7396 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=2911, Invalid=16829, Unknown=0, NotChecked=0, Total=19740 [2020-10-16 12:16:51,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47547 states. [2020-10-16 12:16:52,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47547 to 11057. [2020-10-16 12:16:52,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11057 states. [2020-10-16 12:16:52,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11057 states to 11057 states and 51421 transitions. [2020-10-16 12:16:52,381 INFO L78 Accepts]: Start accepts. Automaton has 11057 states and 51421 transitions. Word has length 25 [2020-10-16 12:16:52,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 12:16:52,381 INFO L481 AbstractCegarLoop]: Abstraction has 11057 states and 51421 transitions. [2020-10-16 12:16:52,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 12:16:52,382 INFO L276 IsEmpty]: Start isEmpty. Operand 11057 states and 51421 transitions. [2020-10-16 12:16:52,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 12:16:52,386 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 12:16:52,386 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 12:16:52,586 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2020-10-16 12:16:52,587 INFO L429 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]=== [2020-10-16 12:16:52,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 12:16:52,588 INFO L82 PathProgramCache]: Analyzing trace with hash -1026000266, now seen corresponding path program 2 times [2020-10-16 12:16:52,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 12:16:52,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951922864] [2020-10-16 12:16:52,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 12:16:52,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 12:16:52,765 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 12:16:52,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951922864] [2020-10-16 12:16:52,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386446246] [2020-10-16 12:16:52,766 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 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 [2020-10-16 12:16:52,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 12:16:52,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 12:16:52,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 12:16:52,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 12:16:53,177 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-16 12:16:53,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 12:16:53,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2020-10-16 12:16:53,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260591019] [2020-10-16 12:16:53,179 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 12:16:53,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 12:16:53,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 12:16:53,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2020-10-16 12:16:53,179 INFO L87 Difference]: Start difference. First operand 11057 states and 51421 transitions. Second operand 24 states. Received shutdown request... [2020-10-16 12:16:55,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-16 12:16:55,651 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-10-16 12:16:55,651 WARN L546 AbstractCegarLoop]: Verification canceled [2020-10-16 12:16:55,657 WARN L235 ceAbstractionStarter]: Timeout [2020-10-16 12:16:55,657 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 12:16:55 BasicIcfg [2020-10-16 12:16:55,657 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-16 12:16:55,658 INFO L168 Benchmark]: Toolchain (without parser) took 244673.26 ms. Allocated memory was 139.5 MB in the beginning and 2.2 GB in the end (delta: 2.1 GB). Free memory was 101.5 MB in the beginning and 1.1 GB in the end (delta: -1.0 GB). Peak memory consumption was 1.1 GB. Max. memory is 7.1 GB. [2020-10-16 12:16:55,659 INFO L168 Benchmark]: CDTParser took 0.56 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.6 MB in the end (delta: 419.6 kB). Peak memory consumption was 419.6 kB. Max. memory is 7.1 GB. [2020-10-16 12:16:55,659 INFO L168 Benchmark]: CACSL2BoogieTranslator took 686.04 ms. Allocated memory was 139.5 MB in the beginning and 201.3 MB in the end (delta: 61.9 MB). Free memory was 101.0 MB in the beginning and 160.3 MB in the end (delta: -59.3 MB). Peak memory consumption was 24.9 MB. Max. memory is 7.1 GB. [2020-10-16 12:16:55,659 INFO L168 Benchmark]: Boogie Procedure Inliner took 70.71 ms. Allocated memory is still 201.3 MB. Free memory was 160.3 MB in the beginning and 158.1 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.2 MB. Max. memory is 7.1 GB. [2020-10-16 12:16:55,660 INFO L168 Benchmark]: Boogie Preprocessor took 27.99 ms. Allocated memory is still 201.3 MB. Free memory was 158.1 MB in the beginning and 156.2 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. [2020-10-16 12:16:55,660 INFO L168 Benchmark]: RCFGBuilder took 431.32 ms. Allocated memory is still 201.3 MB. Free memory was 156.2 MB in the beginning and 135.9 MB in the end (delta: 20.3 MB). Peak memory consumption was 20.3 MB. Max. memory is 7.1 GB. [2020-10-16 12:16:55,660 INFO L168 Benchmark]: TraceAbstraction took 243450.13 ms. Allocated memory was 201.3 MB in the beginning and 2.2 GB in the end (delta: 2.0 GB). Free memory was 135.0 MB in the beginning and 1.1 GB in the end (delta: -968.4 MB). Peak memory consumption was 1.1 GB. Max. memory is 7.1 GB. [2020-10-16 12:16:55,662 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.56 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.6 MB in the end (delta: 419.6 kB). Peak memory consumption was 419.6 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 686.04 ms. Allocated memory was 139.5 MB in the beginning and 201.3 MB in the end (delta: 61.9 MB). Free memory was 101.0 MB in the beginning and 160.3 MB in the end (delta: -59.3 MB). Peak memory consumption was 24.9 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 70.71 ms. Allocated memory is still 201.3 MB. Free memory was 160.3 MB in the beginning and 158.1 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 27.99 ms. Allocated memory is still 201.3 MB. Free memory was 158.1 MB in the beginning and 156.2 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 431.32 ms. Allocated memory is still 201.3 MB. Free memory was 156.2 MB in the beginning and 135.9 MB in the end (delta: 20.3 MB). Peak memory consumption was 20.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 243450.13 ms. Allocated memory was 201.3 MB in the beginning and 2.2 GB in the end (delta: 2.0 GB). Free memory was 135.0 MB in the beginning and 1.1 GB in the end (delta: -968.4 MB). Peak memory consumption was 1.1 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 381 VarBasedMoverChecksPositive, 2 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 3 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 1.9s, 64 PlacesBefore, 18 PlacesAfterwards, 61 TransitionsBefore, 12 TransitionsAfterwards, 692 CoEnabledTransitionPairs, 6 FixpointIterations, 26 TrivialSequentialCompositions, 25 ConcurrentSequentialCompositions, 2 TrivialYvCompositions, 5 ConcurrentYvCompositions, 3 ChoiceCompositions, 61 TotalNumberOfCompositions, 623 MoverChecksTotal - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 614 VarBasedMoverChecksPositive, 12 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 30 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 1.3s, 85 PlacesBefore, 31 PlacesAfterwards, 79 TransitionsBefore, 21 TransitionsAfterwards, 1108 CoEnabledTransitionPairs, 6 FixpointIterations, 31 TrivialSequentialCompositions, 25 ConcurrentSequentialCompositions, 6 TrivialYvCompositions, 6 ConcurrentYvCompositions, 4 ChoiceCompositions, 72 TotalNumberOfCompositions, 1509 MoverChecksTotal - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 876 VarBasedMoverChecksPositive, 18 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 52 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 1.7s, 106 PlacesBefore, 41 PlacesAfterwards, 97 TransitionsBefore, 27 TransitionsAfterwards, 1608 CoEnabledTransitionPairs, 6 FixpointIterations, 47 TrivialSequentialCompositions, 29 ConcurrentSequentialCompositions, 7 TrivialYvCompositions, 6 ConcurrentYvCompositions, 5 ChoiceCompositions, 94 TotalNumberOfCompositions, 2380 MoverChecksTotal - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 1127 VarBasedMoverChecksPositive, 17 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 47 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 2.0s, 127 PlacesBefore, 51 PlacesAfterwards, 115 TransitionsBefore, 33 TransitionsAfterwards, 2192 CoEnabledTransitionPairs, 6 FixpointIterations, 54 TrivialSequentialCompositions, 35 ConcurrentSequentialCompositions, 9 TrivialYvCompositions, 3 ConcurrentYvCompositions, 6 ChoiceCompositions, 107 TotalNumberOfCompositions, 3160 MoverChecksTotal - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 1454 VarBasedMoverChecksPositive, 24 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 65 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 2.5s, 148 PlacesBefore, 61 PlacesAfterwards, 133 TransitionsBefore, 39 TransitionsAfterwards, 2860 CoEnabledTransitionPairs, 5 FixpointIterations, 62 TrivialSequentialCompositions, 41 ConcurrentSequentialCompositions, 12 TrivialYvCompositions, 4 ConcurrentYvCompositions, 7 ChoiceCompositions, 126 TotalNumberOfCompositions, 4341 MoverChecksTotal - TimeoutResultAtElement [Line: 679]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 679). Cancelled while BasicCegarLoop was constructing difference of abstraction (11057states) and FLOYD_HOARE automaton (currently 36 states, 24 states before enhancement),while ReachableStatesComputation was computing reachable states (165 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 58 locations, 1 error locations. Started 5 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 243.1s, OverallIterations: 69, TraceHistogramMax: 5, AutomataDifference: 184.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 10.4s, HoareTripleCheckerStatistics: 3071 SDtfs, 26262 SDslu, 25671 SDs, 0 SdLazy, 70709 SolverSat, 4135 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 47.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4556 GetRequests, 468 SyntacticMatches, 0 SemanticMatches, 4088 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177653 ImplicationChecksByTransitivity, 105.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=11460occurred in iteration=20, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 18.4s AutomataMinimizationTime, 64 MinimizatonAttempts, 852704 StatesRemovedByMinimization, 58 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 14.9s InterpolantComputationTime, 2109 NumberOfCodeBlocks, 2109 NumberOfCodeBlocksAsserted, 155 NumberOfCheckSat, 1936 ConstructedInterpolants, 0 QuantifiedInterpolants, 210072 SizeOfPredicates, 274 NumberOfNonLiveVariables, 5427 ConjunctsInSsa, 494 ConjunctsInUnsatCore, 111 InterpolantComputations, 19 PerfectInterpolantSequences, 285/888 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown