/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA.epf -i ../../../trunk/examples/svcomp/pthread/triangular-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7a177ad [2020-11-09 13:29:49,574 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-09 13:29:49,576 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-09 13:29:49,613 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-09 13:29:49,614 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-09 13:29:49,615 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-09 13:29:49,617 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-09 13:29:49,619 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-09 13:29:49,621 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-09 13:29:49,622 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-09 13:29:49,623 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-09 13:29:49,624 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-09 13:29:49,625 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-09 13:29:49,626 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-09 13:29:49,627 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-09 13:29:49,629 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-09 13:29:49,630 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-09 13:29:49,631 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-09 13:29:49,633 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-09 13:29:49,647 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-09 13:29:49,649 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-09 13:29:49,654 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-09 13:29:49,655 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-09 13:29:49,659 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-09 13:29:49,664 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-09 13:29:49,664 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-09 13:29:49,665 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-09 13:29:49,669 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-09 13:29:49,670 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-09 13:29:49,671 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-09 13:29:49,671 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-09 13:29:49,676 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-09 13:29:49,678 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-09 13:29:49,678 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-09 13:29:49,680 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-09 13:29:49,680 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-09 13:29:49,684 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-09 13:29:49,685 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-09 13:29:49,685 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-09 13:29:49,686 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-09 13:29:49,687 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-09 13:29:49,688 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA.epf [2020-11-09 13:29:49,737 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-09 13:29:49,738 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-09 13:29:49,742 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-09 13:29:49,742 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-09 13:29:49,743 INFO L138 SettingsManager]: * Use SBE=true [2020-11-09 13:29:49,743 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-09 13:29:49,744 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-09 13:29:49,744 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-09 13:29:49,744 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-09 13:29:49,744 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-09 13:29:49,746 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-09 13:29:49,746 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-09 13:29:49,746 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-09 13:29:49,747 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-09 13:29:49,747 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-09 13:29:49,747 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-09 13:29:49,747 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-09 13:29:49,748 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-09 13:29:49,748 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-09 13:29:49,748 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-09 13:29:49,748 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-09 13:29:49,748 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-09 13:29:49,749 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-09 13:29:49,749 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2020-11-09 13:29:49,749 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-09 13:29:49,749 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-09 13:29:49,749 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-09 13:29:49,750 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-11-09 13:29:49,750 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-09 13:29:50,176 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-09 13:29:50,203 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-09 13:29:50,206 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-09 13:29:50,207 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-09 13:29:50,208 INFO L275 PluginConnector]: CDTParser initialized [2020-11-09 13:29:50,212 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-1.i [2020-11-09 13:29:50,292 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ad5d07c0/b0089bb3a2474716af376d06c68feed6/FLAG55ac97a59 [2020-11-09 13:29:51,017 INFO L306 CDTParser]: Found 1 translation units. [2020-11-09 13:29:51,018 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-1.i [2020-11-09 13:29:51,039 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ad5d07c0/b0089bb3a2474716af376d06c68feed6/FLAG55ac97a59 [2020-11-09 13:29:51,249 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ad5d07c0/b0089bb3a2474716af376d06c68feed6 [2020-11-09 13:29:51,254 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-09 13:29:51,262 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-11-09 13:29:51,266 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-09 13:29:51,266 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-09 13:29:51,270 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-09 13:29:51,271 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 01:29:51" (1/1) ... [2020-11-09 13:29:51,276 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7482bf37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:29:51, skipping insertion in model container [2020-11-09 13:29:51,276 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 01:29:51" (1/1) ... [2020-11-09 13:29:51,286 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-09 13:29:51,327 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-09 13:29:51,742 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-09 13:29:51,753 INFO L203 MainTranslator]: Completed pre-run [2020-11-09 13:29:51,805 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-09 13:29:51,943 INFO L208 MainTranslator]: Completed translation [2020-11-09 13:29:51,943 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:29:51 WrapperNode [2020-11-09 13:29:51,944 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-09 13:29:51,945 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-09 13:29:51,945 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-09 13:29:51,945 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-09 13:29:51,954 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:29:51" (1/1) ... [2020-11-09 13:29:51,970 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:29:51" (1/1) ... [2020-11-09 13:29:51,996 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-09 13:29:51,996 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-09 13:29:51,997 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-09 13:29:51,997 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-09 13:29:52,006 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:29:51" (1/1) ... [2020-11-09 13:29:52,007 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:29:51" (1/1) ... [2020-11-09 13:29:52,010 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:29:51" (1/1) ... [2020-11-09 13:29:52,010 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:29:51" (1/1) ... [2020-11-09 13:29:52,016 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:29:51" (1/1) ... [2020-11-09 13:29:52,020 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:29:51" (1/1) ... [2020-11-09 13:29:52,023 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:29:51" (1/1) ... [2020-11-09 13:29:52,026 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-09 13:29:52,027 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-09 13:29:52,027 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-09 13:29:52,027 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-09 13:29:52,028 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:29:51" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-09 13:29:52,106 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-11-09 13:29:52,106 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-11-09 13:29:52,106 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-11-09 13:29:52,106 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-11-09 13:29:52,107 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-09 13:29:52,107 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-11-09 13:29:52,107 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-09 13:29:52,107 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-09 13:29:52,107 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-09 13:29:52,107 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-11-09 13:29:52,108 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-09 13:29:52,108 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-09 13:29:52,110 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-11-09 13:29:52,540 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-09 13:29:52,541 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-11-09 13:29:52,543 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 01:29:52 BoogieIcfgContainer [2020-11-09 13:29:52,543 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-09 13:29:52,545 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-09 13:29:52,545 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-09 13:29:52,548 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-09 13:29:52,549 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 01:29:51" (1/3) ... [2020-11-09 13:29:52,549 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ab3daef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 01:29:52, skipping insertion in model container [2020-11-09 13:29:52,550 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:29:51" (2/3) ... [2020-11-09 13:29:52,550 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ab3daef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 01:29:52, skipping insertion in model container [2020-11-09 13:29:52,550 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 01:29:52" (3/3) ... [2020-11-09 13:29:52,552 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-1.i [2020-11-09 13:29:52,567 WARN L168 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-11-09 13:29:52,567 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-09 13:29:52,571 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-09 13:29:52,572 INFO L351 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-11-09 13:29:52,608 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:52,608 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:52,609 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:52,609 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:52,609 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:52,609 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:52,610 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:52,610 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:52,610 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:52,610 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:52,611 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:52,611 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:52,611 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:52,611 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:52,612 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:52,612 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:52,612 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:52,612 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:52,613 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:52,613 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:52,613 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:52,613 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:52,614 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:52,614 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:52,614 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:52,614 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:52,615 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:52,615 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:52,615 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:52,616 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:52,616 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:52,616 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:52,616 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:52,616 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:52,617 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:52,617 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:52,617 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:52,617 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:52,618 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:52,618 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:52,618 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:52,618 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:52,619 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:52,619 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:52,619 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:52,619 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:52,620 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:52,620 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:52,620 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:52,620 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:52,621 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:52,621 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:52,621 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:52,621 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:52,622 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:52,622 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:52,624 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:52,624 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:52,625 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:52,625 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:52,625 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:52,625 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:52,632 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:52,633 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:52,633 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:52,633 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:52,633 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:52,633 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:29:52,637 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-11-09 13:29:52,650 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-11-09 13:29:52,673 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-09 13:29:52,674 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-09 13:29:52,674 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-11-09 13:29:52,674 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-09 13:29:52,674 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-09 13:29:52,674 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-09 13:29:52,675 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-09 13:29:52,675 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-09 13:29:52,687 INFO L128 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2020-11-09 13:29:52,687 INFO L135 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 65 places, 64 transitions, 138 flow [2020-11-09 13:29:52,691 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 65 places, 64 transitions, 138 flow [2020-11-09 13:29:52,693 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 65 places, 64 transitions, 138 flow [2020-11-09 13:29:52,732 INFO L129 PetriNetUnfolder]: 6/62 cut-off events. [2020-11-09 13:29:52,732 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-11-09 13:29:52,737 INFO L84 FinitePrefix]: Finished finitePrefix Result has 69 conditions, 62 events. 6/62 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 97 event pairs, 0 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 46. Up to 2 conditions per place. [2020-11-09 13:29:52,740 INFO L116 LiptonReduction]: Number of co-enabled transitions 1144 [2020-11-09 13:29:55,442 WARN L194 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-11-09 13:29:55,684 WARN L194 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-11-09 13:29:56,803 WARN L194 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-11-09 13:29:56,964 WARN L194 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-11-09 13:29:57,287 WARN L194 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-11-09 13:29:57,456 WARN L194 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-11-09 13:29:58,032 WARN L194 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 89 [2020-11-09 13:29:58,227 WARN L194 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-11-09 13:29:58,669 WARN L194 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 89 [2020-11-09 13:29:58,856 WARN L194 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-11-09 13:29:58,920 INFO L131 LiptonReduction]: Checked pairs total: 1187 [2020-11-09 13:29:58,920 INFO L133 LiptonReduction]: Total number of compositions: 62 [2020-11-09 13:29:58,928 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 16 transitions, 42 flow [2020-11-09 13:29:58,938 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-11-09 13:29:58,940 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-11-09 13:29:58,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-09 13:29:58,946 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:29:58,947 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-09 13:29:58,947 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:29:58,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:29:58,953 INFO L82 PathProgramCache]: Analyzing trace with hash -805875314, now seen corresponding path program 1 times [2020-11-09 13:29:58,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:29:58,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922714355] [2020-11-09 13:29:58,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:29:59,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:29:59,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:29:59,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922714355] [2020-11-09 13:29:59,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-09 13:29:59,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-09 13:29:59,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269880119] [2020-11-09 13:29:59,222 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-09 13:29:59,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:29:59,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-09 13:29:59,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-09 13:29:59,240 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-11-09 13:29:59,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:29:59,331 INFO L93 Difference]: Finished difference Result 75 states and 190 transitions. [2020-11-09 13:29:59,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-09 13:29:59,333 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-11-09 13:29:59,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:29:59,345 INFO L225 Difference]: With dead ends: 75 [2020-11-09 13:29:59,345 INFO L226 Difference]: Without dead ends: 42 [2020-11-09 13:29:59,346 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-09 13:29:59,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-11-09 13:29:59,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-11-09 13:29:59,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-11-09 13:29:59,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-11-09 13:29:59,387 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 6 [2020-11-09 13:29:59,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:29:59,387 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-11-09 13:29:59,387 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-09 13:29:59,388 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-11-09 13:29:59,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-09 13:29:59,388 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:29:59,389 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:29:59,389 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-09 13:29:59,389 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:29:59,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:29:59,390 INFO L82 PathProgramCache]: Analyzing trace with hash -1351909113, now seen corresponding path program 1 times [2020-11-09 13:29:59,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:29:59,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236262044] [2020-11-09 13:29:59,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:29:59,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:29:59,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:29:59,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236262044] [2020-11-09 13:29:59,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-09 13:29:59,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-09 13:29:59,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150904329] [2020-11-09 13:29:59,503 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-09 13:29:59,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:29:59,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-09 13:29:59,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-09 13:29:59,505 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2020-11-09 13:29:59,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:29:59,563 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-11-09 13:29:59,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-09 13:29:59,564 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-11-09 13:29:59,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:29:59,566 INFO L225 Difference]: With dead ends: 56 [2020-11-09 13:29:59,566 INFO L226 Difference]: Without dead ends: 50 [2020-11-09 13:29:59,567 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-11-09 13:29:59,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-11-09 13:29:59,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-11-09 13:29:59,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-11-09 13:29:59,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-11-09 13:29:59,578 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-11-09 13:29:59,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:29:59,579 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-11-09 13:29:59,579 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-09 13:29:59,579 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-11-09 13:29:59,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-09 13:29:59,580 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:29:59,580 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:29:59,580 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-09 13:29:59,581 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:29:59,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:29:59,581 INFO L82 PathProgramCache]: Analyzing trace with hash 2021583950, now seen corresponding path program 1 times [2020-11-09 13:29:59,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:29:59,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144804383] [2020-11-09 13:29:59,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:29:59,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:29:59,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:29:59,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144804383] [2020-11-09 13:29:59,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-09 13:29:59,705 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-09 13:29:59,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22825769] [2020-11-09 13:29:59,706 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-09 13:29:59,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:29:59,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-09 13:29:59,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-09 13:29:59,707 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 6 states. [2020-11-09 13:29:59,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:29:59,880 INFO L93 Difference]: Finished difference Result 54 states and 124 transitions. [2020-11-09 13:29:59,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-09 13:29:59,881 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-11-09 13:29:59,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:29:59,882 INFO L225 Difference]: With dead ends: 54 [2020-11-09 13:29:59,882 INFO L226 Difference]: Without dead ends: 47 [2020-11-09 13:29:59,883 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-11-09 13:29:59,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-11-09 13:29:59,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2020-11-09 13:29:59,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-11-09 13:29:59,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 106 transitions. [2020-11-09 13:29:59,891 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 106 transitions. Word has length 10 [2020-11-09 13:29:59,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:29:59,891 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 106 transitions. [2020-11-09 13:29:59,891 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-09 13:29:59,891 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 106 transitions. [2020-11-09 13:29:59,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-09 13:29:59,892 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:29:59,892 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:29:59,893 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-09 13:29:59,893 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:29:59,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:29:59,894 INFO L82 PathProgramCache]: Analyzing trace with hash 2101929440, now seen corresponding path program 2 times [2020-11-09 13:29:59,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:29:59,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974836876] [2020-11-09 13:29:59,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:29:59,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:29:59,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:29:59,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974836876] [2020-11-09 13:29:59,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-09 13:29:59,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-09 13:29:59,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077403453] [2020-11-09 13:29:59,984 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-09 13:29:59,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:29:59,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-09 13:29:59,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-09 13:29:59,987 INFO L87 Difference]: Start difference. First operand 45 states and 106 transitions. Second operand 6 states. [2020-11-09 13:30:00,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:00,136 INFO L93 Difference]: Finished difference Result 59 states and 138 transitions. [2020-11-09 13:30:00,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-09 13:30:00,141 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-11-09 13:30:00,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:00,143 INFO L225 Difference]: With dead ends: 59 [2020-11-09 13:30:00,143 INFO L226 Difference]: Without dead ends: 53 [2020-11-09 13:30:00,143 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-11-09 13:30:00,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-11-09 13:30:00,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 41. [2020-11-09 13:30:00,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-11-09 13:30:00,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 96 transitions. [2020-11-09 13:30:00,149 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 96 transitions. Word has length 10 [2020-11-09 13:30:00,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:00,150 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 96 transitions. [2020-11-09 13:30:00,150 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-09 13:30:00,150 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 96 transitions. [2020-11-09 13:30:00,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-09 13:30:00,151 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:00,151 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:00,151 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-09 13:30:00,151 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:00,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:00,152 INFO L82 PathProgramCache]: Analyzing trace with hash 2082353870, now seen corresponding path program 3 times [2020-11-09 13:30:00,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:00,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666955386] [2020-11-09 13:30:00,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:00,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:00,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:00,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666955386] [2020-11-09 13:30:00,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-09 13:30:00,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-09 13:30:00,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434781617] [2020-11-09 13:30:00,244 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-09 13:30:00,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:00,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-09 13:30:00,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-09 13:30:00,246 INFO L87 Difference]: Start difference. First operand 41 states and 96 transitions. Second operand 6 states. [2020-11-09 13:30:00,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:00,375 INFO L93 Difference]: Finished difference Result 65 states and 152 transitions. [2020-11-09 13:30:00,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-09 13:30:00,377 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-11-09 13:30:00,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:00,378 INFO L225 Difference]: With dead ends: 65 [2020-11-09 13:30:00,378 INFO L226 Difference]: Without dead ends: 52 [2020-11-09 13:30:00,378 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-11-09 13:30:00,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-11-09 13:30:00,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 41. [2020-11-09 13:30:00,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-11-09 13:30:00,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 99 transitions. [2020-11-09 13:30:00,384 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 99 transitions. Word has length 10 [2020-11-09 13:30:00,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:00,385 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 99 transitions. [2020-11-09 13:30:00,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-09 13:30:00,385 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 99 transitions. [2020-11-09 13:30:00,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-09 13:30:00,386 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:00,386 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:00,386 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-09 13:30:00,386 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:00,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:00,387 INFO L82 PathProgramCache]: Analyzing trace with hash 735328415, now seen corresponding path program 4 times [2020-11-09 13:30:00,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:00,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137950972] [2020-11-09 13:30:00,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:00,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:00,499 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:00,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137950972] [2020-11-09 13:30:00,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140807005] [2020-11-09 13:30:00,500 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:00,630 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 13:30:00,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:00,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-09 13:30:00,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:00,685 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 13:30:00,702 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:00,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:00,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-11-09 13:30:00,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537959011] [2020-11-09 13:30:00,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-09 13:30:00,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:00,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-09 13:30:00,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-11-09 13:30:00,705 INFO L87 Difference]: Start difference. First operand 41 states and 99 transitions. Second operand 8 states. [2020-11-09 13:30:01,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:01,186 INFO L93 Difference]: Finished difference Result 63 states and 147 transitions. [2020-11-09 13:30:01,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-09 13:30:01,187 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-11-09 13:30:01,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:01,188 INFO L225 Difference]: With dead ends: 63 [2020-11-09 13:30:01,190 INFO L226 Difference]: Without dead ends: 54 [2020-11-09 13:30:01,190 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-11-09 13:30:01,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-11-09 13:30:01,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 37. [2020-11-09 13:30:01,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-11-09 13:30:01,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 87 transitions. [2020-11-09 13:30:01,203 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 87 transitions. Word has length 11 [2020-11-09 13:30:01,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:01,204 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 87 transitions. [2020-11-09 13:30:01,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-09 13:30:01,206 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 87 transitions. [2020-11-09 13:30:01,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-09 13:30:01,207 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:01,208 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:01,421 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-11-09 13:30:01,422 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:01,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:01,423 INFO L82 PathProgramCache]: Analyzing trace with hash 128488628, now seen corresponding path program 5 times [2020-11-09 13:30:01,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:01,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671637692] [2020-11-09 13:30:01,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:01,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:01,513 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:01,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671637692] [2020-11-09 13:30:01,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496835899] [2020-11-09 13:30:01,514 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:01,636 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 13:30:01,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:01,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-09 13:30:01,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:01,665 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:01,690 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:01,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:01,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-11-09 13:30:01,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706964199] [2020-11-09 13:30:01,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-09 13:30:01,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:01,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-09 13:30:01,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-11-09 13:30:01,695 INFO L87 Difference]: Start difference. First operand 37 states and 87 transitions. Second operand 8 states. [2020-11-09 13:30:01,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:01,901 INFO L93 Difference]: Finished difference Result 56 states and 133 transitions. [2020-11-09 13:30:01,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-09 13:30:01,902 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-11-09 13:30:01,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:01,903 INFO L225 Difference]: With dead ends: 56 [2020-11-09 13:30:01,903 INFO L226 Difference]: Without dead ends: 51 [2020-11-09 13:30:01,904 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-11-09 13:30:01,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-11-09 13:30:01,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 43. [2020-11-09 13:30:01,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-11-09 13:30:01,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 105 transitions. [2020-11-09 13:30:01,910 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 105 transitions. Word has length 11 [2020-11-09 13:30:01,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:01,911 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 105 transitions. [2020-11-09 13:30:01,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-09 13:30:01,911 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 105 transitions. [2020-11-09 13:30:01,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-09 13:30:01,912 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:01,912 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:02,112 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:02,113 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:02,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:02,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1416964401, now seen corresponding path program 6 times [2020-11-09 13:30:02,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:02,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697325955] [2020-11-09 13:30:02,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:02,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:02,293 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:02,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697325955] [2020-11-09 13:30:02,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976485582] [2020-11-09 13:30:02,294 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:02,396 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-11-09 13:30:02,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:02,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-09 13:30:02,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:02,402 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:02,417 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:02,417 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:02,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-11-09 13:30:02,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914317669] [2020-11-09 13:30:02,418 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-09 13:30:02,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:02,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-09 13:30:02,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-11-09 13:30:02,419 INFO L87 Difference]: Start difference. First operand 43 states and 105 transitions. Second operand 8 states. [2020-11-09 13:30:02,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:02,644 INFO L93 Difference]: Finished difference Result 56 states and 131 transitions. [2020-11-09 13:30:02,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-09 13:30:02,645 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-11-09 13:30:02,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:02,646 INFO L225 Difference]: With dead ends: 56 [2020-11-09 13:30:02,646 INFO L226 Difference]: Without dead ends: 50 [2020-11-09 13:30:02,646 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2020-11-09 13:30:02,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-11-09 13:30:02,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2020-11-09 13:30:02,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-11-09 13:30:02,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2020-11-09 13:30:02,661 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 12 [2020-11-09 13:30:02,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:02,661 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2020-11-09 13:30:02,661 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-09 13:30:02,661 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2020-11-09 13:30:02,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-09 13:30:02,662 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:02,662 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:02,875 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:02,876 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:02,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:02,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1320372483, now seen corresponding path program 7 times [2020-11-09 13:30:02,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:02,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271872649] [2020-11-09 13:30:02,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:02,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:03,006 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:03,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271872649] [2020-11-09 13:30:03,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683273057] [2020-11-09 13:30:03,007 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:03,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:03,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-09 13:30:03,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:03,168 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:03,191 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:03,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:03,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-11-09 13:30:03,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598560040] [2020-11-09 13:30:03,192 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-09 13:30:03,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:03,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-09 13:30:03,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-11-09 13:30:03,194 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand 9 states. [2020-11-09 13:30:03,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:03,574 INFO L93 Difference]: Finished difference Result 63 states and 149 transitions. [2020-11-09 13:30:03,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-09 13:30:03,575 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-11-09 13:30:03,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:03,576 INFO L225 Difference]: With dead ends: 63 [2020-11-09 13:30:03,576 INFO L226 Difference]: Without dead ends: 58 [2020-11-09 13:30:03,576 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-11-09 13:30:03,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-11-09 13:30:03,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 41. [2020-11-09 13:30:03,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-11-09 13:30:03,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 97 transitions. [2020-11-09 13:30:03,581 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 97 transitions. Word has length 12 [2020-11-09 13:30:03,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:03,582 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 97 transitions. [2020-11-09 13:30:03,582 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-09 13:30:03,582 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 97 transitions. [2020-11-09 13:30:03,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-09 13:30:03,586 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:03,586 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:03,799 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:03,800 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:03,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:03,802 INFO L82 PathProgramCache]: Analyzing trace with hash -311794613, now seen corresponding path program 8 times [2020-11-09 13:30:03,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:03,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273407339] [2020-11-09 13:30:03,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:03,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:03,935 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:03,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273407339] [2020-11-09 13:30:03,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444829982] [2020-11-09 13:30:03,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:04,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 13:30:04,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:04,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-09 13:30:04,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:04,079 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 13:30:04,093 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:04,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:04,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-11-09 13:30:04,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139891912] [2020-11-09 13:30:04,095 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-09 13:30:04,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:04,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-09 13:30:04,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-11-09 13:30:04,096 INFO L87 Difference]: Start difference. First operand 41 states and 97 transitions. Second operand 9 states. [2020-11-09 13:30:04,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:04,507 INFO L93 Difference]: Finished difference Result 71 states and 167 transitions. [2020-11-09 13:30:04,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-09 13:30:04,508 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-11-09 13:30:04,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:04,509 INFO L225 Difference]: With dead ends: 71 [2020-11-09 13:30:04,509 INFO L226 Difference]: Without dead ends: 62 [2020-11-09 13:30:04,509 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2020-11-09 13:30:04,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-11-09 13:30:04,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 47. [2020-11-09 13:30:04,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-11-09 13:30:04,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 115 transitions. [2020-11-09 13:30:04,524 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 115 transitions. Word has length 12 [2020-11-09 13:30:04,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:04,524 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 115 transitions. [2020-11-09 13:30:04,524 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-09 13:30:04,524 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 115 transitions. [2020-11-09 13:30:04,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-09 13:30:04,525 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:04,525 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:04,736 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-11-09 13:30:04,737 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:04,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:04,738 INFO L82 PathProgramCache]: Analyzing trace with hash -2018100772, now seen corresponding path program 9 times [2020-11-09 13:30:04,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:04,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372001146] [2020-11-09 13:30:04,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:04,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:04,864 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:04,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372001146] [2020-11-09 13:30:04,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505395955] [2020-11-09 13:30:04,865 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:04,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-09 13:30:04,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:04,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-09 13:30:04,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:05,017 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 13:30:05,032 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:05,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:05,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-11-09 13:30:05,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735109336] [2020-11-09 13:30:05,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-09 13:30:05,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:05,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-09 13:30:05,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-11-09 13:30:05,035 INFO L87 Difference]: Start difference. First operand 47 states and 115 transitions. Second operand 10 states. [2020-11-09 13:30:05,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:05,553 INFO L93 Difference]: Finished difference Result 72 states and 169 transitions. [2020-11-09 13:30:05,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-09 13:30:05,554 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-11-09 13:30:05,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:05,554 INFO L225 Difference]: With dead ends: 72 [2020-11-09 13:30:05,555 INFO L226 Difference]: Without dead ends: 63 [2020-11-09 13:30:05,555 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2020-11-09 13:30:05,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-11-09 13:30:05,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 41. [2020-11-09 13:30:05,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-11-09 13:30:05,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 97 transitions. [2020-11-09 13:30:05,560 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 97 transitions. Word has length 13 [2020-11-09 13:30:05,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:05,560 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 97 transitions. [2020-11-09 13:30:05,560 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-09 13:30:05,560 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 97 transitions. [2020-11-09 13:30:05,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-09 13:30:05,561 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:05,561 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:05,771 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:05,772 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:05,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:05,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1075670313, now seen corresponding path program 10 times [2020-11-09 13:30:05,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:05,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791688943] [2020-11-09 13:30:05,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:05,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:05,894 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:05,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791688943] [2020-11-09 13:30:05,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45865537] [2020-11-09 13:30:05,894 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:06,000 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 13:30:06,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:06,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-09 13:30:06,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:06,051 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:06,073 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:06,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:06,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-11-09 13:30:06,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994821146] [2020-11-09 13:30:06,075 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-09 13:30:06,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:06,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-09 13:30:06,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-11-09 13:30:06,076 INFO L87 Difference]: Start difference. First operand 41 states and 97 transitions. Second operand 10 states. [2020-11-09 13:30:06,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:06,434 INFO L93 Difference]: Finished difference Result 64 states and 153 transitions. [2020-11-09 13:30:06,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-09 13:30:06,435 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-11-09 13:30:06,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:06,436 INFO L225 Difference]: With dead ends: 64 [2020-11-09 13:30:06,436 INFO L226 Difference]: Without dead ends: 59 [2020-11-09 13:30:06,437 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2020-11-09 13:30:06,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-11-09 13:30:06,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 49. [2020-11-09 13:30:06,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-11-09 13:30:06,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 121 transitions. [2020-11-09 13:30:06,441 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 121 transitions. Word has length 13 [2020-11-09 13:30:06,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:06,442 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 121 transitions. [2020-11-09 13:30:06,442 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-09 13:30:06,442 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 121 transitions. [2020-11-09 13:30:06,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-09 13:30:06,443 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:06,443 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:06,653 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:06,654 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:06,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:06,655 INFO L82 PathProgramCache]: Analyzing trace with hash 198162772, now seen corresponding path program 11 times [2020-11-09 13:30:06,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:06,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276818865] [2020-11-09 13:30:06,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:06,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:06,812 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:06,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276818865] [2020-11-09 13:30:06,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750233538] [2020-11-09 13:30:06,814 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:06,922 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-11-09 13:30:06,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:06,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-09 13:30:06,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:06,937 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:06,952 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:06,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:06,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-11-09 13:30:06,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005106516] [2020-11-09 13:30:06,953 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-09 13:30:06,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:06,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-09 13:30:06,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-11-09 13:30:06,954 INFO L87 Difference]: Start difference. First operand 49 states and 121 transitions. Second operand 10 states. [2020-11-09 13:30:07,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:07,220 INFO L93 Difference]: Finished difference Result 64 states and 151 transitions. [2020-11-09 13:30:07,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-09 13:30:07,221 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-11-09 13:30:07,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:07,222 INFO L225 Difference]: With dead ends: 64 [2020-11-09 13:30:07,222 INFO L226 Difference]: Without dead ends: 58 [2020-11-09 13:30:07,223 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-11-09 13:30:07,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-11-09 13:30:07,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2020-11-09 13:30:07,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-11-09 13:30:07,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 127 transitions. [2020-11-09 13:30:07,227 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 127 transitions. Word has length 14 [2020-11-09 13:30:07,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:07,227 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 127 transitions. [2020-11-09 13:30:07,228 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-09 13:30:07,228 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 127 transitions. [2020-11-09 13:30:07,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-09 13:30:07,228 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:07,229 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:07,439 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-11-09 13:30:07,440 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:07,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:07,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1863413606, now seen corresponding path program 12 times [2020-11-09 13:30:07,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:07,442 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914083520] [2020-11-09 13:30:07,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:07,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:07,562 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:07,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914083520] [2020-11-09 13:30:07,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292414455] [2020-11-09 13:30:07,563 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:07,677 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-11-09 13:30:07,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:07,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-09 13:30:07,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:07,728 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:07,747 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:07,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:07,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-11-09 13:30:07,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093206723] [2020-11-09 13:30:07,748 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-09 13:30:07,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:07,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-09 13:30:07,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-11-09 13:30:07,749 INFO L87 Difference]: Start difference. First operand 52 states and 127 transitions. Second operand 11 states. [2020-11-09 13:30:08,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:08,268 INFO L93 Difference]: Finished difference Result 73 states and 173 transitions. [2020-11-09 13:30:08,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-09 13:30:08,268 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-11-09 13:30:08,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:08,269 INFO L225 Difference]: With dead ends: 73 [2020-11-09 13:30:08,269 INFO L226 Difference]: Without dead ends: 68 [2020-11-09 13:30:08,270 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2020-11-09 13:30:08,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-11-09 13:30:08,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 45. [2020-11-09 13:30:08,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-11-09 13:30:08,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 107 transitions. [2020-11-09 13:30:08,274 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 107 transitions. Word has length 14 [2020-11-09 13:30:08,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:08,275 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 107 transitions. [2020-11-09 13:30:08,275 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-09 13:30:08,275 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 107 transitions. [2020-11-09 13:30:08,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-09 13:30:08,276 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:08,276 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:08,486 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:08,487 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:08,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:08,488 INFO L82 PathProgramCache]: Analyzing trace with hash 1013983880, now seen corresponding path program 13 times [2020-11-09 13:30:08,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:08,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606542940] [2020-11-09 13:30:08,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:08,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:08,599 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:08,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606542940] [2020-11-09 13:30:08,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126685650] [2020-11-09 13:30:08,600 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:08,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:08,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-09 13:30:08,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:08,752 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 13:30:08,794 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:08,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:08,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-11-09 13:30:08,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906264813] [2020-11-09 13:30:08,796 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-09 13:30:08,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:08,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-09 13:30:08,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-11-09 13:30:08,797 INFO L87 Difference]: Start difference. First operand 45 states and 107 transitions. Second operand 11 states. [2020-11-09 13:30:09,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:09,395 INFO L93 Difference]: Finished difference Result 81 states and 191 transitions. [2020-11-09 13:30:09,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-09 13:30:09,400 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-11-09 13:30:09,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:09,401 INFO L225 Difference]: With dead ends: 81 [2020-11-09 13:30:09,401 INFO L226 Difference]: Without dead ends: 72 [2020-11-09 13:30:09,402 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=182, Invalid=370, Unknown=0, NotChecked=0, Total=552 [2020-11-09 13:30:09,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-11-09 13:30:09,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 53. [2020-11-09 13:30:09,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-11-09 13:30:09,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 131 transitions. [2020-11-09 13:30:09,406 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 131 transitions. Word has length 14 [2020-11-09 13:30:09,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:09,406 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 131 transitions. [2020-11-09 13:30:09,406 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-09 13:30:09,406 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 131 transitions. [2020-11-09 13:30:09,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-09 13:30:09,407 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:09,407 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:09,618 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-11-09 13:30:09,618 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:09,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:09,620 INFO L82 PathProgramCache]: Analyzing trace with hash 1931272153, now seen corresponding path program 14 times [2020-11-09 13:30:09,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:09,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384301018] [2020-11-09 13:30:09,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:09,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:09,797 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:09,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384301018] [2020-11-09 13:30:09,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419014112] [2020-11-09 13:30:09,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:09,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 13:30:09,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:09,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-09 13:30:09,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:09,964 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:09,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:09,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-11-09 13:30:09,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502663566] [2020-11-09 13:30:09,966 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-09 13:30:09,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:09,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-09 13:30:09,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-11-09 13:30:09,967 INFO L87 Difference]: Start difference. First operand 53 states and 131 transitions. Second operand 12 states. [2020-11-09 13:30:10,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:10,688 INFO L93 Difference]: Finished difference Result 82 states and 193 transitions. [2020-11-09 13:30:10,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-09 13:30:10,689 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-11-09 13:30:10,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:10,690 INFO L225 Difference]: With dead ends: 82 [2020-11-09 13:30:10,691 INFO L226 Difference]: Without dead ends: 73 [2020-11-09 13:30:10,691 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=215, Invalid=487, Unknown=0, NotChecked=0, Total=702 [2020-11-09 13:30:10,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-11-09 13:30:10,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 45. [2020-11-09 13:30:10,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-11-09 13:30:10,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 107 transitions. [2020-11-09 13:30:10,695 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 107 transitions. Word has length 15 [2020-11-09 13:30:10,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:10,696 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 107 transitions. [2020-11-09 13:30:10,696 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-09 13:30:10,696 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 107 transitions. [2020-11-09 13:30:10,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-09 13:30:10,697 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:10,697 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:10,907 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-11-09 13:30:10,907 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:10,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:10,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1368757306, now seen corresponding path program 15 times [2020-11-09 13:30:10,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:10,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210424540] [2020-11-09 13:30:10,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:10,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:11,058 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:11,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210424540] [2020-11-09 13:30:11,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673302415] [2020-11-09 13:30:11,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:11,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-09 13:30:11,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:11,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-09 13:30:11,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:11,217 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:11,237 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:11,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:11,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-11-09 13:30:11,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551300272] [2020-11-09 13:30:11,239 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-09 13:30:11,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:11,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-09 13:30:11,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-11-09 13:30:11,240 INFO L87 Difference]: Start difference. First operand 45 states and 107 transitions. Second operand 12 states. [2020-11-09 13:30:11,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:11,805 INFO L93 Difference]: Finished difference Result 72 states and 173 transitions. [2020-11-09 13:30:11,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-09 13:30:11,806 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-11-09 13:30:11,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:11,807 INFO L225 Difference]: With dead ends: 72 [2020-11-09 13:30:11,807 INFO L226 Difference]: Without dead ends: 67 [2020-11-09 13:30:11,807 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=205, Invalid=395, Unknown=0, NotChecked=0, Total=600 [2020-11-09 13:30:11,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-11-09 13:30:11,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 55. [2020-11-09 13:30:11,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-11-09 13:30:11,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 137 transitions. [2020-11-09 13:30:11,811 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 137 transitions. Word has length 15 [2020-11-09 13:30:11,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:11,811 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 137 transitions. [2020-11-09 13:30:11,811 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-09 13:30:11,811 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 137 transitions. [2020-11-09 13:30:11,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-09 13:30:11,812 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:11,812 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:12,024 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-11-09 13:30:12,025 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:12,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:12,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1455869111, now seen corresponding path program 16 times [2020-11-09 13:30:12,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:12,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400525115] [2020-11-09 13:30:12,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:12,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:12,234 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:12,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400525115] [2020-11-09 13:30:12,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799313192] [2020-11-09 13:30:12,235 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:12,366 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 13:30:12,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:12,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-09 13:30:12,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:12,371 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:12,387 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:12,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:12,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-11-09 13:30:12,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988300249] [2020-11-09 13:30:12,388 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-09 13:30:12,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:12,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-09 13:30:12,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-11-09 13:30:12,389 INFO L87 Difference]: Start difference. First operand 55 states and 137 transitions. Second operand 12 states. [2020-11-09 13:30:12,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:12,737 INFO L93 Difference]: Finished difference Result 72 states and 171 transitions. [2020-11-09 13:30:12,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-09 13:30:12,738 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-11-09 13:30:12,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:12,739 INFO L225 Difference]: With dead ends: 72 [2020-11-09 13:30:12,739 INFO L226 Difference]: Without dead ends: 66 [2020-11-09 13:30:12,740 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=275, Unknown=0, NotChecked=0, Total=420 [2020-11-09 13:30:12,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-11-09 13:30:12,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 58. [2020-11-09 13:30:12,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-11-09 13:30:12,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 143 transitions. [2020-11-09 13:30:12,744 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 143 transitions. Word has length 16 [2020-11-09 13:30:12,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:12,744 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 143 transitions. [2020-11-09 13:30:12,744 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-09 13:30:12,744 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 143 transitions. [2020-11-09 13:30:12,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-09 13:30:12,746 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:12,746 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:12,955 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-11-09 13:30:12,956 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:12,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:12,957 INFO L82 PathProgramCache]: Analyzing trace with hash -260077303, now seen corresponding path program 17 times [2020-11-09 13:30:12,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:12,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993626993] [2020-11-09 13:30:12,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:12,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:13,117 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:13,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993626993] [2020-11-09 13:30:13,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318809057] [2020-11-09 13:30:13,118 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:13,226 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-11-09 13:30:13,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:13,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-09 13:30:13,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:13,265 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:13,287 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:13,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:13,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-11-09 13:30:13,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835455886] [2020-11-09 13:30:13,288 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-09 13:30:13,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:13,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-09 13:30:13,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-11-09 13:30:13,289 INFO L87 Difference]: Start difference. First operand 58 states and 143 transitions. Second operand 13 states. [2020-11-09 13:30:14,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:14,017 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-11-09 13:30:14,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-09 13:30:14,018 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-11-09 13:30:14,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:14,019 INFO L225 Difference]: With dead ends: 83 [2020-11-09 13:30:14,019 INFO L226 Difference]: Without dead ends: 78 [2020-11-09 13:30:14,020 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=298, Invalid=572, Unknown=0, NotChecked=0, Total=870 [2020-11-09 13:30:14,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-11-09 13:30:14,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 49. [2020-11-09 13:30:14,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-11-09 13:30:14,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 117 transitions. [2020-11-09 13:30:14,024 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 117 transitions. Word has length 16 [2020-11-09 13:30:14,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:14,024 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 117 transitions. [2020-11-09 13:30:14,024 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-09 13:30:14,024 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 117 transitions. [2020-11-09 13:30:14,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-09 13:30:14,025 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:14,025 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:14,235 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:14,236 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:14,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:14,237 INFO L82 PathProgramCache]: Analyzing trace with hash -518171259, now seen corresponding path program 18 times [2020-11-09 13:30:14,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:14,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170443575] [2020-11-09 13:30:14,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:14,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:14,396 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:14,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170443575] [2020-11-09 13:30:14,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176514830] [2020-11-09 13:30:14,396 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:14,504 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-11-09 13:30:14,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:14,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-09 13:30:14,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:14,555 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:14,556 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:14,556 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-11-09 13:30:14,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070470339] [2020-11-09 13:30:14,556 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-09 13:30:14,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:14,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-09 13:30:14,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-11-09 13:30:14,558 INFO L87 Difference]: Start difference. First operand 49 states and 117 transitions. Second operand 13 states. [2020-11-09 13:30:15,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:15,294 INFO L93 Difference]: Finished difference Result 91 states and 215 transitions. [2020-11-09 13:30:15,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-09 13:30:15,295 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-11-09 13:30:15,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:15,296 INFO L225 Difference]: With dead ends: 91 [2020-11-09 13:30:15,296 INFO L226 Difference]: Without dead ends: 82 [2020-11-09 13:30:15,297 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=224, Invalid=532, Unknown=0, NotChecked=0, Total=756 [2020-11-09 13:30:15,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-11-09 13:30:15,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 59. [2020-11-09 13:30:15,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-11-09 13:30:15,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 147 transitions. [2020-11-09 13:30:15,300 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 147 transitions. Word has length 16 [2020-11-09 13:30:15,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:15,300 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 147 transitions. [2020-11-09 13:30:15,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-09 13:30:15,300 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 147 transitions. [2020-11-09 13:30:15,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-09 13:30:15,301 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:15,301 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:15,503 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:15,504 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:15,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:15,505 INFO L82 PathProgramCache]: Analyzing trace with hash 527563414, now seen corresponding path program 19 times [2020-11-09 13:30:15,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:15,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515117966] [2020-11-09 13:30:15,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:15,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:15,667 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:15,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515117966] [2020-11-09 13:30:15,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046103479] [2020-11-09 13:30:15,668 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:15,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:15,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-09 13:30:15,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:15,851 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 13:30:15,871 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:15,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:15,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-11-09 13:30:15,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583525944] [2020-11-09 13:30:15,872 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-09 13:30:15,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:15,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-09 13:30:15,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-11-09 13:30:15,874 INFO L87 Difference]: Start difference. First operand 59 states and 147 transitions. Second operand 14 states. [2020-11-09 13:30:16,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:16,779 INFO L93 Difference]: Finished difference Result 92 states and 217 transitions. [2020-11-09 13:30:16,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-09 13:30:16,784 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-11-09 13:30:16,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:16,785 INFO L225 Difference]: With dead ends: 92 [2020-11-09 13:30:16,785 INFO L226 Difference]: Without dead ends: 83 [2020-11-09 13:30:16,786 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=337, Invalid=719, Unknown=0, NotChecked=0, Total=1056 [2020-11-09 13:30:16,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-11-09 13:30:16,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 49. [2020-11-09 13:30:16,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-11-09 13:30:16,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 117 transitions. [2020-11-09 13:30:16,789 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 117 transitions. Word has length 17 [2020-11-09 13:30:16,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:16,789 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 117 transitions. [2020-11-09 13:30:16,789 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-09 13:30:16,789 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 117 transitions. [2020-11-09 13:30:16,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-09 13:30:16,790 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:16,790 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:16,998 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:16,999 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:16,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:16,999 INFO L82 PathProgramCache]: Analyzing trace with hash 1116588253, now seen corresponding path program 20 times [2020-11-09 13:30:17,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:17,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106283596] [2020-11-09 13:30:17,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:17,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:17,162 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:17,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106283596] [2020-11-09 13:30:17,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819825812] [2020-11-09 13:30:17,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:17,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 13:30:17,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:17,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-09 13:30:17,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:17,302 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:17,338 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:17,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:17,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-11-09 13:30:17,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828161652] [2020-11-09 13:30:17,340 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-09 13:30:17,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:17,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-09 13:30:17,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-11-09 13:30:17,341 INFO L87 Difference]: Start difference. First operand 49 states and 117 transitions. Second operand 14 states. [2020-11-09 13:30:18,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:18,130 INFO L93 Difference]: Finished difference Result 80 states and 193 transitions. [2020-11-09 13:30:18,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-09 13:30:18,131 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-11-09 13:30:18,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:18,133 INFO L225 Difference]: With dead ends: 80 [2020-11-09 13:30:18,133 INFO L226 Difference]: Without dead ends: 75 [2020-11-09 13:30:18,134 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=311, Invalid=619, Unknown=0, NotChecked=0, Total=930 [2020-11-09 13:30:18,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-11-09 13:30:18,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 61. [2020-11-09 13:30:18,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-11-09 13:30:18,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-11-09 13:30:18,137 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 17 [2020-11-09 13:30:18,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:18,137 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-11-09 13:30:18,137 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-09 13:30:18,137 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-11-09 13:30:18,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-09 13:30:18,138 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:18,138 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:18,348 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-11-09 13:30:18,349 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:18,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:18,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1069116582, now seen corresponding path program 21 times [2020-11-09 13:30:18,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:18,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948438377] [2020-11-09 13:30:18,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:18,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:18,627 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:18,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948438377] [2020-11-09 13:30:18,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353378612] [2020-11-09 13:30:18,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:18,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-11-09 13:30:18,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:18,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-09 13:30:18,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:18,749 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:18,771 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:18,772 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:18,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-11-09 13:30:18,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316469173] [2020-11-09 13:30:18,773 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-09 13:30:18,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:18,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-09 13:30:18,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-11-09 13:30:18,774 INFO L87 Difference]: Start difference. First operand 61 states and 153 transitions. Second operand 14 states. [2020-11-09 13:30:19,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:19,227 INFO L93 Difference]: Finished difference Result 80 states and 191 transitions. [2020-11-09 13:30:19,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-09 13:30:19,228 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-11-09 13:30:19,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:19,229 INFO L225 Difference]: With dead ends: 80 [2020-11-09 13:30:19,229 INFO L226 Difference]: Without dead ends: 74 [2020-11-09 13:30:19,229 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=204, Invalid=396, Unknown=0, NotChecked=0, Total=600 [2020-11-09 13:30:19,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-11-09 13:30:19,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 64. [2020-11-09 13:30:19,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-11-09 13:30:19,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 159 transitions. [2020-11-09 13:30:19,232 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 159 transitions. Word has length 18 [2020-11-09 13:30:19,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:19,233 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 159 transitions. [2020-11-09 13:30:19,233 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-09 13:30:19,233 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 159 transitions. [2020-11-09 13:30:19,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-09 13:30:19,233 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:19,234 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:19,444 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-11-09 13:30:19,445 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:19,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:19,446 INFO L82 PathProgramCache]: Analyzing trace with hash -825375252, now seen corresponding path program 22 times [2020-11-09 13:30:19,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:19,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000770228] [2020-11-09 13:30:19,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:19,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:19,639 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:19,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000770228] [2020-11-09 13:30:19,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892885311] [2020-11-09 13:30:19,640 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:19,752 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 13:30:19,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:19,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-09 13:30:19,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:19,802 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 13:30:19,830 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:19,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:19,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-11-09 13:30:19,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379052561] [2020-11-09 13:30:19,831 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-09 13:30:19,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:19,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-09 13:30:19,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-11-09 13:30:19,832 INFO L87 Difference]: Start difference. First operand 64 states and 159 transitions. Second operand 15 states. [2020-11-09 13:30:20,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:20,807 INFO L93 Difference]: Finished difference Result 93 states and 221 transitions. [2020-11-09 13:30:20,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-09 13:30:20,808 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-11-09 13:30:20,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:20,809 INFO L225 Difference]: With dead ends: 93 [2020-11-09 13:30:20,809 INFO L226 Difference]: Without dead ends: 88 [2020-11-09 13:30:20,810 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=425, Invalid=835, Unknown=0, NotChecked=0, Total=1260 [2020-11-09 13:30:20,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-11-09 13:30:20,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 53. [2020-11-09 13:30:20,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-11-09 13:30:20,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 127 transitions. [2020-11-09 13:30:20,813 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 127 transitions. Word has length 18 [2020-11-09 13:30:20,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:20,813 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 127 transitions. [2020-11-09 13:30:20,813 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-09 13:30:20,813 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 127 transitions. [2020-11-09 13:30:20,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-09 13:30:20,814 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:20,814 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:21,022 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-11-09 13:30:21,023 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:21,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:21,024 INFO L82 PathProgramCache]: Analyzing trace with hash 254522690, now seen corresponding path program 23 times [2020-11-09 13:30:21,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:21,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158332650] [2020-11-09 13:30:21,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:21,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:21,211 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:21,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158332650] [2020-11-09 13:30:21,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859062245] [2020-11-09 13:30:21,211 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:21,326 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-11-09 13:30:21,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:21,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-09 13:30:21,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:21,363 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 13:30:21,384 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:21,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:30:21,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-11-09 13:30:21,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670538782] [2020-11-09 13:30:21,385 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-09 13:30:21,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:21,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-09 13:30:21,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-11-09 13:30:21,386 INFO L87 Difference]: Start difference. First operand 53 states and 127 transitions. Second operand 15 states. [2020-11-09 13:30:22,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:22,437 INFO L93 Difference]: Finished difference Result 101 states and 239 transitions. [2020-11-09 13:30:22,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-09 13:30:22,438 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-11-09 13:30:22,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:22,439 INFO L225 Difference]: With dead ends: 101 [2020-11-09 13:30:22,439 INFO L226 Difference]: Without dead ends: 92 [2020-11-09 13:30:22,440 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=402, Invalid=858, Unknown=0, NotChecked=0, Total=1260 [2020-11-09 13:30:22,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-11-09 13:30:22,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 65. [2020-11-09 13:30:22,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-11-09 13:30:22,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 163 transitions. [2020-11-09 13:30:22,443 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 163 transitions. Word has length 18 [2020-11-09 13:30:22,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:22,443 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 163 transitions. [2020-11-09 13:30:22,443 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-09 13:30:22,443 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 163 transitions. [2020-11-09 13:30:22,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-09 13:30:22,444 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:22,444 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:22,654 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-11-09 13:30:22,655 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:22,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:22,656 INFO L82 PathProgramCache]: Analyzing trace with hash 183196179, now seen corresponding path program 24 times [2020-11-09 13:30:22,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:22,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536026098] [2020-11-09 13:30:22,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:22,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:22,735 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:22,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536026098] [2020-11-09 13:30:22,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043566544] [2020-11-09 13:30:22,736 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:22,855 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-11-09 13:30:22,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:30:22,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-09 13:30:22,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:22,875 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:22,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-09 13:30:22,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 9 [2020-11-09 13:30:22,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410915584] [2020-11-09 13:30:22,876 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-09 13:30:22,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:22,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-09 13:30:22,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2020-11-09 13:30:22,877 INFO L87 Difference]: Start difference. First operand 65 states and 163 transitions. Second operand 8 states. [2020-11-09 13:30:22,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:22,901 INFO L93 Difference]: Finished difference Result 144 states and 324 transitions. [2020-11-09 13:30:22,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-09 13:30:22,909 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-11-09 13:30:22,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:22,909 INFO L225 Difference]: With dead ends: 144 [2020-11-09 13:30:22,909 INFO L226 Difference]: Without dead ends: 36 [2020-11-09 13:30:22,910 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2020-11-09 13:30:22,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-11-09 13:30:22,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-11-09 13:30:22,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-11-09 13:30:22,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 65 transitions. [2020-11-09 13:30:22,913 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 65 transitions. Word has length 19 [2020-11-09 13:30:22,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:22,913 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 65 transitions. [2020-11-09 13:30:22,913 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-09 13:30:22,913 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 65 transitions. [2020-11-09 13:30:22,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-09 13:30:22,914 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:30:22,914 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:30:23,120 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-11-09 13:30:23,121 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:30:23,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:30:23,122 INFO L82 PathProgramCache]: Analyzing trace with hash -699703104, now seen corresponding path program 25 times [2020-11-09 13:30:23,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:30:23,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554415554] [2020-11-09 13:30:23,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:30:23,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:23,205 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:23,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554415554] [2020-11-09 13:30:23,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194109703] [2020-11-09 13:30:23,206 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:23,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:30:23,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-09 13:30:23,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:30:23,329 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:30:23,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-09 13:30:23,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 9 [2020-11-09 13:30:23,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296239920] [2020-11-09 13:30:23,330 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-09 13:30:23,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:30:23,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-09 13:30:23,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2020-11-09 13:30:23,331 INFO L87 Difference]: Start difference. First operand 36 states and 65 transitions. Second operand 8 states. [2020-11-09 13:30:23,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:30:23,350 INFO L93 Difference]: Finished difference Result 56 states and 79 transitions. [2020-11-09 13:30:23,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-09 13:30:23,351 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-11-09 13:30:23,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:30:23,352 INFO L225 Difference]: With dead ends: 56 [2020-11-09 13:30:23,352 INFO L226 Difference]: Without dead ends: 0 [2020-11-09 13:30:23,352 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2020-11-09 13:30:23,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-09 13:30:23,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-09 13:30:23,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-09 13:30:23,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-09 13:30:23,352 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2020-11-09 13:30:23,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:30:23,353 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-09 13:30:23,353 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-09 13:30:23,353 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-09 13:30:23,353 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-09 13:30:23,553 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:30:23,558 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.11 01:30:23 BasicIcfg [2020-11-09 13:30:23,558 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-09 13:30:23,559 INFO L168 Benchmark]: Toolchain (without parser) took 32302.23 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 125.8 MB in the beginning and 134.7 MB in the end (delta: -8.9 MB). Peak memory consumption was 59.1 MB. Max. memory is 8.0 GB. [2020-11-09 13:30:23,560 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 151.0 MB. Free memory was 124.1 MB in the beginning and 124.0 MB in the end (delta: 79.9 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-11-09 13:30:23,560 INFO L168 Benchmark]: CACSL2BoogieTranslator took 677.92 ms. Allocated memory is still 151.0 MB. Free memory was 125.2 MB in the beginning and 130.9 MB in the end (delta: -5.7 MB). Peak memory consumption was 29.8 MB. Max. memory is 8.0 GB. [2020-11-09 13:30:23,560 INFO L168 Benchmark]: Boogie Procedure Inliner took 50.89 ms. Allocated memory is still 151.0 MB. Free memory was 130.4 MB in the beginning and 128.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-11-09 13:30:23,561 INFO L168 Benchmark]: Boogie Preprocessor took 29.54 ms. Allocated memory is still 151.0 MB. Free memory was 128.8 MB in the beginning and 127.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-11-09 13:30:23,561 INFO L168 Benchmark]: RCFGBuilder took 516.26 ms. Allocated memory is still 151.0 MB. Free memory was 127.3 MB in the beginning and 107.4 MB in the end (delta: 19.9 MB). Peak memory consumption was 19.9 MB. Max. memory is 8.0 GB. [2020-11-09 13:30:23,562 INFO L168 Benchmark]: TraceAbstraction took 31013.41 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 106.8 MB in the beginning and 134.7 MB in the end (delta: -27.9 MB). Peak memory consumption was 38.7 MB. Max. memory is 8.0 GB. [2020-11-09 13:30:23,564 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 151.0 MB. Free memory was 124.1 MB in the beginning and 124.0 MB in the end (delta: 79.9 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 677.92 ms. Allocated memory is still 151.0 MB. Free memory was 125.2 MB in the beginning and 130.9 MB in the end (delta: -5.7 MB). Peak memory consumption was 29.8 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 50.89 ms. Allocated memory is still 151.0 MB. Free memory was 130.4 MB in the beginning and 128.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 29.54 ms. Allocated memory is still 151.0 MB. Free memory was 128.8 MB in the beginning and 127.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 516.26 ms. Allocated memory is still 151.0 MB. Free memory was 127.3 MB in the beginning and 107.4 MB in the end (delta: 19.9 MB). Peak memory consumption was 19.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 31013.41 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 106.8 MB in the beginning and 134.7 MB in the end (delta: -27.9 MB). Peak memory consumption was 38.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 637 VarBasedMoverChecksPositive, 12 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 15 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 6.2s, 65 PlacesBefore, 20 PlacesAfterwards, 64 TransitionsBefore, 16 TransitionsAfterwards, 1144 CoEnabledTransitionPairs, 7 FixpointIterations, 16 TrivialSequentialCompositions, 32 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 11 ConcurrentYvCompositions, 3 ChoiceCompositions, 62 TotalNumberOfCompositions, 1187 MoverChecksTotal - PositiveResult [Line: 685]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 59 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 30.8s, OverallIterations: 27, TraceHistogramMax: 6, AutomataDifference: 12.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 6.2s, HoareTripleCheckerStatistics: 441 SDtfs, 1056 SDslu, 1269 SDs, 0 SdLazy, 1372 SolverSat, 648 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 770 GetRequests, 278 SyntacticMatches, 16 SemanticMatches, 476 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2250 ImplicationChecksByTransitivity, 11.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=65occurred in iteration=25, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 27 MinimizatonAttempts, 394 StatesRemovedByMinimization, 24 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 4.4s InterpolantComputationTime, 704 NumberOfCodeBlocks, 704 NumberOfCodeBlocksAsserted, 86 NumberOfCheckSat, 655 ConstructedInterpolants, 0 QuantifiedInterpolants, 37671 SizeOfPredicates, 136 NumberOfNonLiveVariables, 2486 ConjunctsInSsa, 232 ConjunctsInUnsatCore, 49 InterpolantComputations, 7 PerfectInterpolantSequences, 90/460 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...